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"To cure pests with fertilizers" is to use fertilizers to achieve the purpose of killing crop pests. This is a new pest control and pest control method that has been promoted and used in recent years. This method can not only control pests, but also has fertilization efficiency, and does not kill natural enemies of pests, and does not pollute the environment. It can be described as a multi-purpose method. Its specific practices are as follows: Phosphorus pesticides. The bollworm is most afraid of phosphorus in the egg stage and immediately sees phosphorus to escape. According to this characteristic, 2% of the superphosphate leaching solution can be used to apply the foliar spray to the cotton, leaving 1 line every 5 lines without spraying, driving the bollworm to spawn centrally, and then collectively destroying. One of the characteristics of cotton bollworm is that when it smells the acid that the cotton secretes, it clusters and lays eggs on it. At this time, if sprayed with 2% superphosphate solution, the chemical reaction with oxalic acid and folic acid secreted by the cotton can make the eggs of the bollworm hardened, so that the bollworm larvae can't be broken and die, so as to reduce the harm. . Nitrogen insecticide. The use of 2% urea solution or 1% ammonium bicarbonate solution, or 0.5% ammonia solution, was used for extra-root spray when pests occurred. Because these two kinds of nitrogen fertilizers have strong volatility, they have certain fumigation and corrosion effects on pests, especially the control of some insects with small size and weak endurance, such as red spider, leafhopper, thrips, and so on. Silicon-calcium pesticides. Silicon-calcium fertilizer is a new type of chemical fertilizer. When the crop is fertilized, silicon fertilizer is incorporated. After the crop is absorbed, silicon will accumulate in the epidermis cells of the crop, forming a hard epidermis layer, making it difficult for pests to invade. Increase crop defense against pests. Practice has shown that corn, sorghum, soybeans, beans and other acres of calcium and calcium fertilizer application of 20 kg, can avoid the hazards of corn borer, bean meal. In rice, wheat and other crops, with 20-30 kg of silicon-calcium fertilizer per acre, can greatly reduce the risk of armyworm. Ashes kill insects. The use of 10 kg of grass ash mixed with water 50 kg, soaked for a day and night, take the filtrate spray, can effectively prevent fruit trees, agricultural crops and flower aphids, and can add potassium fertilizer, enhance the resistance of the crop against lodging and wind resistance of flowers and young fruit trees ability. If appropriate amount of trichlorfon is added to the grass ash liquid, the contact and fumigation effects of the liquid medicine can be enhanced, and the killing ability of the insects such as aphids and red spiders can be enhanced. It can also control the maggots of seed flies and onion flies, and the control effect can reach more than 90%, generally increasing the yield of the crop by 15%-20%. Urine washing mixture kills insects. Mu 250-500 grams of urea, plus 100 grams of washing powder, watered 50 kg, mixed and mixed into a "urine washing mixture" spray, can control crops, Vegetables and apple spider mites, locusts and other pests, as well as top dressing efficiency .