How to Control Pests and Diseases with Chemical Fertilizer

The use of chemical fertilizers to control crop pests and diseases not only prevents phytotoxicity caused by improper use of pesticides, but also effectively promotes the growth of crops. It is a safe, economical and effective method. Now we will introduce several commonly used chemical fertilizers as follows:
1, commonly used nitrogen fertilizer ammonium bicarbonate, commonly known as gas fertilizer, has a strong insecticidal effect. 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%. When 25 kg of ammonium bicarbonate is used per acre for each 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 the cotton plant, which can kill aphids and leaves. Spraying effect.
2. Ammonia is a chemical alkaline fertilizer that kills insects and sterilizes them. When yellow wilt disease and blight occur in cotton, 40 kg of ammonia water is applied per acre, which can greatly reduce the disease. When cucumber is used as a basal fertilizer, ammonia can control cucumber disease. When planting Chinese cabbage, 35 kg of ammonia diluted 50 times is applied per acre to prevent cabbage virus disease. Ammonia also kills pests such as snails, cockroaches, and rice field grasshoppers.
3. Phosphatic fertilizer can kill insects and sterilize: spraying cotton with 2% superphosphate leaching solution can drive away the spawning cotton bollworm and kill cotton spider mites, cockroaches and other pests. Spraying tomatoes with 1% superphosphate calcium leaching solution also has a significant effect on preventing umbilical rot.
4. Silicon-calcium fertilizers can resist pests: When fertilizing crops, silicon and calcium fertilizers are used. After the crops are absorbed, silicon will accumulate in the epidermis cells of the crops, forming a very hard epidermis layer, making the pests hard to invade, thus enhancing The crop's resistance to pests. Practice has proved that: corn, sorghum, soybeans, beans and other acres of silicon and calcium fertilizer 30 kg-40 kg, to avoid the hazards of corn borer, soybean meal.
5, killing insects with grass ash:
With 10 kg of grass ash to water 50 kg, soaked for a day and night, and take the filtrate spray, can effectively control fruit trees, crops and flowers on the aphids, but also enhance potash fertilizer, enhance crop resistance and flowers and young fruit trees wind resistance.
In addition, tomato plants were sprayed with 500-fold potassium dihydrogen phosphate. It can prevent tomato mosaic virus. Spray cucumbers with a 0.2% boric acid solution to prevent cucumber downy mildew.

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