How to prevent crop phytotoxicity? Due to the excessive application of pesticides , soil pesticide residues, blind mixed pesticides, improper application time, volatile pesticide droplets, poor pharmaceutical performance, etc., the crops will cause phytotoxicity.
1. Increase pesticide management to eliminate misuse and misuse of pesticides. Before using pesticides, carefully read all the contents on the pesticide label, check the name, dosage form, control object and method of use of the pesticide. If the label on the bottle falls off or is not clear during storage, it should not be used blindly.
2. Strengthen the construction and improvement of the socialized service network for plant protection, and guide farmers to use pesticides correctly, rationally, safely and scientifically.
3, scientific application, improve the quality of application 1 scientific preparation. When preparing the medicament, first prepare the mother liquor, add half of the water to the medicine cabinet, then add the mother liquor, then add enough water to dilute to the required concentration. Stir well when mixing, and add some adhesive to improve the medicine. The physical properties of the liquid.
2 Calculate the accurate weighing correctly and avoid excessive use. When using pesticides, pay attention to the active ingredient content of the drug, accurately match the concentration of the drug solution, and do not increase the concentration and increase the frequency of application.
3 Adjust the spray device and spray evenly. For the knapsack sprayer, the conical nozzle should be changed to a fan-type nozzle, and the serpentine spray should be sprayed in a straight line to reduce the re-spray and improve the spray quality. When spraying, consider the wind direction, pay attention to the protection of nearby sensitive crops, and at the same time, the spray should be even, the fog should be fine, and evenly. The medicine should be thoroughly cleaned before and after use.
4 pay attention to the climate. The temperature is too high, the weather is too hot, the humidity is too high, the rain and dew are not dry, and the wind speed is too high. Do not apply the medicine when it is raining. It is also necessary to avoid the use of pesticides during the sensitive period of the crop.
5 scientific compounding. Generally acidic and alkaline pesticides Mo mixed pesticide, microbial pesticide and chemical fungicides, microbicides Mo mixed, copper and zinc-containing pesticides prime prime Mo mixed pesticide. Mixed pesticides must have clear targets and requirements for prevention and control. After compounding, it is necessary to reduce the cost of prevention and control, but also to increase efficiency and expand the scope of prevention and control; it is necessary to be efficient, low-toxic and low-residue, and to ensure the safety of agricultural products. When mixing pesticides, pay attention to the negative reactions between pesticides, and not interfere with physical, chemical or biological effects.
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