What is the recommended method to prevent contamination of surface water and groundwater by pesticides?

• A. Best management practices should be implemented
• B. Apply pesticides during rainfall to wash them away
• C. Use the most water-soluble pesticides
• D. Ignore runoff controls

Answer: (A)

Preventing contamination of surface water and groundwater by pesticides is achieved by following best management practices. These practices reduce the movement of pesticides off the field by guiding how and when pesticides are stored, mixed, loaded, and applied, as well as how fields are managed after application. Key elements include calibrating equipment to apply the correct rate, applying only under appropriate conditions (avoiding rain, heavy wind, or saturated soils), using buffer zones and drift-reduction techniques, and handling spills and cleanup properly. By addressing the main pathways of contamination—runoff, leaching, and drift—these practices provide the most reliable protection for water resources. Choices that involve applying during rain, using highly water-soluble pesticides, or ignoring runoff controls would increase contamination risk.