MT Pesticide Applicator key terms

A decision-making approach that combines biological, cultural, mechanical, and chemical tactics to keep pest populations below damaging levels, using pesticides only when monitoring shows they are needed.

The pest population level at which the cost of control equals the value of crop loss prevented; treatment is justified only when the population is expected to exceed this level.

Systematic inspection of crops, sites, or structures to detect pests, measure their numbers, and track crop or site conditions so control decisions rest on current information rather than habit.

The inherited ability of a pest population to survive a pesticide dose that would normally kill it, developed through repeated selection and managed by rotating modes of action and using nonchemical tactics.

The specific biochemical or physiological process through which a pesticide kills or inhibits a pest; grouping products by mode of action guides rotation and resistance management.

The minimum number of days that must pass between the last pesticide application and harvest of the crop, as stated on the label, so residues stay within legal limits.

A pest that lives on the outside of an animal's body, such as lice, ticks, mites, or flies, and is controlled with sprays, pour-ons, dusts, or feed additives.

The minimum time between treating a food-producing animal and slaughter or milk collection, set so that drug or pesticide residues fall below legal tolerances.

An insecticide added to livestock feed or mineral that passes through the animal's digestive tract and kills fly larvae developing in manure.

Application of an oil-based herbicide to the lower trunk bark of a woody plant to kill it, useful where cut-stump or foliar methods are impractical.

Applying herbicide to the freshly cut surface of a stump to prevent resprouting, commonly used in forest and right-of-way brush control.

Applying pesticides from aircraft, useful for large or inaccessible areas but requiring careful drift management, weather monitoring, and buffer compliance.

Using natural enemies such as predators, parasites, or pathogens to reduce pest populations, often as part of an integrated pest management program.

Injury to plants caused by a pesticide or other chemical, appearing as leaf burn, curling, stunting, discoloration, or death; it can result from overdose, wrong product, or drift.

The process of measuring and adjusting application equipment so it delivers the intended amount of pesticide uniformly over a known area, protecting efficacy and preventing overapplication.

The component of spray equipment that breaks liquid into droplets and shapes the spray pattern; its size, type, and wear strongly affect coverage and drift.

A herbicide that injures target weeds while leaving a desired crop or turfgrass relatively unharmed when applied at labeled rates and timing.

Application of a pesticide, usually a fungicide or insecticide, to seeds before planting to protect germinating seeds and seedlings from soilborne pests and diseases.

Applying pesticide dust or slurry to seed in the planter box during planting, a simple method that requires careful calibration to avoid overdose or skips.

A herbicide registered for use in water to control nuisance algae or aquatic plants; products must be chosen for the water use and may carry irrigation or drinking-water restrictions.

A pesticide used to kill or suppress algae in ponds, lakes, or irrigation systems; treatment often needs to be split into smaller doses to prevent oxygen depletion.

Land such as roadsides, railroads, utility corridors, or pipelines where vegetation management keeps sight lines, access, and equipment clear; treatments often use non-selective or selective herbicides.

The movement of pesticide droplets, particles, or vapor away from the target area by wind or air currents, which can injure sensitive plants, animals, or people.

A weather condition in which a layer of warm air traps cooler air near the ground, reducing vertical mixing and allowing pesticide droplets or vapor to travel long distances off target.

An untreated area between the application site and a sensitive area such as water, a house, or a school, required by some labels to reduce the risk of drift and contamination.

A herbicide that injures or kills most plants it contacts, used for bare-ground, right-of-way, or spot treatments where no desirable vegetation should remain.

A pesticide that forms a gas or vapor and moves through soil, stored products, or a sealed structure to kill pests; it requires special equipment, sealing, and strict safety precautions.

A pesticide mixed with a food or attractant that pests consume, allowing control with small amounts of active ingredient and reducing exposure to nontarget organisms.

A pesticide that disrupts insect development, such as molting or metamorphosis, rather than acting as a direct nerve poison, and is often effective against immature stages.

A pesticide that remains active on a treated surface for a period after application, continuing to control pests that contact it later.

Placing small amounts of pesticide into narrow openings where pests hide, reducing exposure to people and pets while targeting harborage areas.

An organism, often an insect or tick, that transmits a disease-causing pathogen from one host to another; vector control targets these pests to protect public health.

Removing food, water, and shelter that pests need, through cleaning, trash handling, and exclusion, so populations cannot become established.

A legal restriction on the movement of plants, animals, or products to prevent the spread of a pest or disease into areas where it is not established.

The maximum legal residue level of a pesticide allowed in or on food or feed, established by EPA; exceeding it makes the food adulterated.

A pesticide that may be applied only by or under the direct supervision of a certified applicator because it poses special risks to people or the environment.

A word such as DANGER, WARNING, or CAUTION printed on a pesticide label to indicate the relative acute toxicity and hazard of the product.

A state registration that allows a pesticide to be used for a specific local pest problem not covered by the federal label, with state-approved directions.

A chemical released by an insect to influence the behavior of others of its species, used in traps for monitoring or in mating disruption for control.

A permit issued by EPA allowing limited testing of an unregistered pesticide or a new use to gather data needed for registration.