IA Pesticide Applicator cheat sheet

Integrated pest management (IPM) sequence: identify the pest, monitor with thresholds, use cultural/mechanical/biological controls first, and treat with pesticides only when the economic threshold is exceeded.

Economic threshold = pest density at which control cost equals crop loss avoided; the economic injury level is the lowest density that causes economic loss, so the threshold sits at or below it.

Key insect orders: Hemiptera (true bugs, piercing-sucking), Coleoptera (beetles, chewing), Lepidoptera (moths/butterflies; larvae chew), Diptera (flies), Orthoptera (grasshoppers, chewing), Acari (mites, not insects-8 legs).

Chewing pests damage via removed tissue (holes, skeletonizing); piercing-sucking pests cause stippling, yellowing, wilting, and honeydew/sooty mold.

Weed classification drives herbicide choice: grasses (monocots, parallel veins) vs. broadleaves (dicots, net veins); annuals vs. biennials vs. perennials determines whether root-killing or repeated control is needed.

Plant disease triangle requires a susceptible host, a virulent pathogen, and favorable environment simultaneously; breaking any leg prevents disease.

Fungi cause powdery/downy mildew, rusts, blights; bacteria cause soft rots and wilts with water-soaking; viruses cause mosaic, mottling, and stunting and are spread by vectors such as aphids.

Degree-day (DD) accumulation predicts insect life-stage timing: DD = average daily temp minus lower developmental threshold, summed over days; used to time scouting and sprays.

The label is the law: use consistent with labeling is legally binding under FIFRA; directions for use, restrictions, and PPE statements must be followed.

Signal words reflect acute toxicity: DANGER-POISON (with skull and crossbones) = Category I most toxic; DANGER = Category I; WARNING = Category II; CAUTION = Category III/IV.

Precautionary statements cover hazards to humans and domestic animals, environmental hazards (e.g., bee toxicity, groundwater advisory), and physical/chemical hazards.

Restricted-entry interval (REI) is the minimum time after application before workers may enter without PPE; it appears in the Agricultural Use Requirements box on agricultural labels.

Formulation abbreviations: EC (emulsifiable concentrate, solvent-based), WP/WDG (wettable powder/water-dispersible granule), SC (suspension concentrate), F/FL (flowable), G (granule), D (dust), S (solution).

Adjuvants modify spray mix: surfactants reduce surface tension for wetting/spreading; stickers increase adhesion; penetrants aid uptake; compatibility agents prevent mixing problems.

'Restricted use pesticide' requires a certified applicator or person under direct supervision; general-use pesticides may be applied by the public per label.

Aerial, chemigation, and certain use sites carry specific label prohibitions; always check the use-site and application-method sections before application.

Exposure routes are dermal, inhalation, oral, and ocular; dermal is the most common route for agricultural applicators.

Absorption is fastest on thin, moist, or damaged skin (scalp, neck, groin); wash promptly with soap and water-never use solvents or oil on skin.

PPE selection follows the label: minimum long-sleeve shirt, long pants, shoes plus socks; chemical-resistant gloves, apron, goggles, respirator as specified.

Chemical-resistant glove materials: nitrile and butyl are broadly effective; latex and leather are not chemical-resistant for most pesticides.

Respirator types: particulate filters (N, R, P series) for dusts/mists; chemical cartridges for vapors; fit-test and change cartridges per label and manufacturer guidance.

Heat stress vs. pesticide poisoning: heat illness shows dizziness, sweating, nausea; organophosphate/carbamate poisoning shows pinpoint pupils, salivation, sweating, muscle twitching-treat as emergency.

Spill response: protect people, stop the source if safe, contain with absorbent, dike runoff, and follow label/SDS for cleanup and disposal.

Signs of pesticide poisoning include headache, blurred vision, excessive salivation, sweating, nausea, and muscle twitching; seek medical help and provide the label/SDS to the physician.

FIFRA (Federal Insecticide, Fungicide, and Rodenticide Act) governs registration, labeling, and use of pesticides; EPA administers it, states may enforce stricter rules.

Certified applicator categories: private (applies to own/rented land as a producer) vs. commercial (applies for hire or on others' property); certification requires passing exams and recertification.

Recordkeeping: certified applicators must keep records of restricted-use pesticide applications (product, amount, date, location, applicator) for the period required by federal/state rules.

Worker Protection Standard (WPS) requires notification, REI compliance, decontamination supplies, and training for agricultural workers and handlers.

Endangered Species Act: labels may include county-specific use limitations; check Bulletins Live! Two for geographic restrictions before applying.

Groundwater and surface water protection: avoid application near wells, sinkholes, and waterways; follow setback distances and buffer strips on the label.

Disposal: triple-rinse empty containers (fill 1/4, rinse, drain into spray tank, repeat), puncture, and dispose per state rules; never burn or reuse pesticide containers.

Pesticide storage: keep in original labeled containers, locked, ventilated, away from food/feed, and protected from freezing and flooding.