How to improve the effect of the rainy season?

The rainy weather poses obstacles to the control of pests and diseases in crops. To improve the drug use in the rainy season, the following three aspects must be done:
First, the selection of drugs should use quick-acting pesticides and systemic pesticides. For example, in the insecticide, the cockroach, deltamethrin, etc., 1 to 2 hours after application, can kill the pests, even if the rain drenches into the shed, the effect on the efficacy is small. The systemic pesticide can enter the plant through the roots, stems, leaves and other parts of the plant, and is transported to other parts to play a poisonous killing effect within a certain period of time. If the systemic pesticide such as carbendazim is applied for 2 to 3 hours after application, more than 60% of the active ingredient is absorbed into the tissue by the crop, and the effect is not affected by rain showering.
2. Adding an adhesive to the liquid in the preparation of the pesticide, add some adhesives, such as washing powder, saponin, etc. After the application, it is not easy to wash away the liquid after the application. Dropping some diesel or kerosene emulsion into the liquid can also enhance the adhesion of the pesticide to the surface of the pest.
Third, we must grab the rain spray to pay attention to observe the weather changes, seize the rain gap and spray in time, avoid spraying while spraying. Generally, no rain is observed within 8 hours after spraying, and the effect on the efficacy is small.

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