OK Pesticide Applicator cheat sheet

FIFRA gives EPA authority to register pesticides; applying a product in a manner inconsistent with its label is a violation of federal law.

Restricted-use pesticides may be applied only by certified applicators or by persons working under a certified applicator's direct supervision.

Signal words rank acute toxicity: DANGER (with POISON and skull-and-crossbones) is Category I, WARNING is Category II, CAUTION is Categories III–IV; LD50 and LC50 values are inversely related to toxicity.

The Worker Protection Standard requires handler training every 12 months, a 4-hour minimum restricted-entry interval for most agricultural uses unless the label is longer, and central posting of application information.

Respirators require an annual fit test, a medical evaluation before use, and a cartridge change schedule based on label directions or objective data.

Certified applicators must keep records of restricted-use pesticide applications for 2 years, including product, rate, date, location, and crop or site.

The six basic acute studies behind precautionary statements are oral, dermal, and inhalation toxicity, plus eye irritation, skin irritation, and skin sensitization.

Drift is governed by droplet size, boom height, pressure, and wind speed and direction; volatile ester formulations such as 2,4-D ester can move off-site as vapor after deposition.

The state lead agency for pesticide registration, licensing, and enforcement in Oklahoma is the Oklahoma Department of Agriculture, Food and Forestry.

Calibrate sprayers at the start of the season and again whenever nozzles, pressure, or travel speed change.

Broadcast boom formula: gallons per acre = (GPM per nozzle × 5940) ÷ (MPH × nozzle spacing in inches).

Replace nozzles when measured output deviates more than about 10% from the rated flow; worn tips distort pattern and increase rate.

Spray water above pH 7 degrades some products such as organophosphates and glyphosate; a jar test reveals incompatibility before tank mixing.

Rotate herbicide mode-of-action groups (WSSA numbers) and insecticide IRAC groups to delay resistance.

Plant-back intervals on soil-residual herbicide labels define how soon a rotational crop may follow, based on soil persistence and crop sensitivity.

Preharvest interval (time before harvest) is a separate restriction from re-entry interval (time before worker entry without PPE).

Area-wide programs such as boll weevil eradication and grasshopper suppression operate under state and federal coordination in addition to the product label.

Livestock ectoparasites include horn flies, stable flies, lice, and ticks; controls are ear tags, pour-ons, dust bags, and back rubbers.

Horn flies develop insecticide resistance quickly, so rotate chemical classes and use nonchemical tactics such as manure management and fly predators.

Observe label meat and milk withdrawal times; extra-label use in food animals requires veterinary direction and a valid veterinarian-client-patient relationship.

Feed-through insect growth regulators pass into manure and suppress fly larvae; use only at labeled rates for the labeled species.

Rodent and bird control in barns relies on feed storage, sanitation, exclusion, and secured labeled bait stations.

Milk rooms and feed-handling areas restrict most applications; many dusts and sprays are prohibited in milk houses because of residue risk.

Record animal treatments by group, product, and date so withdrawal compliance can be verified at slaughter or milk pickup.

Forest herbicide uses fall into site preparation, release, and timber stand improvement; conifer tolerance differs by species, size, and season.

Basal bark treatment applies an oil-carrier mix to the lower 12–15 inches of thin-barked stems; hack-and-squirt injects herbicide into cuts around the trunk.

Cut-stump treatments prevent resprouting and must be applied to the cambium ring immediately after cutting.

Streamside management zones and untreated buffers limit drift and runoff into water bodies and protect aquatic habitat.

Southern pine beetle and pine engraver control depends on locating and removing infested trees before brood emergence.

Aerial forest applications require accurate swath control, flagging, and maps of sensitive adjacent sites.

Remote operations require a written communication plan, evacuation route, and a spill kit carried on site.

Turf sprayers are calibrated on a 1,000-square-foot basis; 1/128 acre equals 340 square feet, and ounces caught per 340 square feet equals gallons per acre.

