WASHINGTON PESTICIDE LAWS AND SAFETY
EVALUATION EXAM 2025/2026 QUESTIONS AND
ANSWERS GRADED A+
✔✔Calibrate, Calibration - ✔✔To adjust equipment according tho the amount of material
applied to a target area.
✔✔Carbamates - ✔✔A group of pesticides containing nitrogen, formulated as
insecticides (Sevin, Furadan, Lannates), fungicides (Mancozeb, Maneb), and herbicides
(IPC, CIPC).
✔✔Carcinogenic - ✔✔The ability of a substance or agent to induce malignant tumors
(cancer).
✔✔Carrier - ✔✔1) an inert liquid, solid, or gas added to an active ingredient to make a
pesticide formulation.
2) the material, usually water or oil, used to dilute the formulated product or application.
✔✔Casual Organisms - ✔✔The organism (pathogen) that produce a given disease.
✔✔Chemical Control - ✔✔A pest management strategy that involves the use of
naturally derived or synthetic chemicals that kill, attract, repel, or otherwise control the
growth of pest, plants, animals, and microorganisms. Examples are avicides,
insecticides, and rodenticides.
✔✔Chemical Name - ✔✔The scientific name of the active ingredient(s) found in the
formulated product. This complex name is derived from the chemical structure of the
active ingredients.
✔✔Chemigation - ✔✔The application of fertilizers or pesticides to soil or plants by
inclusion in irrigation water.
✔✔Chemtrec - ✔✔The Chemical Transportation Emergency Center, which has a toll-
free number (1-800-424-9300) that provides 24-hour information for chemical
emergencies such as spills, leaks, fires, or accidents.
✔✔Chemosterilant - ✔✔A chemical compound capable of preventing animal
reproduction.
✔✔Chlorinated Hydrocarbon - ✔✔A pesticide containing chlorine, carbon, and
hydrogen. Many are persistent in the environment. Examples are chlordane, DDT, and
methoxychlor.
✔✔Chlorosis - ✔✔The yellowing of a plant's normally green tissue.
,✔✔Cholinesterase - ✔✔A chemical catalyst (enzyme) found in animals that regulates
the activity of nerve impulses.
✔✔Chronic Toxicity - ✔✔The ability of a material to cause injury from repeated,
prolonged exposure to small amounts. (See Acute Toxicity)
✔✔Commercial Applicator - ✔✔A type of applicator certification or license for an owner
or head of a business that commercially applies pesticides on lands of another.
✔✔Commercial Consultant - ✔✔A type of applicators certification of license for a
salesperson who offers technical advice or recommendations to pesticide users.
✔✔Commercial Operator - ✔✔A type of certification or license for an employee of a
commercial applicator to supervise or apply pesticides on lands of another.
✔✔Common Name - ✔✔A name given to a pesticide active ingredient by a recognized
committee on pesticide nomenclature. Many pesticides are known by a number of trade
or brand names, but the active ingredient(s) has only one recognized common name
(e.g. the common name fro Sevin insecticide is carbaryl).
✔✔Compatible - ✔✔Chemicals that can be mixed without reducing the effectiveness of
any individual chemical.
✔✔Compatibility Agent - ✔✔Adjuvants used to to enhance the effective mixing of tow or
more different pesticides products and/or fertilizers.
✔✔Complete WDO Inspection Reports - ✔✔Usually completed prior to home sales and
contain information about the presence of WDO, damage, and conditions conducive to
infestations.
✔✔Concentration - ✔✔The amount of active ingredient in a given volume or weight of
formulated product.
✔✔Contact Herbicide - ✔✔A chemical that kills primarily by contact with plant tissue,
with little or no translocation.
✔✔Contact Insecticide - ✔✔A compound that causes death or injury to insects upon
contact. It does not need to be ingested to be toxic to insect.
