AZ Pesticide Applicator cheat sheet

Signal words rank acute toxicity: DANGER-POISON (oral LD50 ≤50 mg/kg), DANGER (≤50 oral, ≤200 dermal, or corrosive), WARNING (50-500 oral, 200-2000 dermal), CAUTION (>500 oral, >2000 dermal).

The label's first-aid statement is the only approved treatment guidance; keep the label available when calling a poison control center or physician.

PPE categories on labels are stated as chemical-resistant gloves, footwear, protective eyewear, coveralls, and respirator type; all listed items are required simultaneously.

Mix and load in a well-ventilated area; never eat, drink, or smoke while handling, and wash hands before breaks and after handling.

Triple-rinse or pressure-rinse empty containers: fill 1/4 with water, rinse 30 seconds, drain into spray tank; repeat three times, then puncture or crush and dispose per label.

Absorption rate of pesticide through skin is highest on the scrotum, head, and neck; hands are a common exposure route, so gloves are critical.

Cholinesterase-inhibiting insecticides (organophosphates and carbamates) cause SLUDGE symptoms: salivation, lacrimation, urination, diarrhea, GI upset, emesis.

Store pesticides in original labeled containers, locked, away from food and feed; never transfer to beverage bottles or unlabeled containers.

Economic threshold (action threshold) is the pest density at which control measures are justified to prevent economic loss; economic injury level is the density where loss equals control cost.

Integrated Pest Management sequence: prevention, monitoring and identification, threshold decision, then biological, cultural, mechanical, and chemical tactics in that order of preference.

Correct identification determines the control: herbicides act on plants, insecticides on insects, fungicides on fungi; misidentification wastes product and can injure the crop.

Resistance management: rotate among IRAC or FRAC mode-of-action groups and avoid repeated use of a single group within a season or across seasons.

Weed classification by life cycle: annuals complete life cycle in one year, biennials in two, perennials live more than two years and often regrow from roots or rhizomes.

Insect metamorphosis: complete (egg, larva, pupa, adult) means larvae are the damaging stage; incomplete (egg, nymph, adult) means nymphs and adults both feed.

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

Beneficial insects and pollinators are harmed by broad-spectrum products applied during bloom; apply when pollinators are not foraging.

Label sections include: brand name, ingredient statement, net contents, EPA registration number, signal word, precautionary statements, directions for use, and storage/disposal.

The label is the law: use inconsistent with the label is a violation of FIFRA; the label and its supplemental labeling govern legal use.

Restricted-use pesticides may be applied only by or under the direct supervision of a certified applicator, per the label.

Preharvest interval (PHI) is the minimum days between last application and harvest; reentry interval (REI) is the minimum time workers may not enter treated areas without PPE.

Worker protection standard requires notification of treated areas, decontamination supplies, and a pesticide safety training for agricultural workers.

Section 24(c) allows a state to register a special local need use; Section 18 permits emergency exemptions from registration.

The label's environmental hazard statement names groundwater, surface water, and endangered species restrictions; the endangered species protection bulletin may further limit use.

Recordkeeping: certified applicators must keep records of restricted-use pesticide applications for at least two years; the label may require more.

GPA = (GPM × 5940) / (MPH × W), where GPM is nozzle output per nozzle, MPH is speed, and W is nozzle spacing in inches.

To calibrate a boom sprayer by the 1/128-acre method: measure 1/128 acre (340 ft²) of course, collect nozzle output over that distance, and ounces collected equal gallons per acre.

Flow rate through a nozzle varies with the square root of pressure: doubling pressure increases flow about 1.41 times, not twice.

Nozzle output is proportional to orifice size; replace worn nozzles when output exceeds 10 percent of the new nozzle rate.

Sprayer speed and pressure are the primary calibration variables; changing one requires recalculation to maintain the labeled rate.

Check pattern uniformity with a spray pattern table or by comparing nozzle outputs; replace nozzles with 10 percent variation between tips.

Granular applicators are calibrated by catching material over a measured distance and comparing to the label rate per acre.

Clean and rinse equipment after each use and before switching products to prevent cross-contamination and crop injury.

Drift is affected by droplet size, wind speed, boom height, and temperature; use coarse droplets, lower boom, and larger nozzles to reduce off-target movement.

Apply when wind is 2-10 mph; avoid applications during temperature inversions, which suspend fine droplets and move them long distances.

Do not apply when rain is forecast within the label interval; runoff and leaching can contaminate groundwater and surface water.

Buffer zones and setbacks protect surface water, wells, and sensitive areas; follow label distances and any state-specific setbacks.

The reentry interval protects workers; post treated areas and provide decontamination supplies at the worksite.

Protect pollinators by avoiding applications during bloom and by following label pollinator protection statements.

Dispose of rinse water and containers according to label and state rules; never dump into drains, ditches, or surface water.

Report pesticide spills and incidents to the state lead agency; contain spills with absorbent material and prevent runoff.