The so-called pesticide compounding is to arrange different pesticides, which has achieved the purpose of improving the efficacy of the drug. However, not all pesticides can be compounded with each other. What aspects of pesticide compounding should be paid attention to?
1. Hydrolysis Some alkaline pesticides such as Bordeaux mixture, stone sulphur mixture, etc. are mixed with organophosphorus pesticides such as fenthion, parathion, chlorpyrifos and the likes of carbaryl and carbaryl. It is easy to hydrolyze organophosphorus and carbamate pesticides and thus quickly fail.
2, dehydrochlorination Many organochlorine pesticides mixed with alkaline pesticides are prone to dehydrochlorination, such as trichlorfon, dichlorvos, dicofol, etc., thus failing.
3, metal replacement reaction dithiocarbamate such as zinc, zinc and other biocides in the fungicides such as metal ions and copper preparations are prone to displacement, the former generates poorly soluble copper salts, reducing the effectiveness of chemical control In the latter case, the substitution of zinc, manganese, etc. increases the solubility, and it is easy to cause a rash damage to the skin.
4. Other chemical reaction stone sulphur mixture is mixed with copper preparation such as Bordeaux mixture, and vulcanization is reflected, and copper sulfide which is toxic is easily formed. Systemic fungicides such as carbendazim, thiophanate, tricyclazole, etc. have certain stability and are suitable for mixing with many protective fungicides. Phenoxyacetic acid herbicides such as 2, 4 drops, 2 methyl 4 chlorine, etc., are generally relatively stable in chemical properties, and can be mixed with a metal-containing agent to form a salt, but generally do not significantly reduce the efficacy, in herbicides . There are few agents containing metal elements, so the compounding range is also wide.
The most basic principle of pesticide compounding is that the chemical properties do not change. To learn more about pesticides, please pay attention to the Chinese pesticide network.
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