✔✔Contamination - ✔✔The presence of an unwanted substance in or on a plant,
animal, soil, water, air, or structure. (See Residue)
, ✔✔Corrosive Poison - ✔✔A poison containing a strong acid or base which will severely
burn the skin, mouth, stomach, etc.
✔✔Cultural Control - ✔✔A pest management strategy that involves the manipulation of
the environment to avert serious pest damage. Examples are crop rotation and pruning
✔✔Curative Pesticide - ✔✔A pesticide which can inhibit or kill a disease-causing
organism after it is established in the plant or animal.
✔✔Days to Harvest - ✔✔The minimum number of days permitted by law between the
last pesticide application and the harvest date. (Same as Preharvest Interval).
✔✔Days to Slaughter - ✔✔The minimum number of day permitted by law between last
pesticide application and the date the animal is slaughtered.
✔✔Dealer Manager - ✔✔A type of citification of license for an owner or employee of a
business that distributes pesticides (other than for home or garden use) in a store or
outlet
✔✔Decontaminate - ✔✔To remove or break down a pesticide chemical from a surface
or substance.
✔✔Defoliant - ✔✔A chemical that initiates the premature drop of leaves
✔✔Degradation - ✔✔The process by which a chemical compound is broken down to a
simpler compound by the action of microorganisms, water, air, sunlight, or other agents.
Degradation products are usually, but not always, less toxic than the original compound.
✔✔Demonstration and Research - ✔✔A type of applicator certification or license for an
individual who applied experimental or restricted use pesticides for research purposes
under state or federal "Experimental Use Permits"
✔✔Deposit - ✔✔The amount of a pesticide on the treated surface after application
✔✔Dermal toxicity - ✔✔The ability of a pesticide to cause injury to a human or animal
when absorbed through the skin
✔✔Desiccant - ✔✔A chemical that promotes drying or loss of moisture from a leaf or
other plant part.
✔✔Detoxify - ✔✔To render a pesticides active ingredient or other poisonous chemical
harmless
✔✔Diagnosis - ✔✔The positive identification of problem and its cause
EVALUATION EXAM 2025/2026 QUESTIONS AND
ANSWERS GRADED A+
✔✔Calibrate, Calibration - ✔✔To adjust equipment according tho the amount of material
applied to a target area.
✔✔Carbamates - ✔✔A group of pesticides containing nitrogen, formulated as
insecticides (Sevin, Furadan, Lannates), fungicides (Mancozeb, Maneb), and herbicides
(IPC, CIPC).
✔✔Carcinogenic - ✔✔The ability of a substance or agent to induce malignant tumors
(cancer).
✔✔Carrier - ✔✔1) an inert liquid, solid, or gas added to an active ingredient to make a
pesticide formulation.
2) the material, usually water or oil, used to dilute the formulated product or application.
✔✔Casual Organisms - ✔✔The organism (pathogen) that produce a given disease.
✔✔Chemical Control - ✔✔A pest management strategy that involves the use of
naturally derived or synthetic chemicals that kill, attract, repel, or otherwise control the
growth of pest, plants, animals, and microorganisms. Examples are avicides,
insecticides, and rodenticides.
✔✔Chemical Name - ✔✔The scientific name of the active ingredient(s) found in the
formulated product. This complex name is derived from the chemical structure of the
active ingredients.
✔✔Chemigation - ✔✔The application of fertilizers or pesticides to soil or plants by
inclusion in irrigation water.
✔✔Chemtrec - ✔✔The Chemical Transportation Emergency Center, which has a toll-
free number (1-800-424-9300) that provides 24-hour information for chemical
emergencies such as spills, leaks, fires, or accidents.
✔✔Chemosterilant - ✔✔A chemical compound capable of preventing animal
reproduction.
✔✔Chlorinated Hydrocarbon - ✔✔A pesticide containing chlorine, carbon, and
hydrogen. Many are persistent in the environment. Examples are chlordane, DDT, and
methoxychlor.
