Pesticide Types & Formulations Flashcards

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

Answer: Emulsifiable concentrates (EC)

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

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

Answer: Remains suspended as particles in water

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

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

Answer: Extended residual activity through slow release

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

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

Answer: Herbicide

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

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

Answer: Much lower volumes per acre

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

Flowable (F) or suspension concentrate (SC) formulations are best described as:

Answer: Finely ground solid particles suspended in liquid

Flowable/SC formulations consist of finely ground insoluble solids suspended in a liquid carrier, requiring agitation during use.

Which formulation is most appropriate when you want to avoid spray drift in windy conditions?

Answer: Granule (G)

Granular formulations are heavy enough to fall to the ground quickly and are much less susceptible to wind drift than sprays or dusts.