Chemical fertilizers and pesticides are indispensable means of production for modern agriculture. In order to improve the yield and quality, the number and types of topdressing chemical fertilizers by farmers are increasing. Among them, foliar spraying fertilizers have become farmers, especially fruit farmers and vegetable farmers, because of the small amount of fertilizer used. Technical measures.
On the other hand, farmers have to spray pesticides frequently to control pests and diseases. Many people try to mix medicine and fertilizer and spray them together. The purpose is to save labor and improve work efficiency. For example, the "one spray and three prevention" technology commonly promoted in the northern wheat ear stage is to mix triadimefon (or diniconazole), acetamiprid (or acetamiprid) and potassium dihydrogen phosphate and spray it at once. It can prevent and control wheat rust, powdery mildew and wheat aphids, as well as reduce the damage caused by lodging and dry hot wind, and achieves a good effect of saving labor, increasing production and increasing income. The "one spray and three prevention" technology is worthy of recognition and promotion, first of all, the timing is right. Because the ear period of wheat is just a critical period for the prevention and control of "two diseases and one insect", supplementary application of ear fertilizer and increase of thousand-grain weight, a mixture of pesticides and fertilizers is required. If it is changed to another period, no targeted mixing may become a waste. As far as the scientific use of pesticides is concerned, it is best to use clean water to prepare the liquid to ensure the efficacy.
The key to mixing is that there can be no chemical reactions between fungicides and pesticides and between medicines and fertilizers, and it does not affect the physical properties of medicines and fertilizers, such as solubility, suspension, emulsification, etc., and cannot affect their respective effects. . Of course, if there is no chemical reaction, it will not increase the poison of the medicine to humans, animals, plants and the decomposition of medicine fertilizer. From the perspective of maintaining efficacy, we already know that some agents cannot be mixed with alkaline pesticides (lime sulfur mixture, Bordeaux mixture), such as sulfluramid, diflubenzuron, acetamiprid, triazole tin and other pesticides and substitutes. Mancozeb, aluminum triethylphosphate, oxaxyl, metalaxyl, triadimefon, diniconazole, iprodione, kasugamycin, polyoxin, nanningmycin and other fungicides. Inferringly, they cannot be mixed with alkaline or weakly alkaline fertilizers such as ammonium bicarbonate, plant 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, otherwise they will decompose and fail. If herbicides are used in soil treatment, they are safe in most cases, especially if they are mixed with fine fluvo-aquic soil (or water) and then mixed together before use. But if it is used for stem and leaf treatment, it must be very cautious. When used alone, large doses or uneven spraying may cause phytotoxicity, so generally do not mix with fertilizers. If mixed, the herbicide should be formulated into a mother liquor first, and the fertilizer should be dissolved in water before being mixed with the mother liquor, and the mixture should be sprayed.
Biological pesticides cannot be mixed with chemical fertilizers or fungicides, because chemical fertilizers and fungicides may kill the beneficial microorganisms in them and reduce the control effect. In addition, pay attention to the special regulations for the mixing of some chemicals, such as a fungicide called bromoisocyanuric acid, which can cure fungi, bacteria and even virus diseases. It is a rare good medicine, but there are also some "not suitable for mixing with other pesticides." Regulations, reasoning, and fertilizers should not be mixed.
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