Pesticide Types & Formulations Flashcards
7 cards from real CPA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Pesticide Types & Formulations flashcards as text
Which statement best describes a contact pesticide?
Answer: It kills pests upon direct physical contact with the pesticide
Contact pesticides kill pests when the chemical directly touches the pest's body, requiring thorough coverage of treated surfaces.
A 'ready-to-use' (RTU) pesticide formulation requires the applicator to:
Answer: Apply it directly without any dilution
RTU formulations are pre-diluted by the manufacturer for direct application, making them convenient but usually more expensive per unit of active ingredient.
Which type of insecticide mode of action disrupts the nervous system by inhibiting acetylcholinesterase?
Answer: Organophosphate
Organophosphate insecticides inhibit acetylcholinesterase, causing nerve signal accumulation and eventual death in the target insect.
When a pesticide label lists 'inerts' or 'inert ingredients,' these are substances that:
Answer: Have no biological activity and serve as carriers or formulants
Inert ingredients are non-pesticidal components such as solvents, carriers, emulsifiers, and stabilizers that help deliver the active ingredient.
Biological pesticides (biopesticides) derived from microorganisms, such as Bacillus thuringiensis (Bt), are classified as:
Answer: Microbial pesticides
Microbial pesticides use microorganisms like bacteria, fungi, or viruses as the active ingredient to control pest populations.
An applicator notices a pesticide formulation separates into layers when stored. This is most likely a sign that:
Answer: The emulsion has broken down and the product may be compromised
Separation or layering in emulsifiable concentrates or flowables indicates the emulsion has broken, which can affect the distribution of active ingredient.
Which formulation type would be most appropriate for treating a termite infestation in soil around a structure's foundation?
Answer: Liquid emulsifiable concentrate diluted for soil injection
Liquid formulations diluted for soil injection create a chemical barrier in the soil that termites must pass through, providing structural protection.