Which of the following is a feature of dust pesticides?

Dust pesticides typically contain a low concentration of active ingredients compared to other forms of pesticides, such as liquids or aerosols. This characteristic is aligned with their purpose, which is to settle on surfaces and target pests effectively. The design of dust formulations ensures that they can be applied in a manner that allows the low concentration to adhere to surfaces where pests are likely to come into contact with them, providing a longer residual effect without the need for high concentrations.

In addition, dusts are generally designed for targeted applications, so the reduced concentration helps minimize potential environmental impacts and non-target organism exposure. This feature is particularly important in integrated pest management strategies, where the goal is to control pests while maintaining ecological balance.

The other potential answers do not accurately describe characteristics of dust pesticides. For instance, dust pesticides do not have high water solubility, which is more typical of liquid formulations. Additionally, they do not require constant agitation as some liquid pesticides do; dusts remain stable and do not settle out like suspensions do. Lastly, dust pesticides are not available only in liquid form, as this contradicts the very definition of what dust formulations are.