Pesticides with solubility of what level are believed to have a higher likelihood of runoff?

The likelihood of runoff for pesticides is strongly influenced by their solubility in water. Pesticides that exhibit higher solubility levels can easily dissolve in water, which increases their potential to be carried away by surface water during rainfall or irrigation. A solubility of 1 ppm or less indicates that the pesticide has a significant tendency to remain dissolved in water, thereby having a higher chance of being transported into nearby water bodies or groundwater.

When a pesticide is soluble at this level, it means that even small quantities can become mobile in the environment. As a result, if heavy rains occur or if there is significant water movement in the soil, the pesticide may run off with the water, contaminating surrounding ecosystems. Understanding this relationship helps in the management and application of pesticides to minimize environmental impacts and ensure compliance with safety regulations.