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The use of fertilizers to control insects is good
The clever use of fertilizers to kill, refrain, or suppress pests in crops not only saves pesticides, but also increases crop nutrition, increases yield, avoids harm from pesticides, does not harm natural enemies, and does not pollute the environment. It is a new technology in agricultural production. . Nitrogen insecticide: Ammonium bicarbonate has a strong insecticidal effect. When planting sweet potatoes, potatoes and other crops, the use of 15-25 kg of ammonium bicarbonate per acre in combination with farmyard fertilizers can reduce the damage caused by underground pests. 80% or more. Diluting ammonium bicarbonate 80-100 times to spray the cotton plant will not only kill the aphid, but also have the effect of foliar fertilizer. It will use 2% urea solution or 0.5% ammonia solution to spray outside the root when pests occur, which will have a certain impact on pests. The effects of fumigation and corrosion, especially in the control of spider mites such as spider mites, leafhoppers, and thrips, are weak and have a weak resistance to insects. Phosphorus pesticides: Spraying cotton plants with 2% superphosphate calcium leachate can drive off the spawning bollworms and kill cotton spider mites, cockroaches and other pests. This is the most afraid of phosphorus in the oviposition period of cotton bollworms. See the reason for the immediate escape of phosphorus. Therefore, it is possible to leave one line every five lines and not to spray, driving the cotton bollworms to concentrate spawning, and then seize the timely concentration of drugs to kill. Silicon-calcium pesticides: When crops are fertilized, silicon-calcium fertilizers are mixed in. When the crop absorbs silicon, it will accumulate in the epidermis cells of the crops to form a hard epidermis layer, thereby enhancing the resistance to pests. For example, 20 kg of silicon-calcium fertilizer per acre of wheat or rice fields can greatly reduce the risk of armyworm; corn, soybean, kidney bean and sorghum can apply 30 kg of silicon-calcium fertilizer per acre to avoid the hazards of corn borer and soybean meal. Grass ash liquid insecticide: Use 10 kg of grass ash to water 50 kg, soak for a day and night, and take the filtrate to spray, which can effectively control locusts on fruit trees, crops and flowers, and increase potash fertilizer, enhance crop resistance and flowers and young age. The wind resistance of fruit trees. The species of onion onion is harmful to onions, garlic, and leeks. When planting these crops, 20-30 kilograms of fresh plant ash is applied per acre, which can not only control cockroaches and flies, but also increase production. Urine washing mixture insecticide: mu 0.25-0.5 kg urea, plus detergent 0.1 kg, watered 50 kg, mixed into a "urine washing mixture" spray, to prevent crops, vegetables and flowers, fruit trees, spider mites, Aphids and other pests not only have no pollution, but also have the effect of increasing fertilizer.