Which statement best explains why rotating pesticides is recommended?

Which statement best explains why rotating pesticides is recommended?

• A. It prevents pests from developing resistance
• B. It eliminates the need for pest monitoring
• C. It increases residue levels
• D. It simplifies application schedules

Answer: (B)

Rotating pesticides by using products with different modes of action is a resistance management practice. When the same pesticide is used repeatedly, pests with resistance genes are more likely to survive and reproduce, eventually making that product less effective. Mixing in pesticides that act differently reduces this selection pressure, slowing the evolution of resistance and keeping treatments effective longer. Monitoring pest populations is still essential, so rotation doesn’t eliminate the need to scout and decide when to spray. Residue levels and scheduling aren’t inherently improved by rotation—their outcomes depend on the specific products and timing, and rotating can even complicate planning.

Rotating pesticides by using products with different modes of action is a resistance management practice. When the same pesticide is used repeatedly, pests with resistance genes are more likely to survive and reproduce, eventually making that product less effective. Mixing in pesticides that act differently reduces this selection pressure, slowing the evolution of resistance and keeping treatments effective longer.

Monitoring pest populations is still essential, so rotation doesn’t eliminate the need to scout and decide when to spray. Residue levels and scheduling aren’t inherently improved by rotation—their outcomes depend on the specific products and timing, and rotating can even complicate planning.