IN Pesticide Applicator cheat sheet

FIFRA is the federal statute governing pesticide registration, labeling, and use; EPA administers it and states may obtain primary enforcement authority (FIFRA section 24(c) special local needs registrations).

A pesticide is "misbranded" if its label lacks required information or its labeling is false or misleading; using a pesticide in a manner inconsistent with its labeling is a separate violation under FIFRA.

Certified applicators may use a restricted-use pesticide only for the certified category and site on their credential; applying a restricted-use product without certification or supervision violates the law.

Indiana requires certification for commercial applicators and for private applicators who use restricted-use pesticides on agricultural commodities; categories are assigned by site and pest.

Recordkeeping: certified applicators must retain application records for the period specified by state rule; federal worker protection standard requires records of pesticide applications to be kept for 2 years.

The Worker Protection Standard (40 CFR Part 170) requires pesticide safety training, notification, decontamination supplies, and PPE for agricultural workers and handlers.

Under FIFRA, states may regulate pesticide sale and use but may not permit any use prohibited by federal law; more restrictive state rules are allowed.

EPA registration number format is "EPA Reg. No." followed by company number, product number, and optional distributor number; the number identifies the registered product, not the active ingredient.

Signal words rank toxicity: DANGER (Category I, plus POISON and skull-and-crossbones if oral LD50 very low), WARNING (Category II), CAUTION (Category III/IV).

"Danger" without the word Poison indicates a Category I product whose acute toxicity is driven by dermal or inhalation or eye/skin irritation rather than oral lethality.

The label's "Directions for Use" is enforceable law; the label is the primary source for rates, sites, PPE, reentry intervals, and restrictions.

Precautionary statements specify required PPE; if the label requires chemical-resistant gloves, they must be worn for mixing, loading, application, and cleanup unless an exception is stated.

Restricted-entry interval (REI) is the minimum time after application before workers may enter a treated area without PPE; it appears on the label and must be communicated to workers.

First aid: for dermal exposure remove contaminated clothing and wash with soap and water; for eye exposure flush with water for at least 15 minutes; always follow the label's specific first-aid statement.

Never induce vomiting unless directed by the label or a physician; some formulations (e.g., petroleum distillates, corrosives) cause additional injury if vomited.

Storage: keep pesticides in original labeled containers, out of reach of children and animals, away from food and feed, and never store in food or beverage containers.

Integrated Pest Management (IPM) sequence: identify pest, monitor/assess, set action threshold, choose control tactics (cultural, biological, chemical), evaluate results.

Economic threshold is the pest density at which control action is justified to prevent economic loss; economic injury level is the density that causes loss equal to control cost.

Pesticide resistance management relies on rotating mode-of-action groups (IRAC/HRAC/WSSA classifications), using labeled rates, and avoiding repeated use of one chemistry.

Pests include insects, weeds, plant pathogens (fungi, bacteria, viruses), nematodes, mollusks, and vertebrates; correct identification determines whether a pesticide is even appropriate.

Mode of action differs from site of action; knowing the IRAC group helps rotate chemistries and slow resistance development.

Weed control timing: preemergence herbicides act on germinating seeds, postemergence herbicides act on emerged weeds; crop and weed growth stage affects selectivity and efficacy.

Biological control uses natural enemies (predators, parasitoids, pathogens); conserve them by minimizing broad-spectrum insecticide use and timing applications to reduce harm.

Sanitation and exclusion (removing crop residue, cleaning equipment, using screens) reduce pest introduction and are foundational cultural controls.

Calibration formula for broadcast sprayers: GPA = (GPM per nozzle × 5940) / (MPH × nozzle spacing in inches).

Flow rate relationship: GPM per nozzle = (GPA × MPH × nozzle spacing in inches) / 5940.

To change output, adjust nozzle size, pressure, or speed; pressure changes flow approximately with the square root of pressure ratio (doubling pressure raises flow about 1.41×).

Calibration steps: check nozzle output uniformity, measure travel speed, measure effective swath width, then compute GPA; recalibrate when changing nozzles, speed, or formulation.

Nozzle wear increases flow; replace nozzles when output varies more than about 10% from the new-nozzle rate or from other nozzles on the boom.

Spray drift is reduced by larger droplets (higher pressure increases drift; lower pressure and larger nozzles reduce it), drift-reducing nozzles, lower boom height, and applying when wind is within label limits.

Tank mix calculation: amount of product = (desired rate per acre × acres to treat) / concentration factor; always verify units (per acre vs per 1000 sq ft).

Granular applicators are calibrated by measuring output over a known distance and speed, then converting to pounds per acre using swath width.