When should pesticide applications be avoided to prevent runoff with water-soluble pesticides?

Pesticide applications should indeed be avoided shortly before a rain event or irrigation event because this timing significantly increases the risk of runoff. Water-soluble pesticides, once applied, can easily be washed away by rain or even heavy watering, leading to unintended dispersal into nearby water bodies or non-target areas. This can not only diminish the effectiveness of the pesticide but also pose environmental risks, such as contaminating waterways and affecting aquatic life.

Timing applications around anticipated precipitation or irrigation is crucial for both efficacy and environmental stewardship. Proper planning ensures that the pesticide has adequate time to adhere and take effect before any runoff can occur, ultimately leading to better pest management outcomes and responsible pesticide use.