CPA Pesticide Types & Formulations 2

Question 1

Which formulation type is most likely to cause phytotoxicity if improperly mixed?

Accepted Answer

Emulsifiable concentrates (EC)

Answer

Emulsifiable concentrates contain solvents and emulsifiers that can damage plant tissue if mixed at incorrect concentrations.

Question 2

A wettable powder (WP) differs from a soluble powder (SP) in that a wettable powder:

Accepted Answer

Remains suspended as particles in water

Answer

Wettable powders do not dissolve but form a suspension requiring continuous agitation, unlike soluble powders that dissolve fully.

Question 3

What is the primary advantage of using a microencapsulated (ME) pesticide formulation?

Accepted Answer

Extended residual activity through slow release

Answer

Microencapsulation surrounds the active ingredient in tiny capsules that break down slowly, extending the period of pest control.

Question 4

Which pesticide type is specifically designed to control unwanted plant species?

Accepted Answer

Herbicide

Answer

Herbicides are pesticides formulated to kill or suppress weeds and other unwanted vegetation.

Question 5

Ultra-low volume (ULV) formulations are typically applied at what rate compared to other liquid formulations?

Accepted Answer

Much lower volumes per acre

Answer

ULV formulations are applied at very low volumes (often less than 0.5 gallons per acre) as highly concentrated sprays.

(CPA) Certified Pesticide Applicator Practice Test