In turf IPM, what indicates when to apply a pesticide under the IPM framework?

• A. A fixed calendar date
• B. A grower's preference
• C. An action threshold or disease risk assessment
• D. The pesticide label's maximum rate only

Answer: (C)

In IPM, when to apply a pesticide is determined by monitoring pest or disease levels and using an action threshold or disease risk assessment to decide if control is needed. You actively scout the turf to gauge pest density or disease pressure and compare what you find to a predefined threshold that means protection is warranted to prevent unacceptable damage. If the threshold is reached, or if a disease-risk forecast shows high likelihood, that triggers timely intervention with an appropriate product. This approach targets sprays to when they’ll be most effective and helps minimize unnecessary applications. The label’s maximum rate, on the other hand, tells you the highest amount you can apply at once; it doesn’t dictate when to spray. Always follow label directions while using threshold-based timing.