Qiaofei material anti-insect pest

Many fertilizers kill and repel insect pests. Clever fertilization has the effect of controlling pests. Phosphorus fertilizer bollworm is very sensitive to phosphorus during the spawning period, and it escapes when phosphorus is encountered. During the spawning period of cotton bollworm, 2% superphosphate soaking liquid was sprayed, every 5-6 inches, and 1 spray was not sprayed, which can drive the central spawning of the bollworm to concentrate. Silicon-calcium fertilizers such as corn, soybeans and other crops apply 30-40 kg of silicon-calcium fertilizer per acre to avoid the hazards of corn borer and soybean meal. Rice, wheat and other crops, applying 20-30 kg of calcium-silicon fertilizer per mu, can greatly reduce the risk of armyworm. The nitrogen fertilizers urea, ammonium bicarbonate, and ammonia water are three types of nitrogen fertilizers that are volatile and have certain irritating, corrosive, and fumigating effects on pests. 250-800 grams of urea, plus 100 detergent, 150 kg of water sprayed plants, can control red spider, aphids and other pests. Grass ash to take 20 kg of grass ash, soaked with 80 kg of water for a day and night, take the filtrate spray, can effectively control aphids. In the onion, garlic, and leeks, 20-30 kilograms of ash are applied or applied per acre, which can prevent roots and increase yield.

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