Massachusetts Pesticide
License Exam Study Guide –
Practice Questions with
Answers. GRADED A+. Latest
2026/2027 Update.
absorption - Ans✔✔-the movement of a chemical into plants, animals
(including humans), microorganisms or soil
Acaricide - Ans✔✔-a pesticide used to control mites and ticks. a Miticide is a
type of acaricide
Acidic - Ans✔✔-having a ph less than 7
Acidifiers = Buffers - Ans✔✔-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 - Ans✔✔-a predetermined level of pest infestation or damage
at which some type of pest management action must be taken
, Activated Charcoal - Ans✔✔-A finely ground charcoal that adsorbs chemicals.
Active Ingredient (AI) - Ans✔✔-The chemical or chemicals in a product
responsible for pesticidal activity.
Acute effect - Ans✔✔-a symptom, illness, or injury that occurs shortly after the
exposure to a pesticide
Acute Exposure - Ans✔✔-An exposure to a single dose of pesticide
Acute Rodenticide - Ans✔✔-a pesticide that is capable of killing a rodent after a
single feeding
Acute Toxicity - Ans✔✔-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) - Ans✔✔-a substance added to a pesticide to improve its
effectiveness or safety
Adsorption - Ans✔✔-the process whereby chemicals are bound to a surface by
physical or chemical attraction
Adulterated Pesticide - Ans✔✔-A pesticide that does not conform to the
specified standard or quality as documented on its label or labeling
License Exam Study Guide –
Practice Questions with
Answers. GRADED A+. Latest
2026/2027 Update.
absorption - Ans✔✔-the movement of a chemical into plants, animals
(including humans), microorganisms or soil
Acaricide - Ans✔✔-a pesticide used to control mites and ticks. a Miticide is a
type of acaricide
Acidic - Ans✔✔-having a ph less than 7
Acidifiers = Buffers - Ans✔✔-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 - Ans✔✔-a predetermined level of pest infestation or damage
at which some type of pest management action must be taken
, Activated Charcoal - Ans✔✔-A finely ground charcoal that adsorbs chemicals.
Active Ingredient (AI) - Ans✔✔-The chemical or chemicals in a product
responsible for pesticidal activity.
Acute effect - Ans✔✔-a symptom, illness, or injury that occurs shortly after the
exposure to a pesticide
Acute Exposure - Ans✔✔-An exposure to a single dose of pesticide
Acute Rodenticide - Ans✔✔-a pesticide that is capable of killing a rodent after a
single feeding
Acute Toxicity - Ans✔✔-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) - Ans✔✔-a substance added to a pesticide to improve its
effectiveness or safety
Adsorption - Ans✔✔-the process whereby chemicals are bound to a surface by
physical or chemical attraction
Adulterated Pesticide - Ans✔✔-A pesticide that does not conform to the
specified standard or quality as documented on its label or labeling
