MDARD Michigan Core Pesticide Applicator Practice Exam

Which of the following methods can help delay pesticide degradation?

1. Using only one type of pesticide

2. Spot-treating and applying as needed

3. Applying pesticides every month

4. Increased pesticide concentrations

The correct answer is: Spot-treating and applying as needed

Spot-treating and applying pesticides as needed is an effective method for delaying pesticide degradation. This approach minimizes the amount of pesticide applied to the environment at any one time, thereby reducing the potential for rapid breakdown that can occur with larger applications. When pesticides are applied in targeted areas only, it lessens environmental pressure, allowing for the active ingredients to remain effective for a longer period. Additionally, this method promotes the responsible use of chemicals, encourages more focused control of pests, and can lead to less pesticide runoff, which also contributes to overall efficacy over time. In contrast, the other methods listed might not effectively delay degradation. For example, using only one type of pesticide could lead to resistance in pest populations, which might require more frequent applications or stronger formulations that can lead to quicker degradation. Similarly, applying pesticides every month could lead to over-application, which increases concentrations in the environment and may accelerate breakdown processes. Increased pesticide concentrations can actually promote faster degradation depending on various factors such as environmental conditions and the chemical properties of the active ingredients, potentially leading to a rapid decline in effectiveness. Hence, implementing targeted spot treatments is a prudent strategy for maintaining pesticide effectiveness over a longer duration.