What is the best management practice for preventing pesticide contamination of surface and groundwater?

• A. Apply pesticides during rain
• B. Use conservation tillage practices
• C. Use more pesticide product
• D. Apply pesticides heavier on certain crops

Answer: (B)

Using conservation tillage practices is recognized as the best management practice for preventing pesticide contamination of surface and groundwater. Conservation tillage helps improve soil structure and increases organic matter, which can enhance the soil's ability to retain water and absorb pesticides more effectively. This practice minimizes soil erosion, reducing the likelihood that pesticides will be washed away by rainfall or irrigation, thus protecting water sources from contamination.

In contrast, applying pesticides during rain can lead to runoff and direct contamination of water bodies, as the rainwater can wash away the pesticides before they have a chance to degrade in the soil. Using more pesticide product does not address the fundamental issue of contamination and may lead to increased environmental risks and resistance in pests. Applying heavier amounts of pesticide on certain crops can also increase the risk of runoff and leaching into groundwater, exacerbating the problem rather than solving it. Therefore, conservation tillage stands out as an effective means of safeguarding water resources while still allowing for agricultural productivity.