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Washington Pesticide Applicator — Requirements & Free Practice

US-WA · License preparation

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Licenses, application pathways and examination requirements

Each license and applicant pathway has its own requirements and exemptions. Choosing practice questions does not determine your eligibility.

Limited Private Applicator

This license is valid in eastern Washington only. Use or supervises the use of restricted use herbicides on non-production agricultural land (e.g., pastures, rangeland, areas around farm buildings) and in mixed rangeland-timber to control noxious weeds. Limitations: Does not allow use of aquatic herbicides. Noxious weed control in mixed rangeland timber areas only permitted if required by state or local regulations. All other herbicide use on forest lands are not allowed. May not use any other type of RUP unless supervised by a fully licensed Private Applicator.

Licensing authority: Washington State Department of Agriculture · Application information

Renewal while certification remains current
No examination is required for this applicant pathway.
Eligibility
Current certification and all continuing licensing requirements remain satisfied; this renewal occurs before the recertification deadline and imposes no new examination.
Renewal
File the renewal application and fee by the prescribed expiration date. Limited and Rancher Private Applicator licences expire on the fifth December 31 after issuance; other applicator licences renew annually.

Official no-examination sources

Effective from 2026-01-01.

Five year recertification by credits — qualified on or after January 1, 2026
No examination is required for this applicant pathway.
Credits
Meet the RCW 17.21.128(2)(a) credit requirement: Private Applicator 20 per five years, maximum 10 annually; Limited Private Applicator eight weed-related credits, at least half directly weed-control-related; Rancher Private Applicator 12; all other applicator types 40, maximum 15 annually.
Initial qualification
Originally qualified on or after January 1, 2026, so the pre-2026 C&T transition course/quiz duty does not apply.
Renewal
Keep the licence renewed and satisfy all other licensing requirements.

Official no-examination sources

Effective from 2026-01-01.

Five year recertification by credits — pre 2026 C&T transition
C&T Quiz (practice unavailable)
Activity changes
The transition may require additional category examinations for new aerial, fumigation or restricted-use activities; use the corresponding category route. C&T compliance transfers the old categories only as the WSDA transition chart specifies.
Course alternative
A completed WSDA-approved C&T course satisfies the C&T requirement instead of the quiz. The C&T quiz grants no ordinary recertification credits.
Credits
Still meet the regular licence-specific recertification credit requirement under RCW 17.21.128(2)(a).
Initial qualification
Originally qualified before January 1, 2026; complete C&T compliance by the end of the recertification cycle existing on that date.
Initial issuance by examination or permitted three exam substitution

At least one of the following alternatives:

Applicant and geographic scope
Limited Private Applicator Description Application Fee* This license is valid in eastern Washington only. Use or supervises the use of restricted use herbicides on non-production agricultural land (e.g., pastures, rangeland, areas around farm buildings) and in mixed rangeland-timber to control noxious weeds. Limitations: Does not allow use of aquatic herbicides. Noxious weed control in mixed rangeland timber areas only permitted if required by state or local regulations. All other herbicide use on forest lands are not allowed. May not use any other type of RUP unless supervised by a fully licensed Private Applicator.
Application and payment
Submit the director-prescribed application identifying the licence, classifications and application method; pay the applicable licence and examination fees before licensing.
Minimum age
At least 18 years old when applying (RCW 17.21.132(2)).
Scope
Use only the pesticides, land and activities authorized by this licence type; qualifying for a broader category does not remove the licence restrictions.
Score currency
A passing licensing score is valid during the calendar year taken and the following calendar year.
Substitution
Either pass the Private Applicator examination, or hold valid passing scores on all three of Washington Laws and Safety, Weed Control, and Insect and Disease Control. The three-exam path is an alternative to the Private Applicator examination, not an additional requirement.
Initial issuance with additional aerial classification

All of the following:

  • At least one of the following alternatives:

  • Aerial Pest Control (practice unavailable)
Additional activity
The licence holder proposes the aerial activity identified in WAC 16-228-1546 and the WSDA category instructions; the corresponding additional classification is required. The Limited/Rancher land and pesticide restrictions still apply.
Applicant and geographic scope
Limited Private Applicator Description Application Fee* This license is valid in eastern Washington only. Use or supervises the use of restricted use herbicides on non-production agricultural land (e.g., pastures, rangeland, areas around farm buildings) and in mixed rangeland-timber to control noxious weeds. Limitations: Does not allow use of aquatic herbicides. Noxious weed control in mixed rangeland timber areas only permitted if required by state or local regulations. All other herbicide use on forest lands are not allowed. May not use any other type of RUP unless supervised by a fully licensed Private Applicator.
Application and payment
Submit the director-prescribed application identifying the licence, classifications and application method; pay the applicable licence and examination fees before licensing.
Minimum age
At least 18 years old when applying (RCW 17.21.132(2)).
Scope
Use only the pesticides, land and activities authorized by this licence type; qualifying for a broader category does not remove the licence restrictions.
Score currency
A passing licensing score is valid during the calendar year taken and the following calendar year.
Substitution
Either pass the Private Applicator examination, or hold valid passing scores on all three of Washington Laws and Safety, Weed Control, and Insect and Disease Control. The three-exam path is an alternative to the Private Applicator examination, not an additional requirement.
Initial issuance with additional soil classification

All of the following:

  • At least one of the following alternatives:

  • Soil Fumigation (practice unavailable)
Additional activity
The licence holder proposes the soil activity identified in WAC 16-228-1546 and the WSDA category instructions; the corresponding additional classification is required. The Limited/Rancher land and pesticide restrictions still apply.
Applicant and geographic scope
Limited Private Applicator Description Application Fee* This license is valid in eastern Washington only. Use or supervises the use of restricted use herbicides on non-production agricultural land (e.g., pastures, rangeland, areas around farm buildings) and in mixed rangeland-timber to control noxious weeds. Limitations: Does not allow use of aquatic herbicides. Noxious weed control in mixed rangeland timber areas only permitted if required by state or local regulations. All other herbicide use on forest lands are not allowed. May not use any other type of RUP unless supervised by a fully licensed Private Applicator.
Application and payment
Submit the director-prescribed application identifying the licence, classifications and application method; pay the applicable licence and examination fees before licensing.
Minimum age
At least 18 years old when applying (RCW 17.21.132(2)).
Scope
Use only the pesticides, land and activities authorized by this licence type; qualifying for a broader category does not remove the licence restrictions.
Score currency
A passing licensing score is valid during the calendar year taken and the following calendar year.
Substitution
Either pass the Private Applicator examination, or hold valid passing scores on all three of Washington Laws and Safety, Weed Control, and Insect and Disease Control. The three-exam path is an alternative to the Private Applicator examination, not an additional requirement.
Initial issuance with additional space classification

All of the following:

  • At least one of the following alternatives:

  • Space Fumigation (practice unavailable)
Additional activity
The licence holder proposes the space activity identified in WAC 16-228-1546 and the WSDA category instructions; the corresponding additional classification is required. The Limited/Rancher land and pesticide restrictions still apply.
Applicant and geographic scope
Limited Private Applicator Description Application Fee* This license is valid in eastern Washington only. Use or supervises the use of restricted use herbicides on non-production agricultural land (e.g., pastures, rangeland, areas around farm buildings) and in mixed rangeland-timber to control noxious weeds. Limitations: Does not allow use of aquatic herbicides. Noxious weed control in mixed rangeland timber areas only permitted if required by state or local regulations. All other herbicide use on forest lands are not allowed. May not use any other type of RUP unless supervised by a fully licensed Private Applicator.
Application and payment
Submit the director-prescribed application identifying the licence, classifications and application method; pay the applicable licence and examination fees before licensing.
Minimum age
At least 18 years old when applying (RCW 17.21.132(2)).
Scope
Use only the pesticides, land and activities authorized by this licence type; qualifying for a broader category does not remove the licence restrictions.
Score currency
A passing licensing score is valid during the calendar year taken and the following calendar year.
Substitution
Either pass the Private Applicator examination, or hold valid passing scores on all three of Washington Laws and Safety, Weed Control, and Insect and Disease Control. The three-exam path is an alternative to the Private Applicator examination, not an additional requirement.
Delinquent renewal with current certification
No examination is required for this applicant pathway.
Eligibility
All certification requirements remain current; file renewal and pay the statutory late fee, unless a qualifying affidavit establishes no licensed activity after expiration.
Recertification
An expired recertification cycle requires the applicable recertification route, rather than this fee-only renewal.

Official no-examination sources

Effective from 2026-01-01.

Initial issuance by reciprocation
C&T Quiz for Reciprocal Applicants (practice unavailable)
Case by case review
From November 1, 2025 WSDA reviews reciprocal requests case by case; the department may waive Washington certification examinations only where comparable certification qualifies.
Current credential
Applicant holds a licence or certification from an eligible EPA- or Canadian-approved federal, state or provincial programme with comparable classifications, examinations and recertification standards. Other jurisdictions' examinations are applicant evidence, never Washington requirement leaves.
Documents
Submit reciprocal request, current licence showing categories and recertification end date, photo identification, licence application and fee. The recertification cycle must not expire within 60 days unless next-cycle recertification evidence is supplied.
Remaining requirements
Meet the Washington requirements for this licence type. Complete the entire reciprocal C&T quiz, regardless of the categories held.
Five year recertification by proof of reciprocal certification — post 2026
No examination is required for this applicant pathway.
Course alternative
The approved C&T course is an alternative to the transition quiz for pre-2026 licensees.
Current certification
Maintain a reciprocal Washington licence and submit current proof of the eligible originating certification at the Washington recertification deadline; satisfy Washington licence conditions and renewal fees.
Original qualification
Originally qualified on or after January 1, 2026.

Official no-examination sources

Effective from 2026-01-01.

Five year recertification by proof of reciprocal certification — pre 2026
C&T Quiz (practice unavailable)
Course alternative
The approved C&T course is an alternative to the transition quiz for pre-2026 licensees.
Current certification
Maintain a reciprocal Washington licence and submit current proof of the eligible originating certification at the Washington recertification deadline; satisfy Washington licence conditions and renewal fees.
Original qualification
Originally qualified before January 1, 2026; complete the C&T course or quiz transition requirement.
Five year recertification by examination — post 2026

At least one of the following alternatives:

Applicable classifications
Hold every classification applicable to the work actually performed; a category authorizes only its published activities. Multiple kinds of work require all applicable category examinations, not an arbitrary choice of one.
Course alternative
For pre-2026 licensees, the WSDA-approved C&T course can satisfy the transition requirement in place of the C&T quiz.
Licence cycle
Retest towards the end of the five-year recertification cycle; pass every exam required for the actual licence type and classifications.
Original qualification
Originally qualified on or after January 1, 2026.
Five year recertification by examination — pre 2026

All of the following:

  • At least one of the following alternatives:

  • C&T Quiz (practice unavailable)
Applicable classifications
Hold every classification applicable to the work actually performed; a category authorizes only its published activities. Multiple kinds of work require all applicable category examinations, not an arbitrary choice of one.
Course alternative
For pre-2026 licensees, the WSDA-approved C&T course can satisfy the transition requirement in place of the C&T quiz.
Licence cycle
Retest towards the end of the five-year recertification cycle; pass every exam required for the actual licence type and classifications.
Original qualification
Originally qualified before January 1, 2026; the C&T course or quiz requirement remains applicable.
Automatic reinstatement after child support release
No examination is required for this applicant pathway.
Continuing requirements
All other reinstatement requirements were continuously met during the suspension; this route does not waive certification or recertification requirements.
Release
Department receives the child-support agency release establishing compliance with the support order.

Official no-examination sources

Effective from 2026-01-01.

Private Applicator

Uses or supervises the use of restricted use pesticides (RUPs) in the production of an agricultural commodity on land owned or rented by the applicator or the applicator's employer. Also required for application of RUPs if applied without compensation other than the trading of personal services between producers of agricultural commodities on the land of another person.

Licensing authority: Washington State Department of Agriculture · Application information

Renewal while certification remains current
No examination is required for this applicant pathway.
Eligibility
Current certification and all continuing licensing requirements remain satisfied; this renewal occurs before the recertification deadline and imposes no new examination.
Renewal
File the renewal application and fee by the prescribed expiration date. Limited and Rancher Private Applicator licences expire on the fifth December 31 after issuance; other applicator licences renew annually.

Official no-examination sources

Effective from 2026-01-01.

Five year recertification by credits — qualified on or after January 1, 2026
No examination is required for this applicant pathway.
Credits
Meet the RCW 17.21.128(2)(a) credit requirement: Private Applicator 20 per five years, maximum 10 annually; Limited Private Applicator eight weed-related credits, at least half directly weed-control-related; Rancher Private Applicator 12; all other applicator types 40, maximum 15 annually.
Initial qualification
Originally qualified on or after January 1, 2026, so the pre-2026 C&T transition course/quiz duty does not apply.
Renewal
Keep the licence renewed and satisfy all other licensing requirements.

Official no-examination sources

Effective from 2026-01-01.

Five year recertification by credits — pre 2026 C&T transition
C&T Quiz (practice unavailable)
Activity changes
The transition may require additional category examinations for new aerial, fumigation or restricted-use activities; use the corresponding category route. C&T compliance transfers the old categories only as the WSDA transition chart specifies.
Course alternative
A completed WSDA-approved C&T course satisfies the C&T requirement instead of the quiz. The C&T quiz grants no ordinary recertification credits.
Credits
Still meet the regular licence-specific recertification credit requirement under RCW 17.21.128(2)(a).
Initial qualification
Originally qualified before January 1, 2026; complete C&T compliance by the end of the recertification cycle existing on that date.
Initial issuance by examination or permitted three exam substitution

At least one of the following alternatives:

Applicant and geographic scope
Private Applicator Description APPLICATION FEE* Uses or supervises the use of restricted use pesticides (RUPs) in the production of an agricultural commodity on land owned or rented by the applicator or the applicator's employer. Also required for application of RUPs if applied without compensation other than the trading of personal services between producers of agricultural commodities on the land of another person.
Application and payment
Submit the director-prescribed application identifying the licence, classifications and application method; pay the applicable licence and examination fees before licensing.
Minimum age
At least 18 years old when applying (RCW 17.21.132(2)).
Scope
Use only the pesticides, land and activities authorized by this licence type; qualifying for a broader category does not remove the licence restrictions.
Score currency
A passing licensing score is valid during the calendar year taken and the following calendar year.
Substitution
Either pass the Private Applicator examination, or hold valid passing scores on all three of Washington Laws and Safety, Weed Control, and Insect and Disease Control. The three-exam path is an alternative to the Private Applicator examination, not an additional requirement.
Initial issuance with additional aerial classification