Granular calibration: pounds per 1,000 square feet = (pounds collected ÷ area covered in square feet) × 1000.

Preemergent crabgrass herbicides must be applied before soil temperature at 2 inches reaches about 55°F.

Fungicides perform best preventively; rotate FRAC groups because turf pathogens quickly develop resistance.

2,4-D and dicamba can volatilize and drift, injuring ornamentals, grapes, and tomatoes; avoid application near sensitive plants in hot weather.

Irrigate granular products as the label directs, and avoid mowing immediately before or after certain treatments.

Tree and shrub options include soil drench, trunk injection, and bark spray; each has distinct timing and uptake characteristics.

Maintain buffers around surface water, and avoid applying turf products to saturated soils or before predicted heavy rain.

Interiorscape work uses spot, crack-and-crevice, and individual-plant treatments rather than broadcast sprays.

Low-odor, low-residue formulations and baits are preferred; aerosols and dusts require occupant protection and adequate ventilation.

Common pests are fungus gnats, mealybugs, scales, spider mites, and thrips; systemic granules are taken up through the roots.

Sanitation such as removing heavily infested plants and cleaning debris reduces reliance on pesticide applications.

Do not treat food-contact surfaces or areas where children play; keep applications off desks, break areas, and food storage.

Flammable aerosols and foggers require removal or shutdown of ignition sources and exclusion of occupants.

Keep a record for every site visit showing product, rate, area treated, and applicator.

Nursery and greenhouse pesticide uses include soil or media fumigation, drenches, chemigation, and incorporated granules.

Methyl bromide alternatives include chloropicrin, metam sodium, and steam; each carries its own buffer, PPE, and reentry requirements.

Recirculating irrigation spreads pathogens and pesticide residues; monitor and treat recycled water before reuse.

Whiteflies, thrips, and spider mites develop resistance rapidly in greenhouses, so rotate IRAC groups and use biological controls.

Protect bumblebees and other managed pollinators: remove hives or select bee-safe products before flowering treatments.

Phytotoxicity varies with cultivar, temperature, and light; test a small group before treating an entire crop.

Capture runoff and follow label and permit limits before any discharge.

Treated seed is a pesticide; the seed treatment label and treated-seed labeling requirements both apply.

Treated seed must be dyed to prevent use as food, feed, or oil, and empty seed bags are handled as pesticide containers.

Calibrate seed treaters in fluid ounces of product per hundredweight of seed, and check coverage with a dye test.

Neonicotinoid seed treatments raise pollinator concerns; use fluency agents and planter deflectors to reduce abrasive dust.

Do not plant treated seed near blooming crops or during high wind when the label restricts it.

Store treated seed in labeled containers away from feed and at conditions that preserve germination.

Keep records by seed lot showing product, rate, date, and treater.

Only aquatic-registered products and aquatic-labeled adjuvants may be applied to water.

Aquatic applications may require a state permit or NPDES coverage in addition to compliance with the label.

Killing too much vegetation at once can cause a dissolved-oxygen crash and fish kill; treat one-third or less of the water body per operation.

Water-use restrictions after treatment (drinking, irrigation, swimming, fishing) vary by product and must be followed exactly.

Correctly identify the target - algae, floating, submersed, or emergent plants - because product spectrum and application method differ.

Endothall, fluridone, 2,4-D, diquat, glyphosate, and copper compounds have distinct spectrums; the amine form of 2,4-D is used in water.

Grass carp are a biological control that requires state authorization in Oklahoma.

Submersed treatments use weighted hoses or injected pellets; surface treatments require even coverage of the target area.

Right-of-way programs combine residual bare-ground products, foliar contact products, and cut-stump treatments.

Bare-ground strips are usually banded along pavement edges and around appurtenances rather than broadcast over the full width.

Adjacent sensitive crops, vineyards, and residences dictate buffer distances, droplet size, and application timing.

Dormant-season and late-fall applications reduce injury to desirable grasses and take advantage of downward translocation.

Low-volume, high-concentration sprays reduce water hauling but require recalibration for the specific equipment used.

