Which practice is a core part of resistance management in pesticides?

Which practice is a core part of resistance management in pesticides?

• A. Rotate modes of action.
• B. Use a single pesticide repeatedly.
• C. Apply as much as possible.
• D. Ignore thresholds.

Answer: (A)

Managing pesticide resistance hinges on changing the selective pressure pests face by using products with different modes of action over time. If the same mode of action is used repeatedly, pests with any existing resistance survive and reproduce, steadily building a resistant population. Rotating to pesticides that attack pests in different ways disrupts this fine-tuned survival advantage, making it harder for resistance to spread and helping maintain the effectiveness of tools you have. This approach also helps mitigate cross-resistance that can occur when related products fail for the same reasons. Using a single pesticide over and over accelerates resistance because it continually favors the few individuals that can withstand that specific action. Applying as much as possible increases selection pressure and raises environmental and non-target risks without improving long-term control. Ignoring thresholds leads to mistimed or unnecessary applications, which not only wastes resources but also heightens the chance of resistance development and crop damage.

Managing pesticide resistance hinges on changing the selective pressure pests face by using products with different modes of action over time. If the same mode of action is used repeatedly, pests with any existing resistance survive and reproduce, steadily building a resistant population. Rotating to pesticides that attack pests in different ways disrupts this fine-tuned survival advantage, making it harder for resistance to spread and helping maintain the effectiveness of tools you have. This approach also helps mitigate cross-resistance that can occur when related products fail for the same reasons.

Using a single pesticide over and over accelerates resistance because it continually favors the few individuals that can withstand that specific action. Applying as much as possible increases selection pressure and raises environmental and non-target risks without improving long-term control. Ignoring thresholds leads to mistimed or unnecessary applications, which not only wastes resources but also heightens the chance of resistance development and crop damage.