All of the following:

  • At least one of the following alternatives:

  • Aerial Pest Control (practice unavailable)
Additional activity
The licence holder proposes the aerial activity identified in WAC 16-228-1546 and the WSDA category instructions; the corresponding additional classification is required. The Limited/Rancher land and pesticide restrictions still apply.
Applicant and geographic scope
Private Applicator Description APPLICATION FEE* Uses or supervises the use of restricted use pesticides (RUPs) in the production of an agricultural commodity on land owned or rented by the applicator or the applicator's employer. Also required for application of RUPs if applied without compensation other than the trading of personal services between producers of agricultural commodities on the land of another person.
Application and payment
Submit the director-prescribed application identifying the licence, classifications and application method; pay the applicable licence and examination fees before licensing.
Minimum age
At least 18 years old when applying (RCW 17.21.132(2)).
Scope
Use only the pesticides, land and activities authorized by this licence type; qualifying for a broader category does not remove the licence restrictions.
Score currency
A passing licensing score is valid during the calendar year taken and the following calendar year.
Substitution
Either pass the Private Applicator examination, or hold valid passing scores on all three of Washington Laws and Safety, Weed Control, and Insect and Disease Control. The three-exam path is an alternative to the Private Applicator examination, not an additional requirement.
Initial issuance with additional aquatic classification

All of the following:

  • At least one of the following alternatives:

  • Aquatic Pest Control (practice unavailable)
Additional activity
The licence holder proposes the aquatic activity identified in WAC 16-228-1546 and the WSDA category instructions; the corresponding additional classification is required. The Limited/Rancher land and pesticide restrictions still apply.
Applicant and geographic scope
Private Applicator Description APPLICATION FEE* Uses or supervises the use of restricted use pesticides (RUPs) in the production of an agricultural commodity on land owned or rented by the applicator or the applicator's employer. Also required for application of RUPs if applied without compensation other than the trading of personal services between producers of agricultural commodities on the land of another person.
Application and payment
Submit the director-prescribed application identifying the licence, classifications and application method; pay the applicable licence and examination fees before licensing.
Aquatic trigger
Aquatic application to water moving off the applicant's or employer's agricultural land.
Minimum age
At least 18 years old when applying (RCW 17.21.132(2)).
Scope
Use only the pesticides, land and activities authorized by this licence type; qualifying for a broader category does not remove the licence restrictions.
Score currency
A passing licensing score is valid during the calendar year taken and the following calendar year.
Substitution
Either pass the Private Applicator examination, or hold valid passing scores on all three of Washington Laws and Safety, Weed Control, and Insect and Disease Control. The three-exam path is an alternative to the Private Applicator examination, not an additional requirement.
Initial issuance with additional soil classification

All of the following:

  • At least one of the following alternatives:

  • Soil Fumigation (practice unavailable)
Additional activity
The licence holder proposes the soil activity identified in WAC 16-228-1546 and the WSDA category instructions; the corresponding additional classification is required. The Limited/Rancher land and pesticide restrictions still apply.
Applicant and geographic scope
Private Applicator Description APPLICATION FEE* Uses or supervises the use of restricted use pesticides (RUPs) in the production of an agricultural commodity on land owned or rented by the applicator or the applicator's employer. Also required for application of RUPs if applied without compensation other than the trading of personal services between producers of agricultural commodities on the land of another person.
Application and payment
Submit the director-prescribed application identifying the licence, classifications and application method; pay the applicable licence and examination fees before licensing.
Minimum age
At least 18 years old when applying (RCW 17.21.132(2)).
Scope
Use only the pesticides, land and activities authorized by this licence type; qualifying for a broader category does not remove the licence restrictions.
Score currency
A passing licensing score is valid during the calendar year taken and the following calendar year.
Substitution
Either pass the Private Applicator examination, or hold valid passing scores on all three of Washington Laws and Safety, Weed Control, and Insect and Disease Control. The three-exam path is an alternative to the Private Applicator examination, not an additional requirement.
Initial issuance with additional space classification

All of the following:

  • At least one of the following alternatives:

  • Space Fumigation (practice unavailable)
Additional activity
The licence holder proposes the space activity identified in WAC 16-228-1546 and the WSDA category instructions; the corresponding additional classification is required. The Limited/Rancher land and pesticide restrictions still apply.
Applicant and geographic scope
Private Applicator Description APPLICATION FEE* Uses or supervises the use of restricted use pesticides (RUPs) in the production of an agricultural commodity on land owned or rented by the applicator or the applicator's employer. Also required for application of RUPs if applied without compensation other than the trading of personal services between producers of agricultural commodities on the land of another person.
Application and payment
Submit the director-prescribed application identifying the licence, classifications and application method; pay the applicable licence and examination fees before licensing.
Minimum age
At least 18 years old when applying (RCW 17.21.132(2)).
Scope
Use only the pesticides, land and activities authorized by this licence type; qualifying for a broader category does not remove the licence restrictions.
Score currency
A passing licensing score is valid during the calendar year taken and the following calendar year.
Substitution
Either pass the Private Applicator examination, or hold valid passing scores on all three of Washington Laws and Safety, Weed Control, and Insect and Disease Control. The three-exam path is an alternative to the Private Applicator examination, not an additional requirement.
Delinquent renewal with current certification
No examination is required for this applicant pathway.
Eligibility
All certification requirements remain current; file renewal and pay the statutory late fee, unless a qualifying affidavit establishes no licensed activity after expiration.
Recertification
An expired recertification cycle requires the applicable recertification route, rather than this fee-only renewal.

Official no-examination sources

Effective from 2026-01-01.

Initial issuance by reciprocation
C&T Quiz for Reciprocal Applicants (practice unavailable)
Case by case review
From November 1, 2025 WSDA reviews reciprocal requests case by case; the department may waive Washington certification examinations only where comparable certification qualifies.
Current credential
Applicant holds a licence or certification from an eligible EPA- or Canadian-approved federal, state or provincial programme with comparable classifications, examinations and recertification standards. Other jurisdictions' examinations are applicant evidence, never Washington requirement leaves.
Documents
Submit reciprocal request, current licence showing categories and recertification end date, photo identification, licence application and fee. The recertification cycle must not expire within 60 days unless next-cycle recertification evidence is supplied.
Remaining requirements
Meet the Washington requirements for this licence type. Complete the entire reciprocal C&T quiz, regardless of the categories held.
Five year recertification by proof of reciprocal certification — post 2026
No examination is required for this applicant pathway.
Course alternative
The approved C&T course is an alternative to the transition quiz for pre-2026 licensees.
Current certification
Maintain a reciprocal Washington licence and submit current proof of the eligible originating certification at the Washington recertification deadline; satisfy Washington licence conditions and renewal fees.
Original qualification
Originally qualified on or after January 1, 2026.

Official no-examination sources

Effective from 2026-01-01.

