CPA Pesticide Formulations and Adjuvants 2

Question 1

Which formulation type is most appropriate when applying a pesticide to a dusty, dry surface where water is scarce?

Accepted Answer

Dust (D)

Answer

Wettable powder (WP)

Answer

Emulsifiable concentrate (EC)

Answer

Flowable (F)

Question 2

What is the primary purpose of a sticker adjuvant?

Accepted Answer

To improve adhesion of the pesticide to the target surface

Answer

To lower the pH of the spray solution

Answer

To help the pesticide penetrate the plant cuticle

Answer

To reduce foaming during tank mixing

Question 3

Granular (G) formulations are preferred for soil applications primarily because they:

Accepted Answer

Minimize drift and allow precise placement in soil

Answer

Break down faster in sunlight than liquid formulations

Answer

Require less active ingredient per acre

Answer

Can be mixed with any liquid carrier

Question 4

A microencapsulated (ME) pesticide formulation releases the active ingredient slowly because:

Accepted Answer

The active ingredient is coated in a polymer shell that degrades over time

Answer

The active ingredient is suspended in oil droplets

Answer

The active ingredient is diluted with inert clay particles

Answer

The active ingredient is neutralized by buffering agents

Question 5

Which statement best describes an oil-in-water emulsion in a pesticide spray tank?

Accepted Answer

Oil droplets are dispersed throughout a water carrier

Answer

Water droplets are dispersed throughout an oil phase

Answer

Oil and water are chemically bonded together

Answer

Oil coats the outside of wettable powder particles

Question 6

What role does a compatibility agent play when mixing two pesticides in the same tank?

Accepted Answer

It prevents physical or chemical incompatibilities that could cause separation or loss of efficacy

Answer

It lowers the concentration of both pesticides to safe levels

Answer

It increases the toxicity of the mixture to target pests

Answer

It eliminates the need for personal protective equipment

Question 7

Soluble powder (SP) formulations differ from wettable powders (WP) in that soluble powders:

Accepted Answer

Dissolve completely in water to form a true solution

Answer

Must be agitated constantly during application

Answer

Require an emulsifier to mix with water

Answer

Release active ingredient more slowly than WP formulations