Using chemical fertilizers to control crop pests and diseases ingeniously will not only cause no phytotoxicity to crops, but it will also be economical, safe, and effective. It can be described as one bird with two birds and one stone with two birds. Today and everyone simply talk about how to use chemical fertilizers to control pests of crops.
Clever application of nitrogen fertilizer pest control
The use of nitrogenous fertilizer, urea, ammonium bicarbonate, and ammonia water killing insecticides all have strong volatility, and they have irritating, corrosive, and fumigating effects on pests. In particular, control effects are particularly good on spiders such as spider mites, leafhoppers, aphids, and thrips, which have small size and weak endurance.
1. When planting sweet potatoes, potatoes and other crops, 15 kg - 25 kg of ammonium bicarbonate per acre mixed with farmyard fertilizers into the soil can reduce the damage of earthworms by more than 80%.
2. When 25 kg of ammonium bicarbonate is applied per acre for each kind of vegetable, it can greatly reduce the damage of underground pests such as root worms and small ground tigers. It can dilute 80-100 times of ammonium bicarbonate to spray cotton, which can kill aphids. Foliar spray fertilizer effect.
3. When sporadic wheat rust occurs, spray with 50% fresh urine or 3% aqueous solution of ammonium sulfate has good results.
Phosphate fertilizer can be sterilized
1. The oxalic acid secreted by the glandular hairs on the cotton heads has an attractive effect on the cotton bollworm moth; in the adult stage of the cotton bollworm, the 1-2% superphosphate leachate is used as foliar spray fertilizer to make oxalic acid become calcium oxalate. Loss of attraction 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 spray 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 even sprayed 2-3 times, the effect of disease prevention was obvious.
Potassium Fertilizer Five Methods
Potassium fertilizers enhance the stress resistance of crops, and increasing potassium fertilizers has an inhibitory effect on a variety of crop pests and diseases.
1. Use 10 kg of plant ash, 50 kg of water, filter after soaking for 24 hours, and take the filtrate to spray, which can effectively kill the aphids on the crop.
2. In the cotton seedling stage, 20-25 kg per mu of grass ash, spreading in the ridge can increase the temperature of the soil and reduce the occurrence of cotton blight, anthrax, and red rot.
Before planting the onion, garlic or leeks, use 20 kg of plant ash per acre and apply it to the bottom of the ditch, or add 15 kg of plant ash per acre to the vegetable seedlings of onions, garlic, and leeks, and then plough down the soil. It will significantly reduce the damage caused by root rot and increase the yield of vegetables by 15-20%.
4. In the early occurrence of wheat sheath blight, 30-40 kg of plant ash was used per acre. When the dew had not dried in the morning, Shun ridge was withdrawn at the base of the wheat plant, which had a certain effect on controlling disease spread.
5. For the fruit trees with root rot, first dig the roots of the roots, scrape the roots of the disease, dry them slightly, and then bury each plant with 2.5 to 5 kg of ash. After about 1-2 months, the diseased tree can issue new ones. root.
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