Pesticide blending technology is a mixture of two or more pesticides used in the field, called pesticides. The pesticide preparation containing two or more active ingredients prepared by the factory for convenient use is called a pesticide mixture. The control range of most pesticides is limited. Generally, it only works for one or several harmful organisms. In the growing period of crops, different types and different varieties of diseases, insects and grasses may occur at the same time. The purpose of treating several simultaneous pests and treating pesticides rationally is an important means to give full play to the efficacy of the drug, save labor, and prevent it in time. The level of pesticide mixture and the development of the mixture have become an important indicator to measure the level of drug use in a country and the level of pesticide processing technology. At home and abroad, we are actively researching mixed technology and developing it in the direction of diversified use, and there has been a new form of mixing pesticides with chemical fertilizers.
1. Advantages of mixed pesticides:
(1) It can treat two or more diseases, insects and grasses that occur at the same time during the growth period of the crop in one dose, so that multiple repeated field operations can be completed in one time, saving labor and timely prevention.
(2) When the pesticides are mixed, the scope of prevention and treatment can be expanded, and the mixed use of the medicines can complement each other to improve the control effect or prolong the residual effect period.
(3) Mixing pesticides can prevent and overcome the resistance of harmful organisms and prolong the service life of pesticides.
(4) Mixing pesticides can reduce the dosage of pesticides, reduce costs, reduce environmental pollution and harm to natural enemies.
2. Precautions for mixed pesticides (1) No adverse chemical reactions (such as hydrolysis, alkaline hydrolysis, acid hydrolysis or redox reaction) occur between the mixed varieties to ensure normal efficacy or synergism, and do not affect the physical properties of the pesticide. (such as emulsification, reduced levitation rate, etc.). For example, most organophosphorus pesticides cannot be mixed with Bordeaux mixture, stone sulphur mixture, etc., and powders cannot be mixed with wettable powders and soluble powders.
(2) After mixing different varieties, the crops should not be phytotoxic. For example, when the organophosphorus pesticide is mixed with the enemy, the rice will cause phytotoxicity; the mixture of Bordeaux mixture and the stone sulphur mixture will easily cause phytotoxicity to the crop.
(3) After the pesticides are mixed, the toxicity is not increased, and the safety of humans and animals is guaranteed.
(4) Mixing should be reasonable, including reasonable matching between varieties, such as controlling weeds in soybean fields, using nets for catching and covering grass, and then combining them, although it is feasible from the stability of the drug, it belongs to Unreasonable mixing is not effective, and does not expand the scope of prevention and control. Mixed use is not necessary. The cost is reasonable, and the pesticide is mixed to save labor and time and improve economic benefits. If the mixture is made into a mixture, the additional cost is not allowed.
(5) Pay attention to the antagonistic effect between pesticide varieties to ensure the effect of mixing. For example, the combination of bentazon and naputo reduces the control effect on grass weeds due to antagonism.
This article is published by the China Pesticide Network . Please indicate the source.
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