Which of the following is a recommended approach to managing resistance in pest populations?

• A. Combine cultural, mechanical, biological, and chemical control measures
• B. Rely only on chemical controls
• C. Use the most potent pesticide available every time
• D. Treat at random life stages

Answer: (A)

Combining cultural, mechanical, biological, and chemical controls slows resistance by reducing reliance on any single method. When pests face several different pressures, the chance that individuals resistant to all of them will dominate is much lower, so resistance develops more slowly. Relying only on chemical controls lets survivors of that mode of action reproduce and spread resistance quickly, while applying the most potent pesticide every time and treating at random life stages can miss vulnerable periods and select for resistant individuals. An integrated approach also helps keep pesticides effective longer and often reduces overall pest damage and environmental impact.