NE Pesticide Applicator cheat sheet

FIFRA makes the label the law: any use inconsistent with the label is a federal violation, and the label is the primary source of legal use directions, rates, and restrictions.

Registration types: Section 3 is the federal registration; Section 24(c) permits a state special local need use; Section 18 is a time-limited emergency exemption.

Restricted-use pesticides may be applied only by a certified applicator, or by a noncertified person acting under the certified applicator's instruction and control (direct supervision).

Federal restricted-use pesticide application records must be retained 2 years and include product name, EPA registration number, amount, date, location, and applicator.

In Nebraska, the Department of Agriculture is the lead pesticide enforcement agency, and applicator certification remains valid for 3 years.

Signal words by toxicity category: DANGER, with POISON and skull-and-crossbones added for the most toxic Category I products; WARNING for Category II; CAUTION for Category III; Category IV requires no signal word.

Every label carries the child hazard warning "Keep out of reach of children" in addition to the signal word and precautionary statements.

The REI is the minimum interval after application before workers may enter without PPE; the PHI is the minimum number of days between the last application and harvest.

Storage, disposal, and container directions are enforceable label requirements, and a pesticide container must never be reused for food, feed, or water.

IPM combines prevention, monitoring, action thresholds, and selection of the least-risk effective control; pesticides are one tool, not the default.

The action (economic) threshold is the pest density at which the value of expected loss equals the cost of control; it is set at or below the economic injury level.

Insects have three body regions, six legs, and two antennae; mites and ticks have eight legs as adults and are not insects.

Grass weeds (monocots) show one cotyledon and parallel leaf veins; broadleaf weeds (dicots) show two cotyledons and netlike veins.

Resistance management means rotating and combining effective herbicide group numbers (sites of action) plus nonchemical tactics; Nebraska waterhemp and Palmer amaranth populations carry resistance to multiple groups.

Degree days = [(daily maximum + daily minimum) / 2] minus the lower development threshold, summed daily; used to predict insect stages and time scouting.

Scouting tools include sweep nets, beat cloths, pheromone and sticky traps, and percent-defoliation ratings; sample enough random locations to represent the field.

Separate biotic from abiotic problems: pathogens and insects show signs and spreading patterns, while nutrient, weather, and herbicide injury often follow soil patterns or sprayer passes; Koch's postulates confirm a pathogen.

Label PPE is a legal minimum; baseline attire is long pants, long-sleeved shirt, shoes, and socks, with gloves, coveralls, and eyewear added as the label specifies.

Chemical-resistant glove materials include butyl, nitrile, neoprene, and barrier laminate; leather and cloth absorb pesticides and must not be used for handling.

A lower LD50 means higher toxicity; comparisons are valid only within the same exposure route (oral, dermal, inhalation) and test species.

Respirator use requires a medical evaluation, fit testing, and a cartridge change schedule; a particulate filter does not protect against vapors.

Organophosphate and carbamate poisoning produces SLUDGE signs (salivation, lacrimation, urination, diarrhea, GI cramps, emesis) and is a medical emergency.

Dermal exposure: remove contaminated clothing and wash with soap and water for 15 minutes; eye exposure: flush with clean water for 15 minutes.

The national Poison Help line is 1-800-222-1222; do not induce vomiting unless the label directs it, and bring the label to medical personnel.

Heat illness and pesticide poisoning overlap in headache, dizziness, nausea, and weakness; stop work, cool the person, and obtain medical evaluation.

Work clothing contaminated with concentrate is laundered separately from family laundry; heavily contaminated leather items such as boots and gloves are discarded.

Broadcast boom formula: GPA = (GPM x 594) / (MPH x nozzle spacing in inches).

1/128 acre method: catch one nozzle's output in ounces over a measured distance and the ounces equal GPA; distances are 340 ft for 20-inch spacing, 204 ft for 30-inch, and 136 ft for 40-inch.

Nozzle flow varies as the square root of pressure: quadrupling pressure doubles flow, and doubling pressure raises flow about 41 percent.

Product per tank = (label rate per acre) x (tank capacity / GPA); acres per tank = tank gallons / GPA.

Replace nozzles when flow exceeds the new-nozzle rate by 10 percent or the pattern is distorted; check each nozzle, not only the average.

Tank mix order: water first, then dry formulations (WP/WDG), then liquid flowables, then emulsifiable concentrates, with surfactants and oils last and agitation maintained throughout.

A jar test using the actual carrier water and intended mixing order detects incompatibility (clumping, separation, heat) before a full tank is committed.

Triple rinsing: drain the container, add about one-quarter volume of water, shake, pour the rinse water into the tank, repeat twice, then puncture or recycle.

Conversions for small-plot calibration: 1 acre = 43,560 square feet and 1 gallon = 128 fluid ounces.

Particle drift is off-target droplet movement during application; vapor drift is volatilization of pesticide after deposition; the two are controlled differently.

Do not spray during a temperature inversion, indicated by calm air, dew or fog, clear skies, and smoke that hangs and drifts; fine droplets can then move long distances.

Drift reduction: larger droplets from low-drift or air-induction nozzles, lower boom height, lower pressure, higher carrier volume, and drift retardants; always check wind speed and direction.

Label buffer zones and setbacks protect water bodies, sensitive sites, and endangered species; check EPA's Bulletins Live! Two for the specific site and month before applying.

Pollinator protection: do not apply to blooming crops or weeds while bees are foraging; apply in late evening or at night whenever possible.

Runoff control: incorporate or band applications, avoid spraying before heavy rain, and use filter strips, grassed waterways, and terraces.

Leaching risk rises with high water solubility, low soil adsorption (low Koc), long persistence, sandy low-organic-matter soils, and shallow groundwater, conditions present on parts of Nebraska's sandy soils.

Spill response: stop the source, contain with absorbent or soil, protect drains, wells, and surface water, then report as required to the Nebraska Department of Agriculture and emergency services.

Half-life indicates persistence in soil or water, and bioaccumulation plus biomagnification can raise residue levels in organisms higher in the food chain.