Which single action will help decrease resistance?

Which single action will help decrease resistance?

• A. Apply pesticides with varying modes of action over time
• B. Apply the same mode of action repeatedly
• C. Increase spraying frequency without rotation
• D. Ignore monitoring data

Answer: (A)

Rotating products with different modes of action over time slows how quickly pests develop resistance. When a pest population is exposed repeatedly to the same mode of action, individuals with any existing resistance survive and reproduce, and resistance spreads. Using pesticides that affect pests in different ways across applications reduces the selective pressure for a single resistance mechanism, helping keep more pests susceptible. Monitoring data should guide when and what to rotate, so decisions reflect actual pest pressure and resistance signals. Using the same mode of action repeatedly, increasing spray frequency without rotation, or ignoring monitoring data all raise the risk of resistance building up and make control harder over time.

Rotating products with different modes of action over time slows how quickly pests develop resistance. When a pest population is exposed repeatedly to the same mode of action, individuals with any existing resistance survive and reproduce, and resistance spreads. Using pesticides that affect pests in different ways across applications reduces the selective pressure for a single resistance mechanism, helping keep more pests susceptible. Monitoring data should guide when and what to rotate, so decisions reflect actual pest pressure and resistance signals. Using the same mode of action repeatedly, increasing spray frequency without rotation, or ignoring monitoring data all raise the risk of resistance building up and make control harder over time.