Wyoming Pesticide Applicator Certification Practice Test

What is a key characteristic of Dusts in terms of application?

1. Always used dry

2. Mix with water and form a true solution

3. Contain water soluble pesticide dispersed in oil carrier

4. Forms a suspension when ready to use

The correct answer is: Always used dry

Dusts are a type of pesticide application that must be used completely dry in order to be effective. This means that they cannot be mixed with water or any other solution, unlike other forms of pesticides such as sprays or granules. Mixing dusts with water will not result in the desired effectiveness and may even render the dust useless. Option B is incorrect because dusts do not mix with water, as mentioned earlier. In addition, a true solution is a mixture where all the components are evenly distributed and do not settle out. This does not apply to dusts, as they need to be applied as a dry powder. Option C is incorrect because dusts are not made up of a combination of oil and water pesticide solutions. Instead, the pesticide is solely dispersed in oil. Option D is incorrect because dusts do not form a suspension. While a suspension is a liquid with solid particles that will eventually settle out, dusts are dry and must be applied as such for efficacy.