IN Pesticide Applicator
Indiana Pesticide Applicator Certification
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ExploreAbout this exam
Indiana pesticide applicator certification is administered under the agricultural laws overseen by the Office of Indiana State Chemist (OISC), the agency charged with administering several agricultural laws involving animal feeds, fertilizers, pesticides and seeds. Certification is for people who apply or supervise the application of pesticides - private applicators treating their own or their employer's land, and commercial or public applicators who apply for compensation or as part of their job duties. The exam is organized into four domains of roughly equal weight: pesticide laws and regulations; pesticide labeling and safety; pest identification and control; and application equipment and calibration. Preparation should combine a careful read of the current product label with the state regulatory material and hands-on calibration practice with the equipment you actually use. Work through the law and labeling domains first, since they underpin safe decision-making, then pest identification, then calibration math. Confirm current exam logistics, fees, and recertification requirements directly with OISC; this page is an independent study resource and is not affiliated with or endorsed by the Office of Indiana State Chemist or Purdue University. Note that OISC is temporarily located in AGAD at 615 W. State Street, Room 18, West Lafayette, IN 47907, and that its office is closed from December 24, 2025 to January 4, 2026, reopening January 5, 2026.
What you'll study
About IN Pesticide Applicator preparation
Who administers Indiana pesticide applicator certification?
The Office of Indiana State Chemist, located at Purdue University. OISC states that the Indiana State Chemist is charged with administering several agricultural laws involving animal feeds, fertilizers, pesticides and seeds, with goals of truth-in-labeling, food safety, user safety and environmental protection.
How is the exam structured?
It is organized around four domains of equal weight: pesticide laws and regulations, pesticide labeling and safety, pest identification and control, and application equipment and calibration. Expect each area to carry roughly a quarter of the scored content, so a weak domain is costly.
How much does the exam cost and how long is it?
This page does not state a fee, duration, question count, or passing score, and those details change over time. Verify current figures directly with OISC at 765-494-1492 before you register or budget for testing.
What is the most common reason candidates fall short?
Neglecting calibration math and label interpretation. Many candidates memorize pest facts but cannot work through a sprayer output problem or read a label's restricted-entry and rate language. Practice the arithmetic and read real labels rather than skimming summaries.
In what order should I study?
Start with laws and regulations plus labeling and safety, because they govern every later decision. Move to pest identification and integrated control, then finish with equipment and calibration, which rewards repeated practice problems. Revisit law and labeling in the final week.
How do I reach OISC with a question?
Telephone 765-494-1492 or fax 765-494-4331. The mailing address is 175 S. University Street, West Lafayette, IN 47907-2063. The office is temporarily located in AGAD, 615 W. State Street, Room 18, West Lafayette, IN 47907.
Is OISC open year-round?
No. OISC is closed from December 24, 2025 to January 4, 2026 and reopens January 5, 2026; office and staff are unavailable during that period. Plan applications and questions around that closure rather than expecting a reply.
Where can I park when visiting OISC?
Visitor paid parking is available in the Grant Street Garage and the Harrison Street Garage, according to OISC. Confirm the current office location before traveling, since OISC notes it is temporarily located in AGAD rather than its mailing address.
Is this page an official OISC or Purdue resource?
No. This is independent study material with no affiliation with or endorsement by the Office of Indiana State Chemist or Purdue University. Always confirm requirements, deadlines, and fees with OISC directly before relying on any third-party summary.