Five year recertification by proof of reciprocal certification — pre 2026
C&T Quiz (practice unavailable)
Course alternative
The approved C&T course is an alternative to the transition quiz for pre-2026 licensees.
Current certification
Maintain a reciprocal Washington licence and submit current proof of the eligible originating certification at the Washington recertification deadline; satisfy Washington licence conditions and renewal fees.
Original qualification
Originally qualified before January 1, 2026; complete the C&T course or quiz transition requirement.
Five year recertification by examination — post 2026

At least one of the following alternatives:

Applicable classifications
Hold every classification applicable to the work actually performed; a category authorizes only its published activities. Multiple kinds of work require all applicable category examinations, not an arbitrary choice of one.
Course alternative
For pre-2026 licensees, the WSDA-approved C&T course can satisfy the transition requirement in place of the C&T quiz.
Licence cycle
Retest towards the end of the five-year recertification cycle; pass every exam required for the actual licence type and classifications.
Original qualification
Originally qualified on or after January 1, 2026.
Five year recertification by examination — pre 2026

All of the following:

  • At least one of the following alternatives:

  • C&T Quiz (practice unavailable)
Applicable classifications
Hold every classification applicable to the work actually performed; a category authorizes only its published activities. Multiple kinds of work require all applicable category examinations, not an arbitrary choice of one.
Course alternative
For pre-2026 licensees, the WSDA-approved C&T course can satisfy the transition requirement in place of the C&T quiz.
Licence cycle
Retest towards the end of the five-year recertification cycle; pass every exam required for the actual licence type and classifications.
Original qualification
Originally qualified before January 1, 2026; the C&T course or quiz requirement remains applicable.
Automatic reinstatement after child support release
No examination is required for this applicant pathway.
Continuing requirements
All other reinstatement requirements were continuously met during the suspension; this route does not waive certification or recertification requirements.
Release
Department receives the child-support agency release establishing compliance with the support order.

Official no-examination sources

Effective from 2026-01-01.

Rancher Private Applicator

This license is valid in eastern Washington only. Uses or supervises the use of restricted use herbicides and rodenticides on non-production agricultural land (e.g., pastures, rangeland, areas around farm buildings) and on limited production agricultural land where hay and grain are grown for personal use. Limitations: Does not allow use of aquatic herbicides. May not use any other type of RUP unless supervised by a fully licensed Private Applicator.

Licensing authority: Washington State Department of Agriculture · Application information

Renewal while certification remains current
No examination is required for this applicant pathway.
Eligibility
Current certification and all continuing licensing requirements remain satisfied; this renewal occurs before the recertification deadline and imposes no new examination.
Renewal
File the renewal application and fee by the prescribed expiration date. Limited and Rancher Private Applicator licences expire on the fifth December 31 after issuance; other applicator licences renew annually.

Official no-examination sources

Effective from 2026-01-01.

Five year recertification by credits — qualified on or after January 1, 2026
No examination is required for this applicant pathway.
Credits
Meet the RCW 17.21.128(2)(a) credit requirement: Private Applicator 20 per five years, maximum 10 annually; Limited Private Applicator eight weed-related credits, at least half directly weed-control-related; Rancher Private Applicator 12; all other applicator types 40, maximum 15 annually.
Initial qualification
Originally qualified on or after January 1, 2026, so the pre-2026 C&T transition course/quiz duty does not apply.
Renewal
Keep the licence renewed and satisfy all other licensing requirements.

Official no-examination sources

Effective from 2026-01-01.

Five year recertification by credits — pre 2026 C&T transition
C&T Quiz (practice unavailable)
Activity changes
The transition may require additional category examinations for new aerial, fumigation or restricted-use activities; use the corresponding category route. C&T compliance transfers the old categories only as the WSDA transition chart specifies.
Course alternative
A completed WSDA-approved C&T course satisfies the C&T requirement instead of the quiz. The C&T quiz grants no ordinary recertification credits.
Credits
Still meet the regular licence-specific recertification credit requirement under RCW 17.21.128(2)(a).
Initial qualification
Originally qualified before January 1, 2026; complete C&T compliance by the end of the recertification cycle existing on that date.
Initial issuance by examination or permitted three exam substitution

At least one of the following alternatives:

Applicant and geographic scope
Rancher Private Applicator Description Application Fee* This license is valid in eastern Washington only. Uses or supervises the use of restricted use herbicides and rodenticides on non-production agricultural land (e.g., pastures, rangeland, areas around farm buildings) and on limited production agricultural land where hay and grain are grown for personal use. Limitations: Does not allow use of aquatic herbicides. May not use any other type of RUP unless supervised by a fully licensed Private Applicator.
Application and payment
Submit the director-prescribed application identifying the licence, classifications and application method; pay the applicable licence and examination fees before licensing.
Minimum age
At least 18 years old when applying (RCW 17.21.132(2)).
Scope
Use only the pesticides, land and activities authorized by this licence type; qualifying for a broader category does not remove the licence restrictions.
Score currency
A passing licensing score is valid during the calendar year taken and the following calendar year.
Substitution
Either pass the Private Applicator examination, or hold valid passing scores on all three of Washington Laws and Safety, Weed Control, and Insect and Disease Control. The three-exam path is an alternative to the Private Applicator examination, not an additional requirement.
Initial issuance with additional aerial classification

All of the following:

  • At least one of the following alternatives:

  • Aerial Pest Control (practice unavailable)
Additional activity
The licence holder proposes the aerial activity identified in WAC 16-228-1546 and the WSDA category instructions; the corresponding additional classification is required. The Limited/Rancher land and pesticide restrictions still apply.
Applicant and geographic scope
Rancher Private Applicator Description Application Fee* This license is valid in eastern Washington only. Uses or supervises the use of restricted use herbicides and rodenticides on non-production agricultural land (e.g., pastures, rangeland, areas around farm buildings) and on limited production agricultural land where hay and grain are grown for personal use. Limitations: Does not allow use of aquatic herbicides. May not use any other type of RUP unless supervised by a fully licensed Private Applicator.
Application and payment
Submit the director-prescribed application identifying the licence, classifications and application method; pay the applicable licence and examination fees before licensing.
Minimum age
At least 18 years old when applying (RCW 17.21.132(2)).
Scope
Use only the pesticides, land and activities authorized by this licence type; qualifying for a broader category does not remove the licence restrictions.
Score currency
A passing licensing score is valid during the calendar year taken and the following calendar year.
Substitution
Either pass the Private Applicator examination, or hold valid passing scores on all three of Washington Laws and Safety, Weed Control, and Insect and Disease Control. The three-exam path is an alternative to the Private Applicator examination, not an additional requirement.
Initial issuance with additional soil classification

All of the following:

  • At least one of the following alternatives:

