How to use fertilizer to kill insects?

How to use fertilizer to kill insects? Please introduce the method of using fertilizer to kill insects. You can refer to the following methods: phosphate fertilizer. Helicoverpa armigera is most afraid of phosphorus at egg stage and escapes as soon as it sees phosphorus. According to this characteristic, 2% superphosphate leaching solution can be used to spray cotton leaves, leaving 1 row every 5 rows without spraying, driving the cotton bollworm to concentrate on laying eggs, and then centralized elimination. Helicoverpa armigera has another characteristic, that is, when it comes to the acid secreted by cotton, it gathers on it to lay eggs. At this time, if spraying with 2% calcium superphosphate solution, the chemical reaction with oxalic acid and folic acid secreted by cotton can harden the eggs of cotton bollworm, so that the larvae of cotton bollworm can not break their shells and die, so as to reduce the harm. Nitrogen kills insects. Use 2% urea solution, or 1% ammonium bicarbonate solution, or 0.5% ammonia solution, to spray outside the root when pests occur. Because of their strong volatility, these three kinds of nitrogen fertilizers have a certain fumigation and corrosion effect on pests, especially in the control of some small and weak endurance pests such as red spiders, leaf mites and thrips. Silicon calcium fertilizer is used to kill insects. Silicon-calcium fertilizer is a new type of chemical fertilizer, when crops are fertilized and mixed with silicon fertilizer, after the crops are absorbed, silicon will accumulate in the crop epidermis, forming a hard defense ability. Practice has proved that 20 kg silicon-calcium fertilizer per mu of corn, sorghum, soybean and bean can avoid the harm of corn borer and bean borer. On rice, wheat and other crops, the harm of armyworm can be greatly reduced by using 30 kilograms of silicon-calcium fertilizer per mu. Plant ash kills insects. Soaking 10kg plant ash with 50kg water for one day and night and spraying the filtrate can effectively control aphids on fruit trees, crops and flowers, and can add potassium fertilizer to enhance the lodging resistance of crops and the wind resistance of flowers and young fruit trees. If an appropriate amount of trichlorfon is added to the plant ash solution, the contact and fumigation effect of the solution can be enhanced, and the killing ability to aphids, red spiders and other pests can be improved. It can also control maggots of seed flies and onion flies, and the control effect can reach more than 90%. Generally, it can increase crop yield by 1520%. Rose, rhododendron, oleander and other flowers can also be prevented by plant ash if they are harmed by maggots of seed flies. Urine washing mixture is used to kill insects. 250 MUR 500 grams of urea, 100 grams of washing powder and 50 kilograms of water are mixed to make a "urine washing mixture" spray, which can control crops, vegetables, apple red spiders, aphids and other pests, not only pollution-free, but also has the effect of topdressing. Click to get more compound fertilizer application techniques