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Phosphate fertilizer kills insects. Helicoverpa armigera is most afraid of phosphorus in the egg stage, and immediately sees phosphorus to escape. According to this characteristic, the cotton can be sprayed with 2% of the superphosphate leaching solution, and the leaves are sprayed every 5 rows, and the cotton bollworm is concentrated to lay eggs, and then concentrated. Another characteristic of Helicoverpa armigera is that when an acid is secreted from cotton, it is clustered to lay eggs. At this time, if sprayed with 2% superphosphate solution, chemical reaction with oxalic acid and folic acid secreted by cotton can make the eggs of the cotton bollworm hard, so that the cotton bollworm larvae can not break the shell and die, thereby achieving harm reduction. purpose.
Nitrogen kills insects. The root spray is applied when the pest occurs with a 2% urea solution, or a 1% ammonium carbonate solution, or a 0.5% aqueous ammonia solution. Because these three kinds of nitrogen fertilizers have strong volatility, they have certain fumigation and corrosive effects on pests, especially for controlling small insects with small body shape and weak endurance, such as red spider, leafhopper and thrips.
Silicon calcium fertilizer kills insects. Silicon-calcium fertilizer is a new type of chemical fertilizer. When the crop is fertilized, it is incorporated into the silicon fertilizer. After the crop is absorbed, the silicon will accumulate in the epidermal cells of the crop to form a hard defense ability. Practice has proved that corn, sorghum, soybeans, kidney beans and other acres of application of silicon calcium fertilizer 20 kg, can avoid the damage of corn mash and beans. In rice, wheat and other crops, 20-30 kg of siliceous calcium fertilizer per acre can greatly reduce the damage of armyworms.
Grass ash kills insects. Use 10 kg of grass ash to water 50 kg, soak for one night and take the filtrate spray, which can effectively control the aphids on fruit trees, crops and flowers, and can add potassium fertilizer, enhance the lodging resistance of crops and the wind resistance of flowers and young fruit trees. . For example, adding appropriate amount of trichlorfon in the ash of the grass can enhance the contact and fumigation effects of the liquid, and improve the killing ability of the pests such as aphids and red spiders. It can also control the aphids of the flies and onion flies, and the control effect can reach more than 90%, which can generally increase crop yield by 15-20%. Flowers such as rose, rhododendron, and oleander, etc., can also be controlled by plant ash if they are harmed by aphids.
Urine wash mixture to kill insects. Use 250-500 grams of urea per mu, add 100 grams of washing powder, 50 kilograms of water, mix and mix to make a "urine wash mixture" spray, which can control crops, vegetables and apple red spiders, aphids and other pests, not only pollution-free, It also has topdressing efficiency.
Source: HC Network
Introduce the specific practice of treating insects with fertilizer
"Pest treatment with fertilizer" is to achieve the purpose of killing crop pests by fertilization. This is the second new method of pest control and pest control promoted in recent years. This method can not only control insects and insects, but also has fertilization efficiency, and does not kill natural enemies of insects, and does not pollute the environment. The specific practices are as follows:
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