  • Soil Fumigation (practice unavailable)
Additional activity
The licence holder proposes the soil activity identified in WAC 16-228-1546 and the WSDA category instructions; the corresponding additional classification is required. The Limited/Rancher land and pesticide restrictions still apply.
Applicant and geographic scope
Rancher Private Applicator Description Application Fee* This license is valid in eastern Washington only. Uses or supervises the use of restricted use herbicides and rodenticides on non-production agricultural land (e.g., pastures, rangeland, areas around farm buildings) and on limited production agricultural land where hay and grain are grown for personal use. Limitations: Does not allow use of aquatic herbicides. May not use any other type of RUP unless supervised by a fully licensed Private Applicator.
Application and payment
Submit the director-prescribed application identifying the licence, classifications and application method; pay the applicable licence and examination fees before licensing.
Minimum age
At least 18 years old when applying (RCW 17.21.132(2)).
Scope
Use only the pesticides, land and activities authorized by this licence type; qualifying for a broader category does not remove the licence restrictions.
Score currency
A passing licensing score is valid during the calendar year taken and the following calendar year.
Substitution
Either pass the Private Applicator examination, or hold valid passing scores on all three of Washington Laws and Safety, Weed Control, and Insect and Disease Control. The three-exam path is an alternative to the Private Applicator examination, not an additional requirement.
Initial issuance with additional space classification

All of the following:

  • At least one of the following alternatives:

  • Space Fumigation (practice unavailable)
Additional activity
The licence holder proposes the space activity identified in WAC 16-228-1546 and the WSDA category instructions; the corresponding additional classification is required. The Limited/Rancher land and pesticide restrictions still apply.
Applicant and geographic scope
Rancher Private Applicator Description Application Fee* This license is valid in eastern Washington only. Uses or supervises the use of restricted use herbicides and rodenticides on non-production agricultural land (e.g., pastures, rangeland, areas around farm buildings) and on limited production agricultural land where hay and grain are grown for personal use. Limitations: Does not allow use of aquatic herbicides. May not use any other type of RUP unless supervised by a fully licensed Private Applicator.
Application and payment
Submit the director-prescribed application identifying the licence, classifications and application method; pay the applicable licence and examination fees before licensing.
Minimum age
At least 18 years old when applying (RCW 17.21.132(2)).
Scope
Use only the pesticides, land and activities authorized by this licence type; qualifying for a broader category does not remove the licence restrictions.
Score currency
A passing licensing score is valid during the calendar year taken and the following calendar year.
Substitution
Either pass the Private Applicator examination, or hold valid passing scores on all three of Washington Laws and Safety, Weed Control, and Insect and Disease Control. The three-exam path is an alternative to the Private Applicator examination, not an additional requirement.
Delinquent renewal with current certification
No examination is required for this applicant pathway.
Eligibility
All certification requirements remain current; file renewal and pay the statutory late fee, unless a qualifying affidavit establishes no licensed activity after expiration.
Recertification
An expired recertification cycle requires the applicable recertification route, rather than this fee-only renewal.

Official no-examination sources

Effective from 2026-01-01.

Initial issuance by reciprocation
C&T Quiz for Reciprocal Applicants (practice unavailable)
Case by case review
From November 1, 2025 WSDA reviews reciprocal requests case by case; the department may waive Washington certification examinations only where comparable certification qualifies.
Current credential
Applicant holds a licence or certification from an eligible EPA- or Canadian-approved federal, state or provincial programme with comparable classifications, examinations and recertification standards. Other jurisdictions' examinations are applicant evidence, never Washington requirement leaves.
Documents
Submit reciprocal request, current licence showing categories and recertification end date, photo identification, licence application and fee. The recertification cycle must not expire within 60 days unless next-cycle recertification evidence is supplied.
Remaining requirements
Meet the Washington requirements for this licence type. Complete the entire reciprocal C&T quiz, regardless of the categories held.
Five year recertification by proof of reciprocal certification — post 2026
No examination is required for this applicant pathway.
Course alternative
The approved C&T course is an alternative to the transition quiz for pre-2026 licensees.
Current certification
Maintain a reciprocal Washington licence and submit current proof of the eligible originating certification at the Washington recertification deadline; satisfy Washington licence conditions and renewal fees.
Original qualification
Originally qualified on or after January 1, 2026.

Official no-examination sources

Effective from 2026-01-01.

Five year recertification by proof of reciprocal certification — pre 2026
C&T Quiz (practice unavailable)
Course alternative
The approved C&T course is an alternative to the transition quiz for pre-2026 licensees.
Current certification
Maintain a reciprocal Washington licence and submit current proof of the eligible originating certification at the Washington recertification deadline; satisfy Washington licence conditions and renewal fees.
Original qualification
Originally qualified before January 1, 2026; complete the C&T course or quiz transition requirement.
Five year recertification by examination — post 2026

At least one of the following alternatives:

Applicable classifications
Hold every classification applicable to the work actually performed; a category authorizes only its published activities. Multiple kinds of work require all applicable category examinations, not an arbitrary choice of one.
Course alternative
For pre-2026 licensees, the WSDA-approved C&T course can satisfy the transition requirement in place of the C&T quiz.
Licence cycle
Retest towards the end of the five-year recertification cycle; pass every exam required for the actual licence type and classifications.
Original qualification
Originally qualified on or after January 1, 2026.
Five year recertification by examination — pre 2026

All of the following:

  • At least one of the following alternatives:

  • C&T Quiz (practice unavailable)
Applicable classifications
Hold every classification applicable to the work actually performed; a category authorizes only its published activities. Multiple kinds of work require all applicable category examinations, not an arbitrary choice of one.
Course alternative
For pre-2026 licensees, the WSDA-approved C&T course can satisfy the transition requirement in place of the C&T quiz.
Licence cycle
Retest towards the end of the five-year recertification cycle; pass every exam required for the actual licence type and classifications.
Original qualification
Originally qualified before January 1, 2026; the C&T course or quiz requirement remains applicable.
Automatic reinstatement after child support release
No examination is required for this applicant pathway.
Continuing requirements
All other reinstatement requirements were continuously met during the suspension; this route does not waive certification or recertification requirements.
Release
Department receives the child-support agency release establishing compliance with the support order.

Official no-examination sources

Effective from 2026-01-01.

Aerial Pest Control

Format
Closed-book written examination
Exam questions
50
Time limit
1 hour(s)
Passing score
70 percent
Examination outline
  • Labeling requirements and restrictions specific to aerial application of pesticides including
    • Spray volumes
    • Buffers and no-spray zones
    • Weather conditions specific to wind inversions
    • Label-mandated recordkeeping requirements for aerial pesticide applications including application conditions, if applicable.
  • Understanding how to choose and maintain aerial application equipment including the following
    • The importance of inspecting application equipment to ensure it is in proper operating condition prior to beginning an application
    • Selecting proper nozzles to ensure appropriate pesticide dispersal and to minimize drift
    • Knowledge of the components of an aerial pesticide application system including pesticide hoppers, tanks, pumps, and types of nozzles
    • Interpreting a nozzle flow rate chart
    • Determining the number of nozzles for intended pesticide output using nozzle flow rate chart, aircraft speed, and swath width
    • How to ensure nozzles are placed to compensate for uneven dispersal due to uneven airflow from wingtip vortices, helicopter rotor turbulence, and aircraft propeller turbulence
    • Where to place nozzles to produce the appropriate droplet size
    • How to maintain the application system in good repair including pressure gauge accuracy, filter cleaning according to schedule, and checking nozzles for excessive wear
    • How to calculate required and actual flow rates
    • How to verify flow rate using fixed timing, open timing, known distance, or a flow meter
    • When to adjust and calibrate application equipment.
  • Factors to consider before and during application including
    • Weather conditions that could impact application by affecting aircraft engine power, take-off distance, and climb rate, or by promoting spray droplet evaporation
    • How to determine wind velocity, direction, and air density at the application site
    • The potential impact of thermals and temperature inversions on aerial pesticide application.
  • Methods to minimize off-target movement including
    • How to determine drift potential of a product using a smoke generator
    • How to evaluate vertical and horizontal smoke plumes to assess wind direction, speed, and concentration
    • Selecting techniques that minimize pesticide movement out of the area being treated
    • Documenting special equipment configurations or flight patterns used to reduce off-target pesticide drift.
  • Competency in performing an aerial pesticide application including
    • Selecting a flight altitude that minimizes streaking and off-target pesticide drift
    • Choosing a flight pattern that ensures applicator and bystander safety and proper application
    • The importance of engaging and disengaging spray precisely when entering and exiting a predetermined swath pattern
    • Tools available to mark swaths, such as global positioning systems and flags
    • Recordkeeping requirements for aerial pesticide applications including application conditions, if applicable.
Examination sources

