In the rainy season, the temperature is high and the humidity is high. This hot, rainy weather can easily cause crop pests and diseases. Spraying various pesticides on rainy or cloudy days or raining after application of pesticides will dilute or wash off the pesticides, affect the effect of insecticide and disease elimination, and pollute the waters, causing poisoning to humans and animals. So, what are the tricks for spraying pesticides in the rainy season? Use pesticides such as omethoate, carbofuran, monocrotophos and other fungicides and bactericides such as carbendazim, thiophanate-methyl, and tricyclazole. After 6 hours, more than 60% of the active ingredients were absorbed by the crops. Even after 6 hours of raining, the insecticides can still kill insects. The use of quick-acting pesticides such as methamidophos, monocrotophos, and extinct killer pesticides in insecticides has a strong contact effect, killing pests within 1-2 hours of use. The use of such pesticides can avoid the weakness of chronic pesticides due to the loss of efficacy in rainy days. Rain-resistant pesticides can be used for rain-resistant pesticides such as Jinggangmycin and Bordeaux mixture, which means that 2-4 hours after use, it will not affect the efficacy of the drug. The addition of an adhesive agent, also called a wetting agent and a spreading agent, to an agricultural chemical is an auxiliary agent that reduces the surface tension of the chemical solution and allows the chemical solution to easily wet the surface of the crop. Adding the adhesive to the liquid can increase the ability of the pesticide on the surfaces of crops and insects, and reduce the loss of wind and rain on the chemicals. Commonly used adhesives include hide glue, soap, soy flour, various pulp waste liquids, Lactobacillus, polyvinyl alcohol and synthetic detergent powder. The specific use of the method, the synthetic detergent powder, for example, take one thousandth of the weight of the liquid detergent powder, fully dissolved in water and stir in the liquid spray. It is noteworthy that not all pesticides can be added with these adhesives, and acidic or slightly acidic pesticides cannot be added with an adhesive because alkaline adhesives neutralize acidity and affect the efficacy. Pesticides that can be used in combination with laundry detergent include "chlorothalonil", "acaricide", "phoxim", and "bordeaux fluid". Pesticides that cannot be used in combination include "Dyson-ammonium" and "Fumei". "Teubacter," "Topoxine," "dibromophosphorus," and "lithium sulfur" and the like.
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