MDARD Michigan Core Pesticide Applicator Practice Exam

Which of the following describes nonpersistent pesticides?

1. Pesticides that remain effective for long periods

2. Pesticides that break down quickly after application

3. Pesticides that provide residual control of pests

4. Pesticides that are insoluble in solvents

The correct answer is: Pesticides that break down quickly after application

The classification of nonpersistent pesticides refers to their ability to break down quickly after application. This rapid degradation means that these pesticides do not remain in the environment for extended periods, minimizing their long-term impact on ecosystems, non-target organisms, and human health. Users often select nonpersistent pesticides for situations where temporary pest control is needed without the concerns that accompany prolonged chemical residues in the environment. In contrast, persistent pesticides are designed for longevity and residual control, which is vital in different contexts, but this characteristic does not apply to nonpersistent ones. Additionally, while solubility in solvents is an important chemical property, it does not directly relate to the persistence of a pesticide in the environment.