C&T Quiz

Format
Open-book scored online quiz
Exam questions
10
Examination outline
  • Private Applicator Part 1
    • Requirements for applicators making space fumigation or aerial applications
    • Product specific notification requirements
  • Private Applicator Part 2
    • Requirement to provide use‐specific instructions to noncertified applicators using restricted use pesticides (RUPs) under the direct supervision of a certified applicator
    • Relative hazards associated with using pesticides on animals or places in which animals are confined
    • Product-specific notification requirements
  • Laws and Safety Part 1
    • Mandatory vs advisory labelling language
  • Laws and Safety Part 2
    • Know how to communicate information about pesticide exposures and risks with customers and the public
    • Appropriate product stewardship for certified applicators
  • Demonstration and Research
    • Demonstration and Research category as well as the other categories relevant to the kinds of work
  • Insect & Disease Control
    • Pre-Harvest Interval (PHI)
    • Restricted-entry Interval (REI)
  • Weed Control
    • Phytotoxicity
  • Soil Fumigation
    • Pre-application inspection of application equipment
    • Identifying pests causing the damage and verifying they can be controlled with soil fumigation
    • Understanding the relationship between pest density and application rate
    • The importance of proper application depth and timing
  • Vertebrate Pest/PCO General
    • Pests associated with agricultural lands
    • Potential for pesticide persistence
    • Limit water contamination and exposure to non-target organisms
    • Rights-of-Way Environments
    • Labels
  • Space Fumigation
    • Fumigant labels
    • Buffer zones
    • First aid measures to take in the event of exposure to a fumigant
    • Conducting pre‐application inspection of application equipment and the site to be fumigated
    • Fumigant Management Plans (FMPs)
    • Post-Applicator Summary (PAS)
Examination sources

Insect and Disease Control

Format
Closed-book written examination
Exam questions
70
Time limit
2 hour(s)
Passing score
70 percent
Examination outline
  • Crops, grasslands, noncrop agricultural lands, ornamental plants, and turf and pests associated with those areas
  • Preharvest or restricted entry intervals, other entry-restricted periods, and other areas
  • Potential for phytotoxicity, drift, persistence beyond the intended period of pest control, environmental contamination, nontarget exposure, and other problems resulting from the use of pesticides to control insects and diseases
  • Application methods to minimize hazards to humans, pets, other domestic animals, and nontarget organisms and to minimize runoff
  • Types of environments traversed by rights-of-way
  • Recognition of target pests.
Examination sources

Washington Laws and Safety

Format
Closed-book written examination
Passing score
70 percent
Examination outline
  • Knowledge of the state and federal laws governing pesticide use
  • General pesticide label comprehension to include
    • General format and terminology of pesticide labels and labeling
    • Understanding instructions, warnings, terms, symbols, and other information commonly appearing on pesticide labels and labeling
    • Understanding that it is a violation of state and federal law to use any pesticide in a manner inconsistent with its labeling
    • Understanding labeling requirements that a certified applicator must be physically present at the site of application
    • Understanding labeling requirements for supervising noncertified applicators working under the direct supervision of a certified applicator
    • Understanding that applicators must comply with all use restrictions and directions for use listed on the pesticide label and labeling, including being certified in the appropriate license classification
    • Understanding the meaning of product classification as either general or restricted use
    • Understanding and complying with notification requirements specific to the product
    • Recognizing and understanding the difference between mandatory and advisory labeling language.
  • Safe use of pesticides to avoid or minimize adverse health effects including
    • Understanding the difference between acute and chronic toxicity
    • Understanding that a pesticide's risk is a function of exposure and the pesticide's toxicity
    • Understanding the different routes of exposure and how they may occur
    • Common types and causes of pesticide mishaps
    • Precautions to prevent injury to applicators and other individuals in or near treated areas
    • The need for, and proper use of, protective clothing and personal protective equipment
    • Symptoms of pesticide poisoning
    • First aid and other procedures to be followed in case of a pesticide mishap
    • Proper identification, storage, transport, handling, mixing procedures, and disposal methods for pesticides and used pesticide containers, including precautions to be taken to prevent children from having access to pesticides and pesticide containers.
  • Environmental fate of pesticides and the potential consequences of the use and misuse of pesticides including the influence of the following
    • Weather and other climatic conditions
    • Types of terrain, soil, or other substrate
    • Presence of fish, wildlife, and other nontarget organisms
    • Drainage patterns.
  • Proper identification and effective control of pests including the following
    • Importance of correctly identifying target pests and selecting the proper pesticide product for effective pest control
    • Verifying that the label does not prohibit the use of the product to control the target pest.
  • Characteristics of pesticides including the following
    • Types of pesticides and pesticide formulations
    • Compatibility, synergism, persistence, and animal and plant toxicity of the formulations
    • Hazards and residue associated with use
    • Factors that influence effectiveness or lead to problems such as pesticide resistance
    • Dilution procedures.
  • Application equipment including the following
    • Types of equipment and advantages and limitations of each
    • Use, maintenance, and calibration procedures.
  • Selecting appropriate application methods including the following
    • Methods to apply various forms and formulations of pesticides
    • Knowledge of which application method to use in a given situation and that certain uses require additional certification
    • How selection of application method and use of a pesticide may or may not result in proper use
    • Prevention of drift and pesticide loss into the environment.
  • Knowledge of the responsibilities of certified applicators supervising noncertified applicators including the following
    • Understanding and complying with requirements in WAC 16-228-1548 for certified applicators who supervise noncertified applicators using pesticides for those pesticide licenses listed in this subsection
    • Recordkeeping requirements of pesticide safety training for noncertified applicators who use pesticides under the direct supervision of a certified applicator
    • Providing use-specific instructions to noncertified applicators using pesticides under the direct supervision of a certified applicator
    • Explaining pertinent state, tribal, and federal laws and regulations to noncertified applicators who use pesticides under the direct supervision of a certified applicator.
  • Understanding the importance of professionalism including the following
    • Maintaining chemical security for pesticides
    • How to communicate information about pesticide exposure and risks with customers and the public
    • Appropriate product stewardship for certified applicators.
Examination sources

Washington Private Applicator examination (pesticides)

