Rain washout of pest control agent: when to re-treat plants.

If you sprayed the plants in the evening and rain came by morning, do not rush to do it again right away. If the rain began at least three hours after the procedure, then the plant's leaves have absorbed the agent and it has started to take effect.

The point is that the systemic agent gets inside the plant and spreads throughout all tissues, protecting it. Therefore, even if the rain washed off part of this agent, its effect remains. However, if heavy rain occurs, the agent stops working effectively, so you will need to treat these plants a few days earlier.

As for contact agents, their action is activated only when they come into direct contact with the pests. Rain completely washes it away, so you will have to repeat the treatment procedure very soon.

How to properly spray plants

Make sure to watch the weather outside, as it is best to spray plants in the morning or evening when there is no bright sun, strong wind, or high humidity. The thing is that the solution during heat can leave burns, while wind decreases the treatment's effectiveness.

Moreover, for maximum effectiveness, the leaves on the plants should be dry, and there should be no precipitation for several hours after the procedure. If you know it might rain, it is better to spray the plants on another day or use products with sticking agents that fix them to the plants.