Massachusetts Pesticide License Exam
2026 Questions and Answers
absorption - Correct answer-the movement of a chemical into plants, animals
(including humans), microorganisms or soil
Acaricide - Correct answer-a pesticide used to control mites and ticks. a Miticide is
a type of acaricide
Acidic - Correct answer-having a ph less than 7
Acidifiers = Buffers - Correct answer-adjuvants used to retard chemical
degradation of pesticides in the spray tank by lowering the pH of alkaline water
used as a diluent
Action Threshold - Correct answer-a predetermined level of pest infestation or
damage at which some type of pest management action must be taken
Activated Charcoal - Correct answer-A finely ground charcoal that adsorbs
chemicals.
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,Active Ingredient (AI) - Correct answer-The chemical or chemicals in a product
responsible for pesticidal activity.
Acute effect - Correct answer-a symptom, illness, or injury that occurs shortly after
the exposure to a pesticide
Acute Exposure - Correct answer-An exposure to a single dose of pesticide
Acute Rodenticide - Correct answer-a pesticide that is capable of killing a rodent
after a single feeding
Acute Toxicity - Correct answer-The ability of a pesticide to cause illness after a
single exposure. LD50 and LC50 are common indicators of the degree of acute
toxicity
Adjuvant (Additive) - Correct answer-a substance added to a pesticide to improve
its effectiveness or safety
Adsorption - Correct answer-the process whereby chemicals are bound to a surface
by physical or chemical attraction
Adulterated Pesticide - Correct answer-A pesticide that does not conform to the
specified standard or quality as documented on its label or labeling
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, Aerosol - Correct answer-a liquid formulation that produces a mist or fod when
applied from a container in which it is held under pressure or from a fod-
generating machine
Agitation - Correct answer-The process of stirring or mixing the contents of a
spray tank
Air-blast sprayer - Correct answer-A type of pesticide application equipment that
uses a large volume of air moving at high speed to break up and disperse spray
droplets from the nozzles
Algae - Correct answer-relatively simple plants that are photosynthetic and contain
chlorophyll
Algaecide (algicide) - Correct answer-a pesticide used to kill or inhibit algae
Alkaline - Correct answer-having a pH greater than 7, als
Allergic Effects - Correct answer-a hypersensitivity to a specific substance which
is not due to the substance's toxicity
annual - Correct answer-a plant that completes its life cycle in one year
antidote - Correct answer-a practical treatment used to counteract the effects of
pesticide poisoning
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2026 Questions and Answers
absorption - Correct answer-the movement of a chemical into plants, animals
(including humans), microorganisms or soil
Acaricide - Correct answer-a pesticide used to control mites and ticks. a Miticide is
a type of acaricide
Acidic - Correct answer-having a ph less than 7
Acidifiers = Buffers - Correct answer-adjuvants used to retard chemical
degradation of pesticides in the spray tank by lowering the pH of alkaline water
used as a diluent
Action Threshold - Correct answer-a predetermined level of pest infestation or
damage at which some type of pest management action must be taken
Activated Charcoal - Correct answer-A finely ground charcoal that adsorbs
chemicals.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,Active Ingredient (AI) - Correct answer-The chemical or chemicals in a product
responsible for pesticidal activity.
Acute effect - Correct answer-a symptom, illness, or injury that occurs shortly after
the exposure to a pesticide
Acute Exposure - Correct answer-An exposure to a single dose of pesticide
Acute Rodenticide - Correct answer-a pesticide that is capable of killing a rodent
after a single feeding
Acute Toxicity - Correct answer-The ability of a pesticide to cause illness after a
single exposure. LD50 and LC50 are common indicators of the degree of acute
toxicity
Adjuvant (Additive) - Correct answer-a substance added to a pesticide to improve
its effectiveness or safety
Adsorption - Correct answer-the process whereby chemicals are bound to a surface
by physical or chemical attraction
Adulterated Pesticide - Correct answer-A pesticide that does not conform to the
specified standard or quality as documented on its label or labeling
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
, Aerosol - Correct answer-a liquid formulation that produces a mist or fod when
applied from a container in which it is held under pressure or from a fod-
generating machine
Agitation - Correct answer-The process of stirring or mixing the contents of a
spray tank
Air-blast sprayer - Correct answer-A type of pesticide application equipment that
uses a large volume of air moving at high speed to break up and disperse spray
droplets from the nozzles
Algae - Correct answer-relatively simple plants that are photosynthetic and contain
chlorophyll
Algaecide (algicide) - Correct answer-a pesticide used to kill or inhibit algae
Alkaline - Correct answer-having a pH greater than 7, als
Allergic Effects - Correct answer-a hypersensitivity to a specific substance which
is not due to the substance's toxicity
annual - Correct answer-a plant that completes its life cycle in one year
antidote - Correct answer-a practical treatment used to counteract the effects of
pesticide poisoning
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
