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Phosphate fertilizer Helicoverpa armigera is sensitive to phosphorus during spawning, and escapes when exposed to phosphorus. During the spawning period of the cotton bollworm, 2% superphosphate leaching solution is sprayed, and every 5 to 6 畦 is left without spraying, which can drive the cotton bollworm to concentrate on spawning, so as to eliminate it centrally.
Silicon-calcium fertilizer, corn, soybean and other crops, 30 to 40 kilograms of silicon-calcium fertilizer per acre, can avoid corn mash and bean worms. Rice, wheat and other crops, 20 to 30 kilograms of silicon and calcium fertilizer per acre, can greatly reduce the damage of sticky insects. Nitrogen fertilizer urea, ammonium bicarbonate, ammonia water, three kinds of nitrogen fertilizers are volatile, and have certain stimulation, corrosion and fumigation effects on pests. Spraying plants with 250-800 g of urea plus 100 kg of washing powder and 150 kg of water can control pests such as red spiders and aphids.
The grass ash is taken from 20 kg of grass ash, soaked in 80 kg of water for one day and night, and the filtrate is sprayed to effectively control the mites. In the onion, garlic, and leeks, 20 to 30 kilograms of grass ash per acre of ditch can not only prevent root lice but also increase yield. (Tangyin County Science and Technology Bureau Zhang Zhiyong Liu Xinguang)
Henan Daily Rural Edition
Apply fertilizer to prevent pests
Many fertilizers have killing and repellent effects on pests, and ingenious fertilization has the effect of controlling pests.
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