Georgia Pest Control Practice Test

Which pesticide formulation typically has the least visible residue?

1. Emulsifiable concentrates

2. Micro-encapsulated

3. Wettable powders

4. Dusts

The correct answer is: Emulsifiable concentrates

Emulsifiable concentrates are designed to create a mixture that is uniformly distributed in water and often result in a clear or nearly clear solution when diluted. This characteristic allows them to be absorbed by surfaces more effectively, leading to minimal visible residue once they dry. Their formulation includes both oil and water components which can penetrate surfaces, making the residues less noticeable compared to the other formulations. In contrast, micro-encapsulated products create a coating around the active ingredient, which can sometimes be visible, particularly if not applied carefully. Wettable powders and dusts often leave more apparent residues on surfaces due to their solid nature. Wettable powders can leave a chalky residue, while dusts can create a visible layer on surfaces even after application. Thus, emulsifiable concentrates stand out due to their ability to minimize the visible aftermath of treatment, making them an ideal choice when discretion and aesthetics are important.