The watering in dilemma

In most cases, you do not have to water fungicides in if you plan to irrigate on the same day as application. The reason is that properly formulated systemic fungicides are designed to easily wash off the foliage, and properly formulated contact fungicides are designed to stick to the foliage even during rainfall or irrigation.

Things get trickier when you try to figure out how to handle package-mix combination products that include a contact and systemic product, or a tank…