How to complete the foliar dressing and application at one time

Fertilizers and pesticides are indispensable production materials for modern agriculture. In order to increase the output and quality, the number and type of chemical fertilizers applied by farmers are increasing. Among them, the foliar spray fertilizer has become a technical measure frequently used by farmers, especially fruit growers and vegetable farmers, due to the small amount of fertilizer and quick results. Farmers also regularly spray pesticides to control pests and diseases. Many people try to mix medicinal fertilizers and spray them together. The purpose is to save labor and improve work efficiency. For example, the “one spray, three sprays” technique popularized in the northern wheat heading stage is to mix triadimefon (or diniconazole), imidacloprid (or acetamiprid), and potassium dihydrogen phosphate in one spray. It can not only control wheat rust, powdery mildew and wheat aphids, but also reduce the risk of lodging and dry hot wind, and it has achieved good results in saving labor, increasing production and increasing income. The reason why the “one spray and three defenses” technology is worthy of recognition and promotion is that the timing is appropriate. Because the wheat ear stage is precisely the prevention and control of two diseases and supplemented panicle fertilizer, the key period for increasing the grain weight is 1000 kg. If it is changed at any other time, no targeted compounding may become a waste. As far as the scientific use of pesticides is concerned, the use of clean water to configure the liquid can best guarantee the efficacy.

The key to blending is that the chemical reaction between fungicides and insecticides and between drugs and fertilizers cannot affect the physical properties of drugs and fertilizers, such as solubility, suspension, emulsification, etc. . Of course, no chemical reaction will increase the toxicity of pesticides to humans, animals, plants, and decomposition of pharmaceutical fertilizers. From the perspective of maintaining efficacy, we already know that some pharmaceutical agents cannot be used in combination with alkaline pesticides (lithium-sulfur cocktails, Bordeaux mixture), such as flufenoxuron, diflubenzuron, acetamiprid, triazoni, and other pesticides. Manganese zinc, aluminum triethyl phosphate, caustic soda, metalaxyl, triadimefon, diniconazole, iprodione, kasugamycin, polyoxin, and cinnamidine. By analogy, they cannot be mixed with alkaline or weakly alkaline fertilizers such as ammonium bicarbonate, arbor, cadmium, 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 break down. Herbicides are safe in most cases if used for soil treatment. This is especially the case when they are mixed together with finely moist soil (or water) and mixed together before use. However, if it is used for stem and leaf treatment, it must be very careful. When it is used alone, if the dose is slightly larger or the spraying is uneven, it may cause phytotoxicity, so it is generally not necessary to mix it with fertilizer. If the mixture is used, the herbicide must also be formulated as a mother liquor, and the fertilizer must be first mixed with water before mixing with the mother liquor.

Biological pesticides cannot be mixed with chemical fertilizers or bactericides, because chemical fertilizers and fungicides can kill the beneficial microorganisms and reduce the control effect. In addition, we must pay attention to the special regulations for the use of some drugs, such as a bactericide known as bromo isocyanuric acid, which can treat both fungi, bacteria, and viruses. It is a rare medicine, but there are also provisions that “should not be mixed with other pesticides.” And so on, it should not be mixed with chemical fertilizers.