How to apply watermelon after the disaster

When watermelons are high in temperature, rainy, and there are many types of pests and diseases, the following six points should be noted when selecting pesticides:
The commonly used systemic pesticides for endogenous pesticides include imidacloprid, insect mites, Wanling, good winter and various organophosphorus pesticides, and aluminum phosphide, acetaminophen, formazan, metalaxyl, and sclerotium. Thiazolone and azole fungicides. Four to six hours after the use of these pesticides, 60% of the active ingredients can be absorbed into the plant organs by the crops. After 6 hours, even after heavy rain, the pests can be killed.
The quick-acting pesticides commonly used in the selection of quick-acting pesticides include imidacloprid, Wanling and pyrethroid insecticides. These pesticides have a strong contact action and can kill pests in 1~2 hours after use.
The main pesticides with strong rain resistance are: multi-antimycin, sclerotium net, Bordeaux mixture, etc. These pesticides are not affected by the shower after 2 to 4 hours of use.
Improve the application method in the rainy season, try to use systemic insecticides, use the fine soil or the deep root application before the pests occur, let the plants absorb and transmit to the whole plant, so that the pests feed After poisoning death. If spraying, it should be selected after rain stop or light rain to improve its control effect.
Adding a synergist in the rainy season, it is best to add an appropriate amount of synergist to the medicament, which can greatly improve the control effect of the medicament. Commonly used synergists are: anti-eliminating, harming flat, neutral detergent or saponin. In addition, adding an appropriate amount of diesel or diesel emulsion to the medicament can also increase the adhesion of the pesticide on the surface of the pest, thereby improving the control effect.
If you spray in the rain or spray it in the rain, and spray it after rain, you should decide whether you need re-injection or refill according to the amount of rainfall and the interval between spraying. When the spraying time and rain interval are 6~8 hours or more. There is no need to refill or re-spray.
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