Research and practice have proved that the use of chemical fertilizers or organic fertilizers to control pests and diseases of crops is not only economical, safe, and effective, but also can save pesticides. At the same time, it also has the characteristics of fertilizing and does not harm natural enemies, and does not pollute the environment. It is worth mentioning. It is worth it. Promote in production.
Nitrogen fertilizer 1 Ammonium hydrogencarbonate such as ammonium bicarbonate, ammonia, etc. has strong volatility and has certain irritating, corrosive and fumigating effects on pests, especially for insects with small size and weak endurance such as red spider, aphid, and thrips. it is good. Application method: spray evenly with 1% ammonium bicarbonate or 0.5% ammonia solution, spray once every 5-7 days, spray 2-3 times. 2Urea has the effect of destroying the chitin of insects. It is prepared by mixing urea, washing powder and water in a ratio of 4:1:400. It is used for locusts and cabbage worms that harm cotton, vegetables and flowers. Red spider bead and other pests have good control effect. 3 When sporadic wheat rust occurs, spray with 50% fresh urine or 3% ammonium sulfate solution works well.
Phosphate Fertilizer 1 Oxalic acid secreted from the glandular hairs on the cotton head of the cotton bud has an attractive effect on the cotton bollworm moth; in the adult stage of cotton bollworm, the 1-2% superphosphate leachate is used as foliar spray fertilizer, which can cause oxalic acid to become calcium oxalate and lose it. Suspension to the bollworm. In this way, the amount of eggs laid in the cotton field can be reduced by 33.3-73.4%, with an average of 55%; the duration of each spraying of phosphorus is generally 2-3 days. 2 Tomato umbilical rot is a kind of physiological disease caused by plant calcium deficiency. From the beginning of the tomato flowering stage, 1% superphosphate leaching solution was sprayed once every half month, and sprayed 2-3 times, the effect of disease prevention was obvious.
Potassium potassium fertilizer can enhance the resistance of crops, and application of potassium fertilizer has an inhibitory effect on a variety of crop diseases and insect pests. According to reports, 71% and 75% of the 740 fungal diseases and 68 bacterial diseases were reduced due to potassium, and 59% of the 230 species of insect pests were attenuated. In production, the most directly used potassium fertilizer for controlling crop diseases and pests is plant ash. Plant ash is a kind of high-quality potash fertilizer. It also contains phosphorus, calcium, magnesium, sulfur, and various nutrient elements such as boron, manganese, copper, zinc, molybdenum, etc.; it uses 10 kg of plant ash, watered with 50 kg, soaked for 24 hours and filtered. The filtrate spray can effectively kill the aphids on the crops; in the cotton seedling stage, 20-25 kg per acre of grass ash, and spread along the ridge, can increase the temperature, reduce the occurrence of cotton blight, anthrax, red rot, etc. Before planting onions, garlic, or leeks, 20 kg of plant ash per acre is applied to the bottom of the ditch, or 15 kg of plant ash per acre is sown in onions of vegetables such as onions, garlic, and sorghum. It can significantly reduce the damage caused by root pods and increase the yield of vegetables by 15-20%. When the early occurrence of wheat sheath blight occurs, 30-40 kg of plant ash is used per acre. When the dew is not dried in the morning, Shun ridge is withdrawn at the base of the wheat plant. Controlling the spread of diseases has a certain effect; for roots rot occurring in fruit trees, the roots are first dug, the root canals of the disease are scraped off and lightly dried, and then each plant is buried with 2.5-5 kg ​​of plant ash, which is about 1-2 months old. The tree can issue new roots.
After silicon-calcium fertilizer is applied to the silicon-calcium fertilizer crop, most of the silicon is accumulated in the epidermal cells of the crop, forming a very hard epidermis layer. (Feeding Unit: Xinyang Agricultural Technology Station)
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