Use approved colorants to mark treated areas and verify coverage.

Traffic control, high-visibility clothing, and proper equipment signage are part of roadside safety.

IPM sequence: inspection, pest identification, sanitation and exclusion, then targeted pesticide use.

Cockroach control commonly combines gel baits placed in cracks and crevices with insect growth regulators.

Ant control requires locating trails and colonies; perimeter sprays alone often disrupt and worsen baiting programs.

Rodent work starts with snap traps and glue boards; rodenticides require secured, labeled, tamper-resistant bait stations.

Label terms such as crack-and-crevice, spot, and broadcast define exactly where a product may legally be placed.

Rotate active ingredients to counter resistance in bed bugs, cockroaches, and house flies.

Never apply pesticides to food-contact surfaces or where they could contaminate food, utensils, or packaging.

Termiticide soil treatments must form a continuous barrier along foundation walls, piers, and utility penetrations.

A common label rate is 4 gallons of finished dilution per 10 linear feet of trench per foot of depth.

Preconstruction treatment covers slab, block fill, and voids before the concrete is poured.

Termite baits use cellulose matrices with slow-acting active ingredients and require monitoring plus colony elimination.

Post-treatment diagrams and records show treated zones, rates, and materials and may be required for disclosure or lending.

Other wood destroyers include carpenter ants, powderpost beetles, and decay fungi; some require moisture correction rather than pesticide.

Borate treatments protect unfinished wood from termites and decay fungi but do not penetrate painted or sealed surfaces.

Structural fumigants include sulfuryl fluoride, methyl bromide, phosphine, and chloropicrin; metam sodium is a soil fumigant.

Every structural fumigation requires a Fumigation Management Plan, sealing, buffer-zone calculation, and required notification of neighbors and authorities.

Fumigant concentration is monitored with detection equipment throughout the exposure period.

Clearance testing must show concentrations below the label reentry level before occupants may return.

Phosphine reacts with moisture to produce a corrosive, flammable gas and can damage metals and electronics.

Fumigation PPE often requires supplied-air or SCBA rather than air-purifying respirators.

Fumigators must hold the appropriate Oklahoma certification and notify fire and police officials as the label requires.

Never enter a fumigated space alone; use a buddy system and a calibrated gas monitor.

Mosquito control integrates source reduction, larvicides such as Bti, methoprene, and oils, and adulticides.

ULV adulticides produce droplets roughly 10–30 microns, small enough to stay airborne and contact flying mosquitoes.

Rotate adulticide classes to prevent resistance and monitor effectiveness with caged sentinel mosquitoes.

Apply at dusk or dawn when pollinators are less active, and notify nearby beekeepers when required.

Surveillance for West Nile virus and eastern equine encephalitis drives the decision to treat.

Rodent control in public health includes bait stations, trapping, and flea control, since fleas transmit plague.

Rodenticides placed in public areas require tamper-resistant, labeled stations.

Regulatory programs use detection surveys, delimiting surveys, quarantine, and eradication treatments.

Quarantine and hold orders restrict movement of infested plants, produce, soil, and equipment.

Imported fire ant programs combine broadcast bait applications with individual mound treatments.

Grasshopper and Mormon cricket suppression programs are organized jointly by state and federal agencies.

A FIFRA Section 18 emergency exemption allows limited use of an unregistered pesticide or a new use for a defined period.

Notification and recordkeeping requirements are stricter for regulatory applications near populated areas.

Invasive species programs such as gypsy moth rely on traps plus treatments under federal direction.

Applicators must follow the state regulatory treatment plan in addition to the product label.

An Experimental Use Permit authorizes small-scale field testing of an unregistered pesticide or an unregistered use.

Valid trials require replication, randomization, and an untreated check for comparison.

Plot layout must prevent cross-contamination through buffers and either dedicated sprayers or thorough cleanout.

Records include plot maps, treatments, rates, timing, and results.

Treated research crops may not enter the food supply unless a tolerance or tolerance exemption exists.