Format
Closed-book written examination
Passing score
70 percent
Examination outline
  • Knowledge of the state and federal laws governing pesticide use including understanding the Worker Protection Standard in WAC 16-228-233.
  • General pesticide label comprehension to include
    • General format and terminology of pesticide labels and labeling
    • Understanding instructions, warnings, terms, symbols, and other information commonly appearing on pesticide labels and labeling
    • Understanding that it is a violation of state and federal law to use any pesticide in a manner inconsistent with its labeling
    • Understanding when a certified applicator must be physically present at the site of application based on labeling requirements
    • Understanding labeling requirements for supervising noncertified applicators working under the direct supervision of a certified applicator
    • Understanding that applicators must comply with all use restrictions and directions for use listed on the pesticide label and labeling, including being certified in the appropriate license classification
    • Understanding the meaning of product classification as either general or restricted use
    • Understanding and complying with notification requirements specific to the product
    • Recognizing and understanding the difference between mandatory and advisory labeling language.
  • Safe use of pesticides to avoid or minimize adverse health effects including
    • Understanding the difference between acute and chronic toxicity
    • Understanding that a pesticide's risk is a function of exposure and the pesticide's toxicity
    • Understanding the different routes of exposure and how they may occur
    • Common types and causes of pesticide mishaps
    • Precautions to prevent injury to applicators and other individuals in or near treated areas
    • The need for and proper use of protective clothing and personal protective equipment
    • Symptoms of pesticide poisoning
    • First aid and other procedures to be followed in case of a pesticide mishap
    • Proper identification, storage, transport, handling, mixing procedures, and disposal methods for pesticides and used pesticide containers including precautions to be taken to prevent children from having access to pesticides and pesticide containers.
  • Environmental fate of pesticides and the potential consequences of the use and misuse of pesticides including the influence of the following
    • Weather and other climatic conditions
    • Types of terrain, soil, or other substrate
    • Presence of fish, wildlife, and other nontarget organisms
    • Drainage patterns.
  • Proper identification and effective control of pests including the following
    • Importance of correctly identifying target pests and selecting the proper pesticide product for effective pest control
    • Verifying that the label does not prohibit the use of the product to control the target pest.
  • Characteristics of pesticides including the following
    • Types of pesticides and pesticide formulations
    • Compatibility, synergism, persistence, and animal and plant toxicity of the formulations
    • Hazards and residues associated with use
    • Factors that influence effectiveness or lead to problems such as pesticide resistance
    • Dilution procedures.
  • Application equipment including the following
    • Types of equipment and the advantages and limitations of each type
    • Use, maintenance, and calibration procedures.
  • Selecting appropriate application methods including the following
    • Methods to apply various forms and formulations of pesticides
    • Knowledge of which application method to use in a given situation and that certain uses require additional certification
    • How selection of application method and use of a pesticide may or may not result in proper use
    • Prevention of drift and pesticide loss into the environment.
  • Knowledge of the responsibilities of certified applicators supervising noncertified applicators including the following
    • Understanding and complying with requirements in WAC 16-228-1548 for private applicators who directly supervise noncertified applicators using restricted use pesticides
    • Providing use-specific instructions to noncertified applicators using pesticides under the direct supervision of a certified applicator
    • Explaining appropriate state, tribal, and federal laws and regulations to noncertified applicators working under the direct supervision of a certified applicator.
  • Understanding the importance of stewardship including the following
    • Maintaining chemical security for restricted use pesticides
    • How to communicate information about pesticide exposures and risks with agricultural workers, handlers, and other individuals.
  • Practical knowledge of pest control applications to agricultural commodities including the following
    • Specific pests of relevant agricultural commodities
    • How to avoid contamination of ground and surface waters
    • Understanding preharvest and restricted entry intervals and other entry-restricted periods and areas
    • Understanding specific pesticide toxicity and residue potential when pesticides are applied to animal or animal product agricultural commodities
    • Relative hazards associated with using pesticides on animals or places in which animals are confined based on formulation, application technique, age of animal, stress, and extent of treatment.
Examination sources

C&T Quiz for Reciprocal Applicants

Format
Open-book scored online quiz
Exam questions
10
Examination outline
  • Private Applicator Part 1
    • Requirements for applicators making space fumigation or aerial applications
    • Product specific notification requirements
  • Private Applicator Part 2
    • Requirement to provide use‐specific instructions to noncertified applicators using restricted use pesticides (RUPs) under the direct supervision of a certified applicator
    • Relative hazards associated with using pesticides on animals or places in which animals are confined
    • Product-specific notification requirements
  • Laws and Safety Part 1
    • Mandatory vs advisory labelling language
  • Laws and Safety Part 2
    • Know how to communicate information about pesticide exposures and risks with customers and the public
    • Appropriate product stewardship for certified applicators
  • Demonstration and Research
    • Demonstration and Research category as well as the other categories relevant to the kinds of work
  • Insect & Disease Control
    • Pre-Harvest Interval (PHI)
    • Restricted-entry Interval (REI)
  • Weed Control
    • Phytotoxicity
  • Soil Fumigation
    • Pre-application inspection of application equipment
    • Identifying pests causing the damage and verifying they can be controlled with soil fumigation
    • Understanding the relationship between pest density and application rate
    • The importance of proper application depth and timing
  • Vertebrate Pest/PCO General
    • Pests associated with agricultural lands
    • Potential for pesticide persistence
    • Limit water contamination and exposure to non-target organisms
    • Rights-of-Way Environments
    • Labels
  • Space Fumigation
    • Fumigant labels
    • Buffer zones
    • First aid measures to take in the event of exposure to a fumigant
    • Conducting pre‐application inspection of application equipment and the site to be fumigated
    • Fumigant Management Plans (FMPs)
    • Post-Applicator Summary (PAS)
Examination sources

