Pesticide reasonable mix four attention
Rational mixing of pesticides can improve ergonomics, expand the scope of use, treat multiple pests, reduce the amount of drugs used, reduce costs, improve efficacy, reduce toxicity, and reduce pest resistance to pesticides. However, in the compounding of pesticides, the following four points must be noted: First, the chemical stability of the active ingredient should not be affected. The chemical properties and structure of the active ingredients of pesticides are the basis of their biological activity. In the case of mixed use, the chemical composition of the active ingredient should not be allowed to change chemically. One of the possible consequences of this chemical change is the decomposition of the active ingredient. It should be taken seriously. Organic phosphorus and carbamate pesticides are more sensitive to alkalinity, and pyrethroid insecticides and dithioamino fungicides also decompose under strong alkaline conditions. Mixing acidic pesticides with alkaline pesticides can cause complex chemical changes that destroy their active ingredients. Although some pesticides are mixed and used under conditions where alkalinity is not strong, they cannot be stored for too long after mixing. The second is that the physical properties of the agents cannot be destroyed. The two emulsifiable concentrates are required to have good emulsifying, dispersing, and wetting properties. When the two wettable powders are mixed, they are required to have good suspension and wettability and exhibit performance. . This is not only a condition for exerting pharmacological effects, but it can also prevent failure due to changes in physical properties, reduction of efficacy, or occurrence of phytotoxicity. Third, the price of pesticides should be reasonable. In addition to saving time and time when using, the mixed use should generally be lower than the single use cost. The same object of prevention and control is generally mixed with high-cost and low-cost pesticides. As long as there is no resistance, it often has obvious economic benefits. The more expensive new systemic fungicide is used in combination with the less expensive protective agent species; the more expensive pyrethroid pesticides used in combination with organophosphorus pesticides are less expensive than the single use. Fourth, pay attention to the scope of use of mixed drugs. It should be clear that there is a difference between the scope of use of pesticides and the range of use of a single dose of various active ingredients. Mixed pesticides must have their own characteristics in the scope of use, so that mixing can be effective.