Which of the following is a common dry pesticide carrier?

• A. Attapulgite
• B. Kaolinite
• C. Vermiculite
• D. Corn cob

Answer: (A)

In dry pesticide formulations, a carrier is an inert material that dilutes the active ingredient and helps the powder flow evenly, resist clumping, and apply consistently. Attapulgite is a common dry carrier because its fine, needle-like clay structure provides a large surface area and strong dispersion, which helps keep the active ingredient evenly distributed and reduces caking or clumping, even in some humidity. It’s also chemically inert and compatible with many pesticides, making it a reliable, stable choice for dusty, dry formulations. Kaolinite and vermiculite are clays with useful properties, but they don’t offer the same combination of dispersion and anti-caking performance as attapulgite in many dry-pesticide applications. Corn cob is an organic filler, but it can be less stable and variable in performance. So attapulgite stands out as the typical dry pesticide carrier.