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Do not use live water to prepare pesticides. Because there are many impurities in the living water, it is easy to block the nozzle of the sprayer by using the medicine, and it also destroys the suspension of the liquid to cause precipitation.
Second, avoid using well water to prepare pesticides. Because well water contains more minerals, especially calcium and magnesium. These minerals are easily mixed with the chemical solution to produce a chemical action, and the formation of a precipitate reduces the efficacy.
Three bogey increase the amount of water. Because too much water is added, the concentration of pesticides is lowered, and only a small amount of pesticide is left on the crop, which is not enough to kill the pests, and some will completely fail and lose the killing ability. Excessive addition of water can also cause the loss of pesticides and lead to environmental pollution. Therefore, when formulating pesticides, the amount of water added should be strictly controlled according to their concentration range.
Four bogey apply pesticides under wind and rain or hot sun. Spraying pesticides during windy will cause pesticide powder or liquid to scatter, while spraying pesticides on rainy days, the chemicals are easily washed away by rain and reduce the efficacy. Spraying pesticides under the scorching sun, plant metabolism is strong, leaves are open, and drugs are prone to occur. It is easy to make the drug volatilize and reduce the control effect. Therefore, it is advisable to master the best application time, 9-11 am, 3-6 pm.
Five bogey free to increase the amount of pesticides. Because the pesticides must pass the strict field efficacy test before being approved for production and sales, and then determine the actual use data such as the amount of the drug, the time of administration, and the number of times of application. Therefore, according to the dosage specified in the instruction manual, the effect of prevention and treatment can be achieved, and increasing the dosage not only increases the input, but also causes phytotoxicity of crops, increases the residual amount of pesticides in agricultural products, and aggravates environmental pollution.
Six bogey mixed with unreasonable pesticides. Some pesticides can increase the control effect, reduce the dosage, or achieve the effects of pests, grasses or diseases and diseases, and the mixed application is more labor-saving, but some are not. For example, most of the organophosphorus pesticides are alkaline. Pesticides or alkaline media will rapidly decompose and fail; replacing urea herbicides with phospholipid pesticides will cause serious phytotoxicity to cotton seedlings; mixed use of enemy emulsifiable concentrates and organophosphorus pesticides will prevent rice from decomposing enemies and producing drugs. harm. When you need to mix pesticides, you must understand the nature and characteristics of various pesticides, and find out whether it can be mixed. Please use the best guidance from the relevant technicians.
Seven bogey use expired pesticides at will. Pesticides must be used within the shelf life, otherwise it will cause losses.
Eight bogey spray pesticides during the flowering period of crops. In the flowering and young fruit stages of crops and fruit trees, the tissue is young, the resistance to stress is weak, and it is prone to phytotoxicity. Therefore, it is necessary to avoid the flowering (flowering) period and the fruit tree and young fruit period when spraying.
Jiu Ji sprays pesticides before crop harvesting. The period of high-efficiency and highly toxic pesticide residues is about 60 days, and the period of high-efficiency and low-toxicity pesticides is about 15 days. Therefore, whether it is food, vegetables, or fruit trees, it is forbidden to apply drugs before harvesting to avoid food or food poisoning.
Ten bogey abuse pesticides. The corresponding pesticide should be used according to the variety of crops, the object of control and the performance of the drug, so as to cure the problem and avoid using a certain agent for a long time.
Source: Rural Volkswagen
It is scientific to apply pesticides, especially for pesticide application in greenhouse vegetables in winter. Otherwise, not only will it not achieve the control effect, but it will also be susceptible to phytotoxicity. Therefore, attention should be paid to the application of pesticides.
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