If you rotate your use of products among different classes, it will prevent resistance from building up.

If you rotate your use of products among different classes, it will prevent resistance from building up.

• A. True
• B. False
• C. Sometimes true
• D. Not specified

Answer: (A)

Rotating products from different classes reduces the selection pressure that pests experience, so resistant individuals don’t gain a consistent advantage. If you keep using the same mode of action, any pests that happen to survive will pass that resistance on and the trait can spread through the population. Using products with different modes of action interrupts that single-source pressure, slowing down how quickly resistance builds up. This is a central part of resistance management in structural pest control. It’s usually most effective when combined with proper application rates, avoiding sublethal exposures, and integrating non-chemical controls. While it doesn’t guarantee that resistance will never occur, it greatly lowers the risk compared to using one class repeatedly.

Rotating products from different classes reduces the selection pressure that pests experience, so resistant individuals don’t gain a consistent advantage. If you keep using the same mode of action, any pests that happen to survive will pass that resistance on and the trait can spread through the population. Using products with different modes of action interrupts that single-source pressure, slowing down how quickly resistance builds up. This is a central part of resistance management in structural pest control. It’s usually most effective when combined with proper application rates, avoiding sublethal exposures, and integrating non-chemical controls. While it doesn’t guarantee that resistance will never occur, it greatly lowers the risk compared to using one class repeatedly.