Structural Pest Control Applicator Practice Exam

Which of the following is a method to minimize pest resistance?

1. Rotating different classes of pesticides.

2. Using the same pesticide repeatedly.

3. Applying pesticides during peak pest times only.

4. Employing only systemic pesticides.

The correct answer is: Rotating different classes of pesticides.

Rotating different classes of pesticides is an effective method to minimize pest resistance. This approach involves using pesticides with different modes of action over time, which helps prevent pests from adapting to a single type of chemical. When pests are continuously exposed to the same pesticide, they can develop resistance, rendering that treatment less effective. By varying the chemical classes and their mechanisms of action, you disrupt the pest's ability to adapt, leading to more effective pest management over the long term. Other methods, such as using the same pesticide repeatedly or applying pesticides solely during peak pest times, do not address the issue of resistance effectively. Reliant use of a single pesticide can increase the likelihood of resistance developing, while timing alone does not change the pesticide's efficacy or prevent resistance if the same chemical is used repeatedly. Employing only systemic pesticides restricts options and might not provide a comprehensive pest management strategy that mitigates resistance development. Therefore, rotation is a crucial tactic in integrated pest management practices to sustain pesticide efficacy.