NYS PCO/PCT key terms

A credential issued by the NYS Department of Environmental Conservation that authorizes a person to buy, use, or supervise the use of restricted-use pesticides in New York, after passing required exams and paying fees.

An individual who holds a current NYSDEC certification in one or more pesticide categories and is legally responsible for applications made under that certification, including those made by noncertified technicians they supervise.

A certified applicator who applies pesticides for hire on property they do not own or rent, such as a lawn care or pest control operator serving customers for a fee.

A certified applicator who uses or supervises the use of restricted-use pesticides on land they own or rent, typically for agricultural production, and who does not apply for hire.

A noncertified employee of a registered pesticide business who may apply general-use pesticides and certain restricted-use pesticides only while working under the direct supervision of a certified applicator.

A supervisory standard in which the certified applicator is physically present at the application site, has direct voice contact with the technician, and can immediately assist or take over the work if needed.

An annual NYSDEC registration required for any business that sells, offers, or performs pesticide applications in New York, listing the business location and the certified applicators responsible for its work.

A pesticide that, because of its toxicity or environmental hazard, may be sold and used only by or under the direct supervision of a certified applicator, as designated by federal or New York State regulation.

A pesticide that can be purchased and used by the general public without certification, though all label directions, safety precautions, and state restrictions still legally apply to its use.

The written, printed, or graphic material attached to or included with a pesticide container that states ingredients, directions for use, precautions, and restrictions, and which is legally binding on the user.

All written material that accompanies a pesticide or is referenced on its label, including the label itself, supplemental leaflets, brochures, and worker protection information supplied with the product.

The instructions on a pesticide label describing approved sites, target pests, application rates, timing, equipment, and precautions; using a product in a manner inconsistent with them violates federal and state law.

Applying a pesticide in a way that differs from its label directions, such as using a higher rate, treating an unlisted site, or ignoring required protective equipment; this is a violation of federal and New York law.

The amount of product the label specifies per unit area, volume, or other measure; applying more than the labeled rate is illegal and increases pest resistance, injury, and environmental contamination risks.

A special local-need registration that allows a state to permit additional uses of a federally registered pesticide within its borders, issued in New York by NYSDEC with a state-specific label.

A temporary authorization, often called a Section 18 exemption, allowing limited use of an unregistered pesticide or an unregistered use during a declared pest emergency, subject to strict conditions and reporting.

The federal Federal Insecticide, Fungicide, and Rodenticide Act, which governs pesticide registration, labeling, distribution, and use nationwide; New York enforces it through its own environmental conservation law and regulations.

The maximum legally permitted pesticide residue on or in a food or feed commodity, set by the U.S. EPA; food with residues above the tolerance may not be sold.

The minimum number of days the label requires between the last pesticide application and harvest of the treated crop, protecting consumers by keeping residues within established tolerances.

The period after a pesticide application during which entry into a treated area is restricted to protect workers from exposure, as stated on the label and enforced under worker protection rules.

Clothing and gear such as gloves, coveralls, respirators, boots, and eye protection that the label requires or recommends to reduce applicator exposure during mixing, loading, application, and cleanup.

A check confirming that a respirator seals properly against the wearer's face; required before use, along with medical evaluation and training, when the label requires respiratory protection.

A word on the pesticide label, such as DANGER, WARNING, or CAUTION, that indicates the relative acute toxicity of the product and the level of precaution the user must take.

Illness or injury caused by exposure to a pesticide, ranging from mild symptoms such as headache and nausea to severe effects like seizures or respiratory failure, requiring prompt medical attention.

A class of insecticides, including organophosphates and carbamates, that disrupt nerve signaling by blocking the enzyme cholinesterase; exposure can cause serious poisoning and may require baseline blood testing.

Contact with a pesticide through the skin, lungs, mouth, or eyes; applicators reduce risk through protective equipment, careful handling, ventilation, and immediate washing after contact.

The procedures for containing, absorbing, and cleaning up a spilled pesticide safely, including protecting people, keeping the material out of drains and waterways, and properly disposing of cleanup materials.

A container-cleaning method in which an emptied pesticide container is filled about one-quarter full, rinsed three times, and each rinse added to the spray tank, making the container safe for disposal.

The required handling of empty pesticide containers, typically by pressure or triple rinsing followed by recycling or approved disposal, never by burning or reusing them for other purposes.

Keeping pesticides in a secure, ventilated, dry area away from food, feed, children, and animals, with containers kept in original labeled form and inventory checked regularly for damage or expiration.

A decision-making approach that combines monitoring, sanitation, biological and cultural controls, and judicious pesticide use to manage pests with the least possible risk to people and the environment.

The pest population level at which control measures should begin to prevent unacceptable damage, helping applicators avoid unnecessary pesticide applications and preserve natural enemies.

Regular inspection and recordkeeping to detect pests and assess their numbers and damage, providing the information needed to choose control tactics and time applications correctly.

Managing pests by using or conserving living organisms such as predators, parasites, and pathogens, which can reduce pest populations while limiting reliance on chemical pesticides.

The inherited ability of a pest population to survive a pesticide dose that would normally kill it, developing through repeated selection; rotating modes of action and integrating other tactics slow its onset.

The specific way a pesticide disrupts a pest's biology, such as by blocking nerve signals or inhibiting an enzyme; grouping products by mode of action helps plan rotations that prevent resistance.

Movement of pesticide across the ground surface into storm drains, streams, and lakes, often after rain or overirrigation; reducing rates, timing applications, and using buffer strips limit it.

Downward movement of pesticide through soil into groundwater, influenced by the product's solubility and persistence, soil texture, and the amount of water moving through the profile.

The presence of pesticide residues in underground water supplies, which is difficult and costly to reverse and is a major concern on Long Island and other sensitive areas of New York.

A vegetated area between a treated site and a water body, well, or sensitive habitat that slows runoff, filters sediment, and reduces the chance of pesticides reaching water resources.

The required documentation of pesticide applications, including product name, EPA registration number, amount used, date, location, and applicator, which New York requires be kept and made available for inspection.

A unit earned by attending approved continuing education courses, used to renew a NYSDEC pesticide certification before it expires; insufficient credits require retaking the certification exam.