California agricultural pest control adviser license: prepare the PCA route

Decide whether the PCA role matches your work

Three criteria from FAC section 11410 decide whether an activity is acting as a PCA: offering a recommendation on agricultural use to a third party, holding oneself forth to a third party as an authority on agricultural use, and soliciting services or sales outside a fixed place of business for agricultural use.

The definition assumes the recommendation is distributed outside the firm or agency to a third party. A person does not give advice to themself, or to the operator of the property itself.

Under 3 CCR section 6551, a person employed by a federal, state, county or local public agency who gives that agency recommendations on any agricultural use must hold a valid PCA license, unless FAC section 12001 exempts the work. DPR’s September 15, 2026 clarification applies this rule to agricultural-use decisions on public agency property.

DPR adopted 3 CCR section 6551 in 2005. Its 2026 letter 26-16 explains the intent of that section and clarifies how FAC sections 11410, 11411, 12001, 12003 and 12004 apply to agricultural-use pest control decisions on public agency property.

Recommendations for biological control agents count as agricultural recommendations. These agents include predatory insects, parasitic wasps, pathogenic fungi and viruses.

If your role is unclear, describe the actual activity and audience to DPR before applying: what advice you give, who receives it, whether you advise outside clients or work within one farm or agency, and which exemption you think applies. Ask DPR to confirm the route for that exact situation.

Exemptions from the PCA license

DPR lists these exemptions:

• Officials of federal, state and county departments of agriculture, and University of California personnel engaged in duties related to agricultural use, if the recommendation is put in writing (FAC section 12001).
• Owners and their employees at private firms, such as growers and golf courses, who make pesticide decisions on their own property.
• Individuals within an established place of business who only write sales invoices or receipts or handle over-the-counter sales where no recommendation is made or inferred.
• Registered professional foresters giving silvicultural advice. A forester whose silvicultural prescription specifies pesticides must be licensed as a PCA.
• Individuals who recommend seed treatment and own or work for a firm in the business of treating seed.

Qualification routes

A new applicant meets one of three minimum educational requirements under 3 CCR section 6550:

1. A bachelor's degree in agricultural sciences, biological sciences, natural sciences or pest management, plus the core course requirements.
2. A degree from an accredited doctoral program in agricultural sciences, biological sciences, natural sciences or pest management.
3. The core course requirements plus 24 months of technical experience working in an agricultural capacity related to pest management.

The core course requirements are 42 semester units or 63 quarter units of college-level courses in the physical and biological sciences, crop health, pest management systems and methods, and production systems, with a 2.0 grade point average in all core courses.

Before filling in form PR-PML-085, compare your transcript with those course areas and check that the grade point average across the core courses reaches 2.0. Gather official transcripts, course documentation and employment records in one place first.

Application and exams

A PCA applicant submits all of these:

1. The Agricultural Pest Control Adviser License Application, form DPR-LIC-084.
2. The Core Course and/or Work Experience Requirements for New License Applicants form (PR-PML-085), with a copy of official college transcripts, documentation of courses and/or employment records.
3. An initial application fee.
4. An examination fee for each examination requested.
5. A passing result on the Laws, Regulations and Basic Principles examination, which includes integrated pest management principles, and on at least one category examination.

Applications for a new license include a copy of valid government-issued documentation showing the applicant will meet the minimum age of 18 before admission to the exam. The name on the application must match the name on that documentation.

DPR offers computer-based exams at testing centers statewide. The exams are based on the Knowledge Expectations on DPR’s website, in the Agricultural Pest Control Advisor section.

The Licensing and Certification Program answers at LicenseMail@cdpr.ca.gov and (916) 445-4038.

Study the Knowledge Expectations for each exam you plan to take, and decide your category exams before you complete the application. Take the name, birth date and contact details from your identity documents so they match. Check DPR’s current fee schedule and instructions before you pay.

