Which practice describes an effective approach to delaying pest resistance?

Which practice describes an effective approach to delaying pest resistance?

• A. Rotate pesticides with different modes of action over time
• B. Rely on a single pesticide year-round
• C. Apply pesticides more than necessary
• D. Ignore resistance management guidelines

Answer: (A)

Delaying pest resistance comes from rotating pesticides with different modes of action over time. When you keep using the same mode of action, you consistently favor pests that already have or quickly develop tolerance to that mechanism, so resistance builds up in the population. Switching to a different mode of action interrupts that strong, single-source pressure, making it harder for pests to become resistant and helping keep susceptible individuals in the population longer. This approach is most effective when used as part of an integrated resistance-management plan, which can also include monitoring, applying as labeled, and using non-chemical controls when appropriate. If you rely on one pesticide all season, you’re continuously selecting for resistance to that mode of action. Using more pesticide than necessary increases selection pressure and can harm beneficial organisms, while ignoring resistance-management guidelines removes strategies designed to slow resistance.

Delaying pest resistance comes from rotating pesticides with different modes of action over time. When you keep using the same mode of action, you consistently favor pests that already have or quickly develop tolerance to that mechanism, so resistance builds up in the population. Switching to a different mode of action interrupts that strong, single-source pressure, making it harder for pests to become resistant and helping keep susceptible individuals in the population longer.

This approach is most effective when used as part of an integrated resistance-management plan, which can also include monitoring, applying as labeled, and using non-chemical controls when appropriate.

If you rely on one pesticide all season, you’re continuously selecting for resistance to that mode of action. Using more pesticide than necessary increases selection pressure and can harm beneficial organisms, while ignoring resistance-management guidelines removes strategies designed to slow resistance.