How do pesticides and herbicides mix?
The mixed use of pesticides is a relatively rigorous work, and we must be cautious. It is necessary to clearly know the composition and proportioning method of each drug, and to do several tests before using it in a large area. If it is carried out blindly, it is likely to bring about greater losses. Today, Xiaobian will take you to understand some principles and precautions of pesticide mixing.
The principle of mixing pesticides
1. There is no adverse chemical reaction (such as hydrolysis, alkali hydrolysis, acid hydrolysis or redox reaction, etc.) between the mixed varieties, ensuring normal efficacy or synergy, and does not affect the physical properties of the drug (such as emulsification, low suspension rate) Wait).
For example, most organophosphorus pesticides cannot be mixed with Bordeaux mixture, lime sulfur, etc.; powder cannot be mixed with wettable powder and soluble powder.
2. After the different varieties are mixed, the crops cannot cause phytotoxicity.
For example, the mixed use of organophosphorus pesticides and propanil will cause phytotoxicity to rice, and the mixing of Bordeaux mixture with lime sulphur will easily cause phytotoxicity to crops.
3. After the pesticide is mixed, it will not increase the toxicity and ensure that it is good for humans and animals.
4. Mixing should be reasonable.
Including the reasonable collocation of the species, such as the control of grass weeds in soybean fields, it can be controlled only by taking the net and covering the grass, and then mixing the two. Although it is feasible in terms of chemical stability, it is unreasonable. It does not increase the efficiency and does not expand the scope of prevention and treatment, and it is not necessary to mix them.
