The main role of