Adverse or unexpected effects must be reported to the registrant and EPA as required.

Calibrate and verify application rate before each trial; misapplication invalidates the data.

Migratory birds are protected by the Migratory Bird Treaty Act; taking them requires federal permits.

Bird control uses exclusion such as netting and spikes, habitat modification, frightening devices, and registered avicides.

Rodenticides include first- and second-generation anticoagulants, bromethalin, cholecalciferol, and zinc phosphide.

Second-generation anticoagulants carry secondary-poisoning risk; use tamper-resistant stations and search for and remove carcasses.

Bats are managed by exclusion rather than pesticides, and work should avoid the maternity season.

Feral hogs and other vertebrates are controlled with traps, snares, and shooting under state regulations.

DRC-1339 is a restricted avicide registered for specific bird species under strict label limitations.

Predator control tools include traps, snares, calling and shooting, guard animals, and livestock protection collars.

M-44 devices are spring-loaded cyanide ejectors requiring certification, warning signs, and specific setback distances.

Livestock protection collars containing compound 1080 are restricted to specified states and require carcass recovery.

Identify the target species and assess nontarget risk before placing any predator control device.

Recordkeeping covers device locations, set dates, and any animals taken.

Landowner notification and posting requirements apply to hazardous devices on public and private land.

USDA Wildlife Services and state wildlife agencies regulate many predator control activities.

Wood preservatives include creosote, pentachlorophenol, CCA, ACQ, and borates, each with different uses and hazards.

Pressure schedules vary: full-cell (Bethell) and empty-cell (Rueping, Lowry) processes control retention and penetration.

Retention is expressed in pounds per cubic foot and compared with AWPA use-category standards.

Penetration is verified by borings or cross sections; inadequate penetration means the charge fails specification.

Treating plants handle concentrated preservatives and require chemical-resistant clothing plus respiratory protection.

Dispose of treated wood under state and federal rules; never burn CCA-treated wood.

Remedial treatments such as borate rods and field-cut preservatives extend service life.

Antimicrobial products include disinfectants, sanitizers, sterilants, and preservatives, each with a distinct label claim.

Efficacy is established by AOAC or equivalent methods; the label lists target organisms and required contact time.

Contact time must be observed, and surfaces must be cleaned of organic matter first because soil reduces kill.

Hard water and incorrect dilution reduce effectiveness; mix at the label dilution rate.

Hospital, institutional, and food-contact claims differ; use a product only on its labeled site.

Never mix bleach with ammonia or acids, which release toxic gases.

Rotate disinfectant active ingredients to limit resistance and biofilm formation.

Sewer root control products include metam sodium, dichlobenil, and copper sulfate.

Foam applications are measured in gallons per foot of pipe, and label rates depend on pipe diameter.

Applications are made through cleanouts and must not contaminate drinking water supplies.

Notify the wastewater treatment plant and follow local pretreatment requirements before discharge.

Do not treat blocked lines or where backup into buildings is possible.

Records document address, footage treated, product, dilution, and total volume used.

Cooling tower biocides control Legionella, algae, and biofilm; only EPA-registered antimicrobials may be used.

Oxidizing biocides such as chlorine, bromine, and chlorine dioxide are alternated with non-oxidizing products to limit resistance.

Biofilm protects bacteria, so dispersants and periodic physical cleaning improve biocide performance.

pH, temperature, and organic load change biocide activity and required dosage.

Drift eliminators reduce aerosol release, and aerosol inhalation is the primary exposure risk.

Monitor control with dip slides, ATP testing, or culture methods.

The specialty category covers uses not addressed by other categories, such as certain industrial and unique-site applications.

The label, not the category, defines the legal site and rate; confirm the site appears on the label.

Additional certifications, permits, or site-specific approvals may be required.

Record product, rate, date, location, and applicator for every specialty application.

PPE and reentry requirements follow the label plus any site-specific rules.

Contact the state lead agency when a proposed use is not clearly covered by the label.

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