1, bogey use of living water preparation of pesticides because of the impurities in the living water, with its dispensing easy to plug the nozzle of the sprayer, but also destroy the liquid suspension and produce precipitation. 2. Avoid preparation of pesticides at the wellhead because well water contains more minerals, especially calcium and magnesium. These minerals are easily mixed with liquid medicines, resulting in precipitation and reduced efficacy. 3, bogey arbitrarily increase the amount of water because too much water, will reduce the concentration of pesticides, spray on the crop leaving only a very small amount of pesticides, not enough to kill the pests, and there will be completely failure, loss of killing ability. 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, bogey in the wind, rainy or hot sun when spraying pesticides will make the pesticide powder or liquid dispersion; and spraying pesticides on rainy days, pharmaceuticals easily washed by rain and reduce efficacy; spraying pesticides under the hot sun, Plant metabolism is strong, stomata leaves open, prone to phytotoxicity, at the same time easy to make the drug volatile, reduce the control effect. Therefore, the best application time should be mastered: 8 to 11 am and 3 to 6 pm. 5. Avoid increasing the amount of pesticides at random. Before the pesticides are allowed to be produced and sold, they must undergo a rigorous field efficacy test, and then determine the actual usage data such as the amount of medication, the time of application, and the number of applications. Therefore, in accordance with the dosage specified in the instructions for use, that can achieve control effect, and increase the amount of drugs not only increase the input, but also make crops produce phytotoxicity, increase pesticide residues in agricultural products, increase environmental pollution. 6, avoid unreasonable mixed pesticides Some pesticides mixed use can increase the control effect, reduce the amount of medication, or to achieve insects, grass or diseases, pests and cure the effect, and more mixed labor. For example, most species of organophosphorus pesticides rapidly decompose and fail when they encounter alkaline pesticides or alkaline media; replacing urea-based herbicides with phosphate-pesticide pesticides will cause serious injury to cotton seedlings; dioscoreacum EC and organic phosphorus. Mixed use of pesticides will make rice unable to decompose the enemy and produce phytotoxicity. When it is necessary to mix pesticides, it is necessary to understand the nature and characteristics of various pesticides, to find out whether they can be mixed, and ask the relevant technicians to guide the use of the best mixture. 7. Avoid use of expired pesticides at will. Pesticides must be used within the warranty period, otherwise they will cause losses. 8, bogey in the flowering period of the crop spraying pesticide crops and fruit trees in the flowering and young fruit, its young organization, weak resistance, and prone to phytotoxicity, so spraying must avoid crop flowering (flowering) period and Young fruit fruit period. 9. Avoid spraying pesticides before crops are harvested. Highly effective Highly toxic pesticides have a residue duration of about 60 days, and high-efficiency, low-toxic pesticides have a residue period of about 15 days. Therefore, no matter food, vegetables or fruit trees are forbidden to be used for pesticides before they are harvested, food or food poisoning will be avoided. 10, avoid abuse of pesticides should be based on the type of crop, the object of control and the performance of pesticides and the corresponding pesticides, so that the right medicine. At the same time, it is necessary to avoid the long-term use of a certain kind of pharmaceuticals. Therefore, multi-species pesticides should be used interchangeably in a region to extend the use period of certain pesticides, achieve scientific control, and reduce costs.
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