Pesticide licence in Iowa: categories, exam and renewal

This page reports what the official source says. It is not legal advice: ask the office named here. The source is the Iowa Department of Agriculture and Land Stewardship, Pesticide Bureau, which certifies applicators and licenses the companies they work for. The parent page, pesticide licences by country, has the national background.

At a glance

Item	What the department says
Agency	Iowa Department of Agriculture and Land Stewardship, Pesticide Bureau
Licence for work for hire	The applicator is certified and the company is licensed; the company license is annual, with a fee of not more than US$25 set by statute
Category for trees and turf	Ornamental and turf pest control, with subcategories Ornamental and turf, Turf, Ornamental and Greenhouse
Exam	One exam for each category or subcategory, online or at test sites; oral exams ended January 1, 2026; fee for commercial certification not on the pages read
Recertification	Certification runs to December 31 of the third year; pass an exam or attend two hours of approved instruction each year
Minimum age	18 for a commercial applicator
Insurance or bond	Bond, liability policy or letter of credit of at least US$100,000 for property damage and for public liability, or US$100,000 per occurrence and US$300,000 annual aggregate

How the system is split

The department's applicator licensing and certification page says the pesticide applicator is certified and the pesticide company is licensed, and that both are handled through an online portal. Under rule 21.45.22 of the Iowa Administrative Code, nobody may apply pesticides to the land or property of another without being licensed and certified by the secretary of agriculture. Iowa Code section 206.6 says the secretary will not issue a commercial applicator license until the person running the business, and each employee who applies pesticides, has passed an examination for the classifications applied for. Renewal of the company license depends on all of its applying staff being certified.

The category that covers trees and turf

The rule lists a category called Ornamental and turf pest control, for people who use or supervise pesticides to control pests in the maintenance and production of ornamental plants and turf grass. It has four subcategories. Ornamental and turf pest control covers ornamental trees, shrubs, flowers and turf, including around structures except greenhouses, plus nurseries, golf courses, athletic fields and public or private grounds. Turf pest control covers turf grasses only. Ornamental pest control covers trees, shrubs, flowers and other ornamental plants except turf, outside greenhouses. Greenhouse pest control covers plants grown in greenhouses and other enclosed climate-controlled places. Forest pest control and right-of-way pest control are separate categories. The rule says a separate exam must be passed for each category or subcategory.

Exam

The department's page says applicator exams are given online, with a closed-book online proctored option for a proctoring fee, and at department test sites and college test sites. The unproctored private applicator exam allowed during Covid ended on December 31, 2025. The department's rule-change overview says the oral exam option ended with the changes effective January 1, 2026. The rule says exam scores are kept as valid for a maximum of one year while certification requirements or fees are outstanding. Commercial applicators must be at least 18 years old. Study manuals are sold through the Iowa State University Extension store, according to the department's overview.

Renewal and recertification

Rule 21.45.22 says a commercial applicator's license classification expires every December 31 and is renewed on payment of the license fee. The certification itself lasts three years and expires on December 31 of the third year. To renew, the applicator passes an exam in the third year or attends two hours of approved continuing instruction in each year of the cycle. A two-hour course can be approved for more than one category. Credits cannot be carried from one year to another. The licensee keeps the certificates of completion on file for the previous and current cycle, and the department can inspect them. Someone who misses the two hours must pass an exam before recertification.

Supervised workers

The rule lets a new employee apply general use products for 21 days from the first day of employment under the direct supervision of a certified applicator, who must be in sight or hearing distance. For restricted use products, the department's overview says a noncertified applicator must be at least 18, meet the qualification requirements, and work under direct supervision, and that supervisors keep detailed records for 2 years.

Insurance

On financial responsibility the statute, Iowa Code section 206.13, says the department will not issue a commercial applicator license until the applicant shows evidence of financial responsibility: a surety bond, a liability insurance policy or an irrevocable letter of credit. The amount is not less than US$100,000 for property damage and US$100,000 for public liability, each separately, or liability insurance with limits of US$100,000 per occurrence and US$300,000 annual aggregate. Damage to crops, plants or land being worked on need not be covered. The department must be told 10 days before a bond or policy is reduced or cancelled.

Reciprocity

None of the Iowa pages read on October 8, 2026 state a reciprocity rule. Missouri's department lists Iowa among the states it has a formal agreement with, as described on the Missouri pesticide licence page.