What impact can heavy rains have on pesticide movement?

Heavy rains can significantly enhance runoff and movement of pesticides. When rainfall is intense, the soil can become saturated, leading to increased surface water flow. This flow can carry pesticides that are applied to the land away from the target area and into nearby water bodies, such as rivers, lakes, or streams. The presence of water can also lead to greater leaching, where pesticides move downward through the soil profile, potentially contaminating groundwater.

This effect is particularly critical in areas where pesticides are used near water bodies, as it can lead to unintentional environmental damage, affecting aquatic ecosystems and water quality. Therefore, understanding the relationship between heavy rainfall and pesticide mobility is important for effective pest management and environmental protection.