Sections of form LIC-084

LIC-084 (revision 07/24) has sections A to I:

• A Application type: new application, reexamination after a failed exam or no-show, or added categories.
• B Applicant information, including the adviser number of an existing license.
• C The Laws, Regulations and Basic Principles examination.
• D Examination categories.
• E Examination schedule: a first and second choice of month and location. DPR assigns the exam date, and the date and location choices are not guaranteed.
• F Reasonable accommodation to take an exam.
• G Fees: the application fee, the Laws, Regulations and Basic Principles examination fee and the category examination fees, listed by amount, number of exams and total amount. All fees are non-transferable and non-refundable.
• H Disciplinary questions: whether, during the last three years, any administrative, civil or criminal action for violating pesticide laws resulted in discipline or is pending.
• I A declaration under penalty of perjury that the information is true, with signature and date.

The mailing address on the application is the applicant’s address of record for the license.

Choose the mailing address with that in mind. If you need a reasonable accommodation in Section F, ask DPR for its current process and supporting-document requirements.

Exam categories

FAC section 12022 sets the categories under the PCA license:

• A. Insects, Mites and Other Invertebrates
• B. Plant Pathogens
• C. Nematodes
• D. Vertebrate Pests
• E. Weed Control
• F. Defoliation
• G. Plant Growth Regulators

Choose the categories that match the advice you will actually give. If you plan to advise on both insects and weeds, for example, list both subjects instead of assuming one passed category covers every recommendation. Before you offer a new service, write down the crop, the target problem, the recommendation and who receives it. If the service is growth regulation or defoliation rather than ordinary pest control, say so explicitly and match it to the right category.

Pest control advisor test

The pest control advisor test is taken per category: insects and mites, plant pathogens, nematodes, vertebrate pests, weed control, defoliation and plant growth regulators, as set by FAC section 12022. Register for the categories that match the advice you give.

After licensing

An adviser keeps the license active with these duties:

• At least 40 hours of approved continuing education every two years before renewal. Four of the 40 hours cover pesticide laws and regulations (3 CCR section 6511(e)).
• Annual registration with the county agricultural commissioner (CAC) in the home county, which is the address on the PCA license, and in each county where recommendations are made. An adviser whose address is outside California registers in a county of occupational choice (FAC section 12031).
• Recommendations that do not conflict with label requirements (FAC section 12971).
• One copy of each written recommendation kept for one year after its date (FAC section 12004).

An adviser shall not make, or offer to make, an agricultural use recommendation in any county without first registering with the CAC. The registration is required annually (FAC sections 12002 and 12033).

Keep a list of the counties where you plan to advise and the registration status of each one. Ask each county agricultural commissioner’s office about its registration process and local instructions.

What a written recommendation contains

Each written recommendation lists the operator and location of the property, the commodity, crop or site to be treated, the pest by accepted common name, and the name of each pesticide.

It states the dosage or method, the concentration and volume of the mix per acre, the total acreage or units treated, and the schedule, time or conditions of the treatment. It gives the applicable restricted entry interval and the preharvest or preslaughter interval; the phrase “preharvest interval – see label” is inadequate.

It also gives the criteria for the need for treatment, such as pest count, history of infestation or preventative measures. It carries a certification that alternatives and mitigation were considered and, if feasible, adopted. The adviser’s signature or mark, the date, the address and the name of the business represented complete it.

The adviser provides the operator of the property, the pesticide dealer and the applicator with a copy before the application (FAC section 12003).

A recommendation for a nonfumigant high-VOC product must not recommend a use in violation of 3 CCR section 6884, and when it relies on the exemption under 6884(b) it identifies that exemption. The PCA keeps a copy of these recommendations for two years (3 CCR section 6558).

Hazards known to exist

Each recommendation includes, when applicable, a warning of damage that should reasonably have been known to exist when it was made, including crop rotation, crop disposition and plant-back restrictions. Advisers are responsible for familiarizing themselves with the area around the intended application site. When a condition is known to exist that could result in damage, advisers must include it in their written recommendations.

DPR gives these examples of conditions: adjacent crops for which the recommended pesticide is not registered and which have no tolerance established; labor-intensive crops at or near a stage where field crews may be in the field; apiaries within or adjacent to the treatment area; bodies of water, including water return systems; buildings, including residences, businesses and schools; domestic animals, livestock, and wildlife nesting and grazing areas.

Next step

The California applicator license and the exam preparation guide cover the related credentials.