What is resistance management in pesticide use?

• A. Rotate active ingredients and modes of action to slow resistance development in pests.
• B. Use the same product repeatedly to build habit.
• C. Increase application rates each time.
• D. Avoid using any pesticides.

Answer: (A)

Resistance management is about keeping pesticides effective for as long as possible by slowing the pests’ ability to adapt. The main idea is to vary the tools you use, so no single method gives pests a consistent advantage. Rotating active ingredients and their different modes of action reduces the selection pressure that favors resistant individuals. When pests are exposed to a variety of modes of action over time, survivors from one chemical aren’t always the ones that survive the next, making it harder for resistance to build up in the population. Using labeled rates, applying only when needed, and integrating non-chemical controls (like monitoring, cultural practices, and biological controls) all support this goal and help preserve efficacy.

Using the same product repeatedly keeps selecting for any pests that happen to survive that specific mode of action, speeding up resistance. Increasing application rates tends to increase damage and environmental risks and still drives resistance faster, not slower. Avoiding pesticides altogether avoids control of the pest and doesn’t address resistance management for the pests that are present. Overall, rotating products and modes of action is the most effective way to delay resistance.