Agricultural: Plant and Animal Pest Control
Crops, livestock, and the Worker Protection Standard
The agricultural category covers field and specialty crops and animal production, plus the federal Worker Protection Standard (WPS). WPS applies where pesticides are used on farms, forests, nurseries, and greenhouses with employees: handler training and PPE, decontamination supplies, notification (oral or posted), and the restricted-entry interval (REI). Workers cannot enter during an REI except under the early-entry rules, which require label-specified PPE.
Know IPM as an exam topic: scouting, economic thresholds, resistance management by rotating mode-of-action groups, and calibration. Calibration is the most testable skill. For a broadcast boom:
GPA = (5940 × GPM) / (MPH × nozzle spacing in inches)
Worked example: a 0.2 GPM nozzle on 20-inch spacing at 4 mph gives (5940 × 0.2) ÷ (4 × 20) = 1188 ÷ 80 ≈ 14.9 GPA.
Livestock: honor withdrawal periods and residue tolerances, and never treat animals, barns, or milk rooms with a product not labeled for that site. Protect feed, water, and apiaries from drift and spills.
Traps: confusing PHI with REI; assuming a product labeled on field corn is legal on sweet corn (the crop and site must be listed); forgetting that surfactants and tank mixes change phytotoxicity; and thinking a reduced rate is always safer - sublethal rates drive resistance.