Which pesticide formulation is generally made from solids and does not dissolve in water or oil, often used for direct applications?

Dusts are a type of pesticide formulation made primarily from solid particles that do not dissolve in water or oil, making them suitable for various direct application methods. They can easily adhere to surfaces, which facilitates effective pest control by allowing the active ingredient to remain where it is needed to manage pests effectively. Dust formulations are particularly useful in treating cracks, crevices, and other hard-to-reach areas where pests may hide.

The other formulations mentioned have different properties: flowables consist of liquid suspensions that can mix with water and are designed to be diluted before application; aerosols are typically premixed products that disperse pesticide as a fine mist and involve propellants; and wettable powders must be mixed with water to create a sprayable solution. Each of these formulations serves distinct purposes in pest management, but dusts stand out for their solid-based composition and direct application capabilities.