Fertilizers and pesticides are indispensable means of production for modern agriculture. In order to improve the yield and quality, the number and types of farmers applying chemical fertilizers are increasing. Among them, foliar fertilizers have become the technical measures often used by farmers, especially fruit farmers and vegetable farmers, because of the small amount of fertilizer and quick effect. Farmers should also spray pesticides regularly to control pests and diseases.
Many people try to mix medicines and spray them together, which is designed to save labor and improve work efficiency. For example, in the northern wheat spike period, the "one spray three prevention" technology is to mix triazolone (or diniconazole), imipenem (or acetamiprid) and potassium dihydrogen phosphate, one spray. It can not only control wheat rust, powdery mildew and wheat aphids, but also reduce the damage of lodging and dry hot wind, and achieve good results of saving labor and increasing production and income. The reason why the "one spray three defense" technology is worthy of recognition and promotion is that the timing is appropriate. Because the wheat ear stage is just a critical period for controlling two diseases and one insect and supplementing the ear fertilizer and increasing the 1000-grain weight, it is necessary to mix medicine and fertilizer. If you change to another period, untargeted blending can become a waste. For the scientific use of pesticides, it is best to ensure the efficacy by arranging the liquid with clear water.
The key to mixing is that chemical reactions cannot occur between pesticide fungicides , insecticides, and between drugs and fertilizers, and do not affect the physical properties of drugs and fertilizers, such as solubility, suspension, emulsification, etc., and cannot affect their respective effect. Of course, the chemical reaction will not increase the toxicity of the drug to humans and animals, plants and the decomposition of the drug fertilizer. From the perspective of maintaining efficacy, we already know that some pesticides cannot be mixed with alkaline pesticides (stone sulphur, Bordeaux), such as flubendiamide, chlorfenapyr, acetamiprid, triazole tin and other insecticides. Pesticide sterilizing agents such as manganese sulphate, aluminum triethyl sulphate, oxacillin, metalaxyl, triadimefon, diniconazole, iprodione, chunleimycin, polymycin, and Nanningmycin. Inferentially, they cannot be mixed with alkaline or weakly alkaline fertilizers such as ammonium bicarbonate, ash, calcium, magnesium phosphate, diammonium phosphate, borax and ammonium molybdate.
Some plant growth regulators , such as gibberellin, chlormequat, and ethephon, cannot be mixed with alkaline pesticides or fertilizers, or they will break down. Herbicides, if used in soil treatment, are safe in most cases, especially if they are first mixed with fine tidal soil (or water) and then mixed together before use. However, if it is used for stem and leaf treatment, it should be very cautious. When used alone, the dose may be slightly larger or the spray may be uneven, which may cause phytotoxicity, so generally do not mix with fertilizer. If mixed, the herbicide should be first formulated into a mother liquor. The fertilizer should be first dissolved in water and then mixed with the mother liquor, and it should be sprayed.
Biological pesticides cannot be mixed with chemical fertilizers or pesticides, because chemical fertilizers and pesticides can kill beneficial microorganisms and reduce the control effect. In addition, we must pay attention to the special provisions of some pesticides, such as a pesticide bactericide called chlorobromoisocyanuric acid, which can cure both fungi, bacteria and even viral diseases. It is a rare medicine, but it is also "not suitable for mixing with other pesticides." The rules, reasoning, should not be mixed with fertilizer.
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