Organophosphorus, carbamate, pyrethroid insecticides and disulfide carbamate derivative fungicides (Fumeishuang, Daisen Zinc, Mancozeb, etc.) will decompose under alkaline conditions, so they cannot be Mixed with alkaline pesticides, these agents should not be mixed with alkaline stone sulfur and Bordeaux mixture. (However, the acaricide Nissoram has the advantage of being able to be mixed with an alkaline agent, but it is not listed.) Most organic sulfur fungicides are sensitive to acidic reactions and should be used with caution. For example, double-effect spirit (ie, amino acid copper) will resolve copper ions in the presence of acid, which not only reduces the efficacy, but also easily causes phytotoxicity. Some pesticides cannot be mixed with metal ion-containing drugs. For example, methyl thiophanate or disulfide carbamate fungicides should not be mixed with copper preparations.
Can not be mixed after medicinal damage
Stone sulfur mixture and Bordeaux mixture; dithiocarbamate fungicide mixed with copper preparation; thiram, Daisen ring fungicide and alkaline drugs mixed, will produce substances that cause serious phytotoxicity to crops, so can not Mixed.
Pesticides with cross-resistance should not be mixed
For example, the fungicide carbendazim and methyl thiophanate have cross-resistance. Mixing not only does not delay the development of resistance to pathogens, but accelerates the development of drug resistance, so it cannot be mixed.
Physical properties are changed and cannot be mixed
When mixing pesticides , pay attention to whether the physical properties of different components are changed. After mixing, delamination, flocculation and precipitation, emulsion destruction, suspension rate reduction, and even crystallization may not be mixed. When the emulsifiable oil and the water agent are mixed, the liquid medicine liquid can be first dispensed, and the emulsifiable liquid liquid is prepared by using the liquid medicine liquid. Some aquatic pesticides that are acidic and contain a large amount of inorganic salts may be demulsified when mixed with emulsifiable pesticides, and mixing is prohibited. When the organic phosphorus wettable powder is mixed with other wettable powders, the suspension rate will decrease, which may easily cause phytotoxicity and should not be mixed.
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