Sources & verification
Our practice content is written from public competency standards and state rules — never from copyrighted manuals or real exam items. Here's the registry behind it.
Questions are authored from public-domain federal competency standards (40 CFR Part 171), public U.S. EPA materials, and the Texas Administrative Code. Copyrighted study manuals (AgriLife AES series, the PERC core manual) are linked for your reference but are never copied. Every source carries an edition and a last-verified date.
| Source | Edition | Verified | Use |
|---|---|---|---|
| 40 CFR Part 171 — Certification of Pesticide Applicators U.S. Government (eCFR) | Current eCFR | 2026-06-15 | Public (U.S. gov work) |
| National Pesticide Applicator Certification Core Manual U.S. EPA | 2014 | 2026-06-15 | Public (U.S. gov work) |
| Agricultural Worker Protection Standard (WPS) U.S. EPA | Current | 2026-06-15 | Public (U.S. gov work) |
| Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) summary U.S. EPA | Current | 2026-06-15 | Public (U.S. gov work) |
| Texas Administrative Code, Title 4 (Agriculture) — TDA pesticide rules Texas Secretary of State / Texas Department of Agriculture | Current | 2026-06-15 | Public domain |
| TDA — Commercial & Noncommercial Pesticide Applicator Licensing Texas Department of Agriculture | 2025 | 2026-06-15 | Linked, not reproduced |
| TDA — Private Applicator License Texas Department of Agriculture | 2025 | 2026-06-15 | Linked, not reproduced |
| Step-by-Step: Commercial or Non-Commercial Applicator License Texas A&M AgriLife Extension (PSEP) | Jul 2025 | 2026-06-15 | Linked, not reproduced |
| Metro Institute — Texas pesticide applicator exam information Metro Institute (TDA-contracted testing vendor) | 2025 | 2026-06-15 | Linked, not reproduced |
| National Pesticide Applicator Certification Core Manual, 3rd Edition Pesticide Educational Resources Collaborative (PERC) | 3rd Edition (2025) | 2026-06-15 | Not reproduced (copyrighted) |