Soil Fumigation

Format
Closed-book written examination
Exam questions
60
Time limit
2 hour(s)
Passing score
70 percent
Examination outline
  • Familiarity with the pesticide labels and labeling for products used to perform soil fumigation including the following
    • Labeling requirements specific to soil fumigants
    • Requirements for certified applicators of fumigants, fumigant handlers and permitted fumigant handler activities, and the safety information that certified applicators must provide to noncertified applicators
    • Entry-restricted period for different tarped and untarped field application scenarios
    • Recordkeeping requirements imposed by product labels and labeling
    • Labeling provisions unique to products containing active ingredients.
  • Measures to minimize adverse health effects including the following
    • Understanding how certified applicators, noncertified applicators using fumigants under the direct supervision of certified applicators, field workers, and bystanders can become exposed to fumigants
    • Common problems and mistakes that can result in direct exposure to fumigants
    • Signs and symptoms of human exposure to fumigants
    • Air concentrations of a fumigant that require that applicators wear respirators or exit the work area entirely
    • Steps to take if a fumigant applicator experiences sensory irritation
    • Understanding air monitoring, when it is required, and where and when to take samples
    • Buffer zones including procedures for buffer zone monitoring and who is permitted to be in a buffer zone
    • First aid measures to take in the event of exposure to a soil fumigant
    • Labeling requirements for transportation, storage, spill clean-up, and emergency response for soil fumigants including safe disposal of containers and contaminated soil and management of empty containers.
  • Characteristics of soil fumigants including the following
    • Chemical characteristics of soil fumigants
    • Specific human exposure concerns for soil fumigants
    • How soil fumigants change from a liquid or solid to a gas
    • How soil fumigants disperse in the application zone
    • Compatibility concerns for tanks, hoses, tubing, and other equipment.
  • Selecting appropriate application methods and timing including the following
    • Application methods including, but not limited to, water-run and nonwater-run applications and equipment commonly used for each soil fumigant
    • Site characteristics that influence fumigant exposure
    • Understanding temperature inversions and their impact on soil fumigant application
    • Weather conditions that could impact timing of soil fumigant application and labeling statements limiting applications during specific weather conditions
    • Conducting preapplication inspection of application equipment
    • Understanding the purpose and methods of soil sealing including the factors that determine which soil sealing method to use
    • Understanding the use of tarps including the range of tarps available, how to seal tarps, and labeling requirements for tarp removal, perforation, and repair
    • Calculating the amount of product required for a specific treatment area
    • Understanding the basic techniques for calibrating soil fumigant application equipment.
  • Soil and pest factors that influence fumigant activity including the following
    • Influence of soil factors on fumigant volatility and movement within the soil profile
    • Factors that influence gaseous movement through the soil profile and into the air
    • Soil characteristics including how soil characteristics affect the success of a soil fumigation application, assessing soil moisture, and correcting soil characteristics that could hinder a successful soil fumigation application
    • Identifying pests causing the damage and verifying they can be controlled with soil fumigation
    • Understanding the relationship between pest density and application rate
    • The importance of proper application depth and timing.
  • Understanding what personal protective equipment is necessary and how to use it properly including the following
    • Following labeling directions for required personal protective equipment
    • Selecting, inspecting, using, caring for, replacing, and disposing of personal protective equipment
    • Understanding the types of respirators required when using specific soil fumigants and how to use them properly including medical evaluation, fit testing, and required replacement of cartridges and canisters
    • Labeling requirements and other laws applicable to medical evaluation for respirator use, fit tests, training, and recordkeeping.
  • Information about fumigant management plans including the following
    • When a fumigant management plan must be in effect, how long it must be kept on file, where it must be kept during the application, and who must have access to it
    • The elements of a fumigant management plan and resources available to assist the applicator in preparing a fumigant management plan
    • The person responsible for verifying that a fumigant management plan is accurate
    • The elements, purpose, and content of a post-application summary, who must prepare it, and when it must be completed.
  • Understanding buffer zones and posting requirements including the following
    • Buffer zones and the buffer zone period
    • Identifying who is and is not allowed in a buffer zone during the buffer zone period
    • Using the buffer zone table from the labeling to determine the size of the buffer zone
    • Factors that affect buffer zone size and calculating buffer zones based on those factors
    • Distinguishing between buffer zone posting and treated area posting including the preapplication and post-application posting time frames for each
    • Proper choice and placement of warning signs.
Examination sources

Space Fumigation

Format
Closed-book written examination
Exam questions
55
Time limit
1 hour(s)
Passing score
70 percent
Examination outline
  • Familiarity with the pesticide labels and labeling for products used to perform space fumigation including labeling requirements specific to space fumigants
  • Measures to minimize adverse health effects including the following
    • Understanding how certified applicators, noncertified applicators using fumigants under the direct supervision of certified applicators, and bystanders can become exposed to fumigants
    • Common problems and mistakes that can result in direct exposure to fumigants
    • Signs and symptoms of human exposure to fumigants
    • Air concentrations of a fumigant that require applicators to wear respirators or to exit the work area entirely
    • Steps to take if a fumigant applicator experiences sensory irritation
    • Understanding air monitoring, when it is required, and where and when to take samples
    • Buffer zones including procedures for buffer zone monitoring and who is permitted to be in a buffer zone
    • First aid measures to take in the event of exposure to a fumigant
    • Labeling requirements for transportation, storage, spill clean-up, and emergency response for space fumigants including safe disposal of containers and contaminated materials, and management of empty containers.
  • Characteristics of space fumigants including the following
    • Chemical characteristics of space fumigants
    • Specific human exposure concerns for space fumigants
    • How fumigants change from a liquid or solid to a gas
    • How fumigants disperse in the application zone
    • Compatibility concerns for tanks, hoses, tubing, and other equipment.
  • Selecting appropriate application methods commonly used for space fumigation
    • Application methods and equipment commonly used for space fumigation
    • Site characteristics that influence fumigant exposure
    • Conditions that could impact timing of space fumigant application such as air stability, air temperature, humidity, and wind current, and labeling statements limiting applications under specific conditions
    • Conducting preapplication inspection of application equipment and the site to be fumigated
    • Understanding the purpose and methods of sealing the area to be fumigated including the factors that determine which sealing method to use
    • Calculating the amount of product for a specific treatment area
    • Understanding the basic techniques for calibrating space fumigant application equipment
    • Understanding when and how to conduct air monitoring and when it is required.
  • Pest factors that influence fumigant activity including the following
    • Influence of pest factors on fumigant volatility
    • Factors that influence gaseous movement through the area being fumigated and into the air
    • Identifying pests causing the damage and verifying they can be controlled with fumigation
    • Understanding the relationship between pest density and application rate
    • The importance of proper application rate and timing.
  • Understanding what personal protective equipment is necessary and how to use it properly including the following
    • Following label directions for required personal protective equipment
    • Selecting, inspecting, using, caring for, replacing, and disposing of personal protective equipment
    • Understanding the types of respirators required when using specific space fumigants and how to use them properly including medical evaluation, fit testing, and required replacement of cartridges and canisters
    • Labeling requirements and other laws applicable to medical evaluation for respirator use, fit tests, training, and recordkeeping.
  • Information about fumigant management plans and when they are required including the following
    • When a fumigant management plan must be in effect, how long it must be kept on file, where it must be kept during the application, and who must have access to it
    • The elements of a fumigant management plan and resources available to assist the applicator in preparing a fumigant management plan
    • The person responsible for verifying that a fumigant management plan is accurate
    • The elements, purpose, and content of a post-application summary, who must prepare it, and when it must be completed.
  • Understanding posting requirements including the following
    • Understanding who is and is not allowed in an area being fumigated or after fumigation
    • Distinguishing fumigant label-required posting and treated area posting including the preapplication and post-application posting time frames for each
    • Proper choice and placement of warning signs.
Examination sources

Weed Control

Format
Closed-book written examination
Exam questions
65
Time limit
2 hour(s)
Passing score
70 percent
Examination outline
  • Crops, grasslands, noncrop agricultural lands, ornamental plants, turf, and right-of-way areas (terrestrial and aquatic), and weed pests associated with those areas
  • Preharvest or restricted entry intervals and other entry-restricted periods and areas
  • Potential for phytotoxicity due to a wide variety of plants and pests to be controlled, drift, persistence beyond the intended period of pest control, environmental contamination, nontarget exposure, and other problems resulting from the use of pesticides to control weeds including run-off, drift, and excessive foliage destruction
  • Application methods to minimize hazards to humans, pets, other domestic animals, and nontarget organisms
  • Recognition of target pests.
Examination sources

Aquatic Pest Control

Format
Closed-book written examination
Exam questions
50
Time limit
2 hour(s)
Passing score
70 percent
Examination outline
  • The characteristics of various aquatic use situations
  • The potential for adverse effects on nontarget organisms, beneficial insects, and other organisms in the immediate aquatic environment and downstream
  • The principles of limited area application.
Examination sources