According to IPM principles, when should chemical control be used?

According to IPM principles, when should chemical control be used?

• A. Before pest identification
• B. After pest identification and when the threshold is exceeded
• C. On a fixed schedule
• D. Whenever pests are noticed

Answer: (B)

In IPM, actions are based on monitoring and thresholds, not on guessing or a fixed schedule. The best time to use chemical control is after you have correctly identified the pest and the pest level has exceeded an action (or economic) threshold. This means you’ve confirmed which pest is present, assessed that its population or the damage it’s causing could lead to unacceptable harm, and determined that intervention is warranted. At that point, a targeted chemical can be used as part of an overall strategy that also includes non-chemical approaches and practices to reduce future problems and protect beneficial organisms. Spraying before identification can lead to wasted resources and unnecessary harm to non-targets, while using chemicals on a set schedule or whenever pests are noticed ignores actual need and can promote resistance and environmental damage.

In IPM, actions are based on monitoring and thresholds, not on guessing or a fixed schedule. The best time to use chemical control is after you have correctly identified the pest and the pest level has exceeded an action (or economic) threshold. This means you’ve confirmed which pest is present, assessed that its population or the damage it’s causing could lead to unacceptable harm, and determined that intervention is warranted. At that point, a targeted chemical can be used as part of an overall strategy that also includes non-chemical approaches and practices to reduce future problems and protect beneficial organisms.

Spraying before identification can lead to wasted resources and unnecessary harm to non-targets, while using chemicals on a set schedule or whenever pests are noticed ignores actual need and can promote resistance and environmental damage.