MDARD Michigan Core Pesticide Applicator Practice Exam

What characterizes persistent pesticides?

1. They remain inactive for extended periods

2. They offer immediate but short-term protection

3. They remain active for a duration after application

4. They are less effective over time

The correct answer is: They remain active for a duration after application

Persistent pesticides are characterized by their ability to remain active for an extended duration after application. This property means that they continue to exert their effects on target pests well beyond the initial application time. This prolonged activity can lead to longer-lasting pest control, making these pesticides advantageous in certain scenarios where immediate and sustained action is required. The other options do not accurately describe persistent pesticides. Some may suggest that they remain inactive for extended periods, which contradicts the definition, as persistence implies continued activity. Offering immediate but short-term protection indicates a quick but fleeting impact, which is not the case for persistent pesticides. Lastly, stating that they are less effective over time mischaracterizes persistence, as it suggests a decline in effectiveness, whereas persistent pesticides maintain their activity for an extended period.