Texas Pesticide Applicator Practice Exam

Which formulation is ideal for avoiding visible residue while needing moderate agitation?

1. Aerosol

2. Emulsifiable concentrate

3. Wettable powder

4. Granular

The correct answer is: Emulsifiable concentrate

The emulsifiable concentrate formulation is ideal for avoiding visible residue while requiring moderate agitation because it has characteristics that make it effective and easy to apply in various situations. Emulsifiable concentrates are liquids that contain active ingredients dissolved or suspended in a solvent. When mixed with water, they form a stable emulsion that allows for even distribution of the pesticide over the target area without leaving significant visible residues after application. In contrast, aerosol formulations may leave a fine mist but can be less effective in covering larger areas and often require further precautions due to their pressurized nature. Wettable powders can leave visible residues because they consist of solid particles that may settle on surfaces if not adequately agitated, leading to uneven application. Granular formulations are solid and typically sit on the surface of the application area, which might also result in visible residues and could require substantial agitation to mix adequately before application. Therefore, the emulsifiable concentrate strikes a balance between the need for effective application and the aesthetic concern of visible residue while still necessitating moderate agitation to ensure proper mixing.