The application of pesticides should be scientific, especially the application of pesticides in winter greenhouse vegetables. Otherwise, it will not only fail to achieve control effect, but also be prone to phytotoxicity. Therefore, the application of pesticides should pay attention to ten bogey. Do not use live water to make pesticides. Because there are many impurities in the living water, it is easy to plug the sprayer's sprayer with its dispensing, and at the same time, it will also disrupt the liquid suspension and cause precipitation. Second, avoid using well water to prepare pesticides. Because well water contains more minerals, especially calcium and magnesium. The combination of these minerals and liquid chemicals is prone to chemical reactions, resulting in precipitation and reduced efficacy. Three avoid arbitrary increase the amount of water. Because too much water is added, the concentration of pesticides will be reduced, and only a very small amount of pesticides will be left on the crops. It will not be enough to kill the pests, and some will completely fail and lose their ability to kill. Excessive water addition can also result in the loss of pesticides and environmental pollution. Therefore, when formulating pesticides, the amount of water added must be strictly controlled according to their use concentration range. 4. Avoid using pesticides on stormy or hot days. Spraying pesticides when blowing winds will cause pesticide powders or liquids to drift, and spray pesticides on rainy days. The pesticides are easily washed by rain to reduce the efficacy. Spraying pesticides under the hot sun, the plant metabolism is strong, and the stomata of the leaves are open. Harmful, at the same time easy to make the drug volatile, reducing the control effect, therefore, should grasp the best application time, 9-11 am, 3-6 pm is appropriate. Five bogey to increase the amount of pesticides. Because pesticides are subject to strict field efficacy tests before they are allowed to be produced and sold, actual use data such as dosage, time of application, and number of applications are determined. Therefore, according to the dosage prescribed in the instruction manual, the control effect can be achieved, and increasing the dosage will not only increase the input, but also make the crop produce phytotoxicity, increase pesticide residues in agricultural products, and increase environmental pollution. Six bogey unreasonable pesticides mixed. Some combinations of pesticides can increase the control effect, reduce the dosage, or achieve the effects of insects, grasses or diseases, and pest control. Moreover, 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; substitution of urea herbicides and phosphate ester pesticides will cause serious injury to cotton seedlings; dioscorerma emulsion and organic phosphorus pesticides will make rice unable to decompose the enemy and produce drugs. harm. When it is necessary to mix pesticides, be sure to understand the nature and characteristics of various pesticides and find out if they can be mixed. Ask the relevant technicians to use the best ones after mixing them. Seven taboos are free to use expired pesticides. Pesticides must be used within the warranty period, otherwise they will cause losses. Eight bogey spray pesticides during the flowering period of crops. In the flowering and fruiting period of crops and fruit trees, their tissues are tender and their stress resistance is weak, and they are prone to phytotoxicity. Therefore, flowering (flowering) and fruiting young fruit must be avoided during spraying. Nine bogey sprayed pesticides before crops were harvested. The period of high-efficient and highly toxic pesticide residues is approximately 60 days, and the period of high-efficiency and low-toxicity pesticide residues is approximately 15 days. Therefore, no matter food, vegetables, or fruit trees, the use of pesticides should be prohibited before harvest to prevent food or food poisoning. Ten bogey abuse of pesticides. The corresponding pesticide should be used according to the type of crop, the object of control, and the performance of the medicament, so that the right medicine can be prescribed, and at the same time, it is necessary to avoid using a certain kind of medicament for a long time. 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