Which pesticide formulation is normally ready to use and contains a low percentage active ingredient?

• A. Emulsifiable concentrates
• B. Soluble powders
• C. Dusts
• D. Wettable powders

Answer: (C)

Ready-to-use formulations are applied as they are sold, without needing mixing or measuring. Dusts fit this best because they are already a dry powder you apply directly to cracks, crevices, or surfaces, with no preparation required. They also typically contain a relatively low percentage of active ingredient, since the product relies on spreading the fine particles to provide control rather than delivering a concentrated liquid dose.

In contrast, other forms like emulsifiable concentrates, soluble powders, or wettable powders are concentrates or solids that must be diluted or suspended in water before use, and they usually contain a higher active ingredient load to achieve effectiveness after dilution.