General Standards, Category Exams, and Testing Rules
Key Takeaways
- TDA agricultural applicator applicants schedule exams with Metro only after TDA processes the application and issues an eligibility letter with a TDA account number.
- Commercial, noncommercial, and NCPS licenses require passing General Standards plus at least one category exam; aerial certification does not count as the standalone category.
- The General Standards exam is the broad core exam: labels, safety, PPE, environment, formulations, equipment, pest management, and laws.
- Category exams limit the license to the kind of work performed, such as field crop, aquatic, vegetation management, right-of-way, public health vector, or soil fumigation.
The testing sequence
For agricultural pesticide licensing, Texas uses a two-step administrative sequence. The candidate applies to TDA and pays the license fee first. After TDA processes the application, the candidate receives an eligibility letter with a unique TDA account number.
That eligibility letter is the key to Metro Institute scheduling. Beginning May 19, 2025, TDA agricultural pesticide applicator exams are administered by Metro. Candidates use the TDA account number to register for exams at available Texas testing locations.
A common exam trap is treating an eligibility letter as a license. It is not. It means TDA has processed the application far enough for testing. The license is issued only after the required exams and other licensing criteria are satisfied.
General Standards plus category
Commercial, noncommercial, and NCPS agricultural applicants must pass General Standards and at least one category exam. General Standards is the core body of law and safe-use knowledge. The category exam ties the credential to the work site, method, or pest-control setting.
TDA specifically notes that aerial application, category 9, does not count as a category by itself. An aerial applicator must also hold another category that matches the actual application, such as field crop, vegetation management, aquatic, or public health pest control.
What General Standards tests
EPA's federal certification standards describe the core knowledge commercial applicators must show. Texas builds state law and TDA procedures on top of that foundation.
| Core area | What to study for Texas questions |
|---|---|
| Label comprehension | Use sites, rates, PPE, restricted-entry intervals, storage, disposal, and enforceable directions |
| Safety | Signal words, routes of exposure, first aid, emergency response, and personal protective equipment |
| Environment | Drift, water protection, endangered species bulletins, pollinators, and sensitive sites |
| Pest management | Pest identification, integrated pest management, thresholds, and resistance management |
| Formulations and equipment | Concentrates, wettable powders, nozzles, calibration, mixing, and cleanup |
| Laws and rules | FIFRA, Texas Agriculture Code Chapter 76 concepts, TDA categories, records, CEUs, and supervision |
Because the core exam is broad, do not study Texas law as a separate island. A scenario may combine a label rule with TDA licensing. For example, a licensed applicator cannot ignore a wind limit just because the application is in a permitted county.
Major TDA agricultural categories
Texas agricultural categories include several subcategories under agricultural pest control: field crop; fruit, nut, and vegetable; pasture and rangeland; vertebrate pest; farm commodity pest control; animal health; citrus; livestock protection collar; and M-44.
Other categories include forest pest control, lawn and ornamental pest control, seed treatment, vegetation management, aquatic pest control, demonstration and research, regulatory pest control, aerial application, soil fumigation, public health pest control for vector control, and border mosquito control along the U.S.-Mexico border counties.
Category choice matters because the license is not a blank check. A person who passes General Standards and aquatic pest control has not thereby qualified for soil fumigation. A person who adds aerial application still needs a category tied to the target site or pest-control work.
Use the pest, site, and method in the stem to choose the category. Mosquito larvicide in public-health work points toward public health pest control or border mosquito control when the county setting fits. Herbicide on roadsides, pipelines, drainage areas, or utility corridors points toward vegetation management. Pesticides in lakes, ponds, canals, or adjacent riparian areas when water is present point toward aquatic pest control.
Some categories also carry extra training or label sensitivity. Livestock protection collar and M-44 work involve predator-control devices and TDA-mandated training. Soil fumigation, aerial application, and public health vector work tend to test safety and drift details because the consequences of a mistake are broader than a routine ground application.
Passing score and exam logistics
TDA/Metro testing materials identify 70 percent or higher as the passing score. Metro provides results at the testing center and sends scores to TDA. At the time checked, TDA materials listed a $64 fee per exam attempt and a 24-hour wait before a repeat exam.
Failed attempts are not licensing failures by themselves, but they delay issuance. The candidate still needs every required passing score within the active application window. If General Standards is passed but the category is failed, the missing category keeps the license from covering regulated work in that category.
Adding a category after licensure follows a narrower path. A current license holder can use the TDA account number to schedule the additional Metro category exam. Passing a new category expands the license scope only for that category; it does not retroactively legalize applications made before the category was added.
Fees, vendor procedures, and testing availability are operational details that can change, so use the current TDA and Metro instructions when actually scheduling. For exam prep, remember the tested structure: TDA application, eligibility letter, Metro exam scheduling, passing score, then license issuance after all criteria are met.
Scenario traps
- Core only is incomplete for commercial, noncommercial, and NCPS licensing.
- Aerial only is incomplete because category 9 must be paired with another category.
- Training optional applies to agricultural commercial, noncommercial, and NCPS applicants, not private applicators.
- Private applicator training must happen before the private applicator application and exam path.
- Category scope follows the work, not the employer's preference.
If a question gives you a candidate timeline, put the steps in order. If it gives you a job description, pick the category. If it gives you a score, compare it with 70 percent and decide whether the candidate passed.
A candidate applying for an agricultural commercial license has passed General Standards and the aerial application exam. The candidate plans to apply herbicides from an aircraft for highway vegetation management. What is still missing before the license can cover that work?