What are the key steps of an Integrated Pest Management (IPM) program, and how is economic threshold used?

• A. Monitoring and identification, prevention, using multiple tactics (cultural, biological, mechanical), and chemical controls as needed; economic threshold is the pest density at which the cost of damage equals the cost of control, guiding intervention.
• B. Spraying pesticides on a fixed schedule.
• C. Relying solely on resistant varieties; no monitoring.
• D. Economic threshold is the maximum crop yield allowed before action.

Answer: (A)

Integrated Pest Management is about using information to guide actions rather than spraying on a fixed plan. It starts with careful monitoring and correct identification of pests so you know exactly what you’re dealing with. Prevention and cultural practices—like sanitation, crop rotation, proper spacing, and promoting beneficial organisms—reduce pest pressure. When intervention is needed, IPM uses a mix of tactics: cultural, biological, and mechanical methods, with chemical controls used only as a last resort and when truly needed. The economic threshold is the pest density or level of damage at which the expected cost of pest damage equals the cost of control; crossing this threshold triggers action to protect yield and profitability, avoiding unnecessary treatments and reducing environmental impact.

What makes this best is that it reflects the full, integrated approach and the decision point for action. Spraying on a fixed schedule ignores monitoring and economic considerations. Relying solely on resistant varieties without ongoing monitoring misses other pests and dynamic changes in the field. The economic threshold is not a maximum yield limit; it’s the point at which control becomes economically justified.