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

Dust formulations require no water and can be applied directly to dry surfaces without mixing.

Question 2

What is the primary purpose of a sticker adjuvant?

Accepted Answer

To improve adhesion of the pesticide to the target surface

Answer

Stickers (or adherents) improve the adhesion of pesticide deposits to plant surfaces, reducing washoff from rain or irrigation.

Question 3

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

Accepted Answer

Minimize drift and allow precise placement in soil

Answer

Granular formulations are heavy particles that resist drift and can be placed accurately in or on soil.

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

Microencapsulation surrounds the active ingredient in tiny polymer capsules that slowly degrade, providing controlled release.

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

In an oil-in-water emulsion, small oil droplets containing the active ingredient are dispersed in a water carrier with the help of an emulsifier.

(CPA) Certified Pesticide Applicator Practice Test