Which strategy can help reduce non-point source pesticide pollution?

Implementing contour farming is an effective strategy to reduce non-point source pesticide pollution because it involves plowing and planting across the slope of the land, following its natural contours. This method helps to slow water runoff, which in turn reduces soil erosion and the potential for pesticides to wash into nearby water bodies during rain events. By minimizing runoff, the amount of pesticides that enter the water supply is significantly decreased, which is crucial for protecting aquatic ecosystems and maintaining water quality.

In contrast, options like increasing surface irrigation and using more pesticides would likely exacerbate the issue of pesticide pollution rather than mitigate it. Additionally, planting monoculture crops can lead to increased pest pressure, which may incentivize the excessive use of pesticides, thus contributing to non-point source pollution. Effective agricultural practices such as contour farming not only enhance soil conservation but also promote sustainable pesticide use by reducing the need for chemical applications.