What are the precautions for mixing pesticides with fertilizers?
What are the precautions for mixing pesticides with fertilizers? According to the pH of aqueous solutions, pesticides can be classified into neutral, acidic and alkaline pesticides. Alkaline pesticides include stone sulfur mixture, Bordeaux mixture, rosin mixture, lime, etc.; acidic pesticides include copper sulfate, barium sulfate, zinc sulfate, malathion, etc.; more neutral pesticides, most chemical synthetic pesticides, plant pesticides Microbial pesticides are neutral pesticides. The combination of pesticides and fertilizers should generally follow the following principles: no reduction in fertilizer efficiency and efficacy after mixing. Alkaline fertilizers such as ammonia, lime nitrogen, and ash may not be mixed with acesulfame, thiophanate, jinggangmycin, carbendazim, and pyrethroid pesticides. It is harmless to the crop after mixing. Some pesticides, such as chlorpyrifos and liquid fertilizers, increase the toxicity to crops. The mixture should have a certain stability. For example, when 2,4-D is mixed with calcium, it will remain stable for about 1 month, but some pesticides will fail. After mixing, the application time and the depth of application must take into account the full effect of fertilizer efficiency and efficacy. When the medicine and fertilizer mixture are applied as base fertilizer, the application should be slightly shallow, so that the weed seeds are killed by the herbicide when they are germinated into seedlings. The top dressing is mainly used in the seedling stage. For example, the 4 or 6 leaf stage of corn should be germinated according to weeds. It is applied at the time when the seedlings grow most vulnerable to killing. After the fertilizer and pesticide are mixed, the requirements for fertilizer application and the disease prevention, pest control and herbicide elimination of pesticides are often not completely unified. Therefore, the pesticides based on chemical fertilizers are mainly herbicides with less insecticides and fungicides. less. Alkaline fertilizers such as ammonia, grass ash, etc. are mixed with pesticides such as trichlorfon, dimethoate, methamidophos, carbendazim, methyl thiophanate, carbendazim, leaf sputum, pyrethroid insecticides, etc. Pharmacodynamics. Alkaline pesticides such as stone sulphur mixture, Bordeaux mixture, rosin mixture and the like are mixed with ammonium nitrogen fertilizer such as ammonium hydrogencarbonate, ammonium sulfate, ammonium nitrate and ammonium chloride, and chemical fertilizer such as superphosphate. Otherwise, ammonia will be volatilized and the fertilizer effect will be reduced. Arsenic-containing pesticides such as calcium arsenate and aluminum arsenate are mixed with potassium salts and sodium salt fertilizers, otherwise phytotoxicity may occur due to the production of soluble arsenic. Chemical fertilizers are mixed with microbial pesticides because chemical fertilizers are highly volatile and corrosive. If it is mixed with microbial pesticides such as acaricidal bacteria and green worms, it is easy to kill microorganisms and reduce the control effect. In general, alkaline pesticides should be used alone, but sometimes mixed with other alkaline substances, such as: trichlorfon mixed with soap, the efficacy can be improved. Between acidic pesticides, neutral pesticides, neutral pesticides and acidic pesticides can be mixed, but not all can be mixed. Mixing should be based on the principle of not improving the toxicity of pesticides to humans and animals. Some pesticides such as methyl thiophanate (methylthiophanate) can not be combined with copper preparations, such as copper sulphate, Bordeaux mixture, killable, kebo, copper, green, green, copper, virus A, viral nemesis, Copper acetate and its preparations are mixed. According to the pH of its aqueous solution, chemical fertilizer can be divided into three categories: alkaline, acidic and neutral. Alkaline fertilizers include ammonia, ammonium bicarbonate, calcium magnesium phosphate, and the like. Acidic fertilizers include ammonium sulfate, ammonium chloride, ammonium nitrate, calcium phosphate, potassium dihydrogen phosphate, etc.; neutral fertilizers mainly include urea, potassium sulfate, potassium chloride, potassium nitrate and the like. Alkaline fertilizers should be used alone, but sometimes they can be used with certain fertilizers, such as ammonium bicarbonate and ammonium sulfate, but not for a long time; acidic pesticides and fertilizers can be mixed with neutral fertilizers; neutral pesticides, Fertilizers can also be mixed. Chlorinated fertilizers should not be used on chlorine-repellent crops, such as tobacco, tea, etc., otherwise it will cause damage to crops or affect product quality. Potassium chloride, ammonium chloride and their compound mixtures are those containing chlorinated fertilizers. Special care should be taken when purchasing. In view of the large variety of pesticides and fertilizers, it is not possible to list them here. It is recommended that farmers and friends should consult local agricultural technology departments when mixing, so as to avoid mistakes. This article URL: What are the precautions for mixing pesticides and fertilizers? Ningbo Jiamai Internet Technology CO., Ltd. , https://www.jmcuhyd.com