✔✔Chlorosis - ✔✔The yellowing of a plant's normally green tissue.
,✔✔Cholinesterase - ✔✔A chemical catalyst (enzyme) found in animals that regulates
the activity of nerve impulses.
✔✔Chronic Toxicity - ✔✔The ability of a material to cause injury from repeated,
prolonged exposure to small amounts. (See Acute Toxicity)
✔✔Commercial Applicator - ✔✔A type of applicator certification or license for an owner
or head of a business that commercially applies pesticides on lands of another.
✔✔Commercial Consultant - ✔✔A type of applicators certification of license for a
salesperson who offers technical advice or recommendations to pesticide users.
✔✔Commercial Operator - ✔✔A type of certification or license for an employee of a
commercial applicator to supervise or apply pesticides on lands of another.
✔✔Common Name - ✔✔A name given to a pesticide active ingredient by a recognized
committee on pesticide nomenclature. Many pesticides are known by a number of trade
or brand names, but the active ingredient(s) has only one recognized common name
(e.g. the common name fro Sevin insecticide is carbaryl).
✔✔Compatible - ✔✔Chemicals that can be mixed without reducing the effectiveness of
any individual chemical.
✔✔Compatibility Agent - ✔✔Adjuvants used to to enhance the effective mixing of tow or
more different pesticides products and/or fertilizers.
✔✔Complete WDO Inspection Reports - ✔✔Usually completed prior to home sales and
contain information about the presence of WDO, damage, and conditions conducive to
infestations.
✔✔Concentration - ✔✔The amount of active ingredient in a given volume or weight of
formulated product.
✔✔Contact Herbicide - ✔✔A chemical that kills primarily by contact with plant tissue,
with little or no translocation.
✔✔Contact Insecticide - ✔✔A compound that causes death or injury to insects upon
contact. It does not need to be ingested to be toxic to insect.
✔✔Contamination - ✔✔The presence of an unwanted substance in or on a plant,
animal, soil, water, air, or structure. (See Residue)
, ✔✔Corrosive Poison - ✔✔A poison containing a strong acid or base which will severely
burn the skin, mouth, stomach, etc.
✔✔Cultural Control - ✔✔A pest management strategy that involves the manipulation of
the environment to avert serious pest damage. Examples are crop rotation and pruning
✔✔Curative Pesticide - ✔✔A pesticide which can inhibit or kill a disease-causing
organism after it is established in the plant or animal.
✔✔Days to Harvest - ✔✔The minimum number of days permitted by law between the
last pesticide application and the harvest date. (Same as Preharvest Interval).
✔✔Days to Slaughter - ✔✔The minimum number of day permitted by law between last
pesticide application and the date the animal is slaughtered.
✔✔Dealer Manager - ✔✔A type of citification of license for an owner or employee of a
business that distributes pesticides (other than for home or garden use) in a store or
outlet
✔✔Decontaminate - ✔✔To remove or break down a pesticide chemical from a surface
or substance.
✔✔Defoliant - ✔✔A chemical that initiates the premature drop of leaves
✔✔Degradation - ✔✔The process by which a chemical compound is broken down to a
simpler compound by the action of microorganisms, water, air, sunlight, or other agents.
Degradation products are usually, but not always, less toxic than the original compound.
✔✔Demonstration and Research - ✔✔A type of applicator certification or license for an
individual who applied experimental or restricted use pesticides for research purposes
under state or federal "Experimental Use Permits"
✔✔Deposit - ✔✔The amount of a pesticide on the treated surface after application
✔✔Dermal toxicity - ✔✔The ability of a pesticide to cause injury to a human or animal
when absorbed through the skin
✔✔Desiccant - ✔✔A chemical that promotes drying or loss of moisture from a leaf or
other plant part.
✔✔Detoxify - ✔✔To render a pesticides active ingredient or other poisonous chemical
harmless
✔✔Diagnosis - ✔✔The positive identification of problem and its cause
