What is a reason to perform a follow-up evaluation after pesticide application?

• A. To determine the cost of the pesticides used.
• B. To assess pest suppression, detect resistance or resurgence, and determine if additional treatments are necessary.
• C. To measure how pretty the field looks.
• D. To compare different brands of pesticides.

Answer: (B)

Follow-up evaluation after applying a pesticide focuses on whether the pest suppression actually happened, whether pests are resisting the pesticide or coming back (resurgence), and whether another treatment is needed. This step is essential because field conditions, pest biology, and coverage can all affect how well the product works. By reassessing pest levels and crop conditions after an initial treatment, you can decide if additional control is required, adjust strategies, and avoid wasting inputs or causing unnecessary environmental impact.

Other options don’t fit this purpose: simply measuring cost doesn’t tell you if the pest control worked; judging how the field looks aesthetically isn’t about effectiveness; and comparing brands doesn’t assess how well the product performed in the field.