When using pesticides to control pests and diseases, it often encounters rainy and continuous weather, which affects the control effect. Farmers' friends use the following "six methods" to improve the control effect of rainy days.
First, the use of systemic pesticides. Systemic pesticides can enter the plant through plant roots, stems, leaves, etc., and are imported into other parts. According to reports, one hour after the spraying of tricyclazole, it did not affect the efficacy. About one hour after the application of the phosphonamine, about 50% of the drug amount entered the crop tissue. A few hours after the administration of the systemic pesticides, omethoate and monocrotophos, most of them are absorbed into the tissues by the plants, and the effects are less affected by rainfall. Kung Fu emulsifiable concentrate has strong penetrating power and anti-scouring force, and is also suitable for rainy season application.
Second, the selection of fast-acting pesticides with greater toxicity. Aphids on crops can be killed in a few minutes after application. The phoxim, methomyl, cotton boll, jingling, guangkewei and pyrethroid pesticides have a strong contact action and can kill a large number of pests within 1 hour to 2 hours after application. Although the toxicity of such pesticides is large, it can be greatly reduced by dilution with rainwater after application.
Third, the use of microbial active pesticides. The application of chemical pesticides during the rainy season will reduce the efficacy of the pesticide more or less, and the application of microbial pesticides will increase its efficacy. For example, fungi, bacterial pesticides, the application effect is poor under dry conditions, only in the case of high humidity, especially in the presence of rain or dew, the reproduction speed will be accelerated, and the insecticidal effect will be improved.
Fourth, the use of rain-resistant water-based pesticides. For example, Bordeaux mixture, Green Debao, green lactone, Jinggangmycin, etc., 2 hours to 3 hours after application, even in the case of moderate showers, does not affect the application effect.
5. Add an adhesive to the liquid. When the pharmaceutical liquid is used, an appropriate amount of an adhesive such as washing powder or saponin can enhance the adhesion of the pesticide on the crop and the surface of the pest. It is not easy to wash the medicine in case of moderate or small rain after application. Adding an appropriate amount of highly adhesive mineral oil or vegetable oil, soy flour, starch, etc. to the powder can significantly improve the adhesion.
Sixth, improve the application method. According to the performance of the drug, suitable application methods, such as systemic insecticides, can be used to avoid rainwater scouring and prevent pesticide loss. Appropriate application methods are adopted according to the law of occurrence and activity of pests and diseases. The pests that feed at night, such as rice leaf roller, can be applied at dusk to improve the efficacy.
First, the use of systemic pesticides. Systemic pesticides can enter the plant through plant roots, stems, leaves, etc., and are imported into other parts. According to reports, one hour after the spraying of tricyclazole, it did not affect the efficacy. About one hour after the application of the phosphonamine, about 50% of the drug amount entered the crop tissue. A few hours after the administration of the systemic pesticides, omethoate and monocrotophos, most of them are absorbed into the tissues by the plants, and the effects are less affected by rainfall. Kung Fu emulsifiable concentrate has strong penetrating power and anti-scouring force, and is also suitable for rainy season application.
Second, the selection of fast-acting pesticides with greater toxicity. Aphids on crops can be killed in a few minutes after application. The phoxim, methomyl, cotton boll, jingling, guangkewei and pyrethroid pesticides have a strong contact action and can kill a large number of pests within 1 hour to 2 hours after application. Although the toxicity of such pesticides is large, it can be greatly reduced by dilution with rainwater after application.
Third, the use of microbial active pesticides. The application of chemical pesticides during the rainy season will reduce the efficacy of the pesticide more or less, and the application of microbial pesticides will increase its efficacy. For example, fungi, bacterial pesticides, the application effect is poor under dry conditions, only in the case of high humidity, especially in the presence of rain or dew, the reproduction speed will be accelerated, and the insecticidal effect will be improved.
Fourth, the use of rain-resistant water-based pesticides. For example, Bordeaux mixture, Green Debao, green lactone, Jinggangmycin, etc., 2 hours to 3 hours after application, even in the case of moderate showers, does not affect the application effect.
5. Add an adhesive to the liquid. When the pharmaceutical liquid is used, an appropriate amount of an adhesive such as washing powder or saponin can enhance the adhesion of the pesticide on the crop and the surface of the pest. It is not easy to wash the medicine in case of moderate or small rain after application. Adding an appropriate amount of highly adhesive mineral oil or vegetable oil, soy flour, starch, etc. to the powder can significantly improve the adhesion.
Sixth, improve the application method. According to the performance of the drug, suitable application methods, such as systemic insecticides, can be used to avoid rainwater scouring and prevent pesticide loss. Appropriate application methods are adopted according to the law of occurrence and activity of pests and diseases. The pests that feed at night, such as rice leaf roller, can be applied at dusk to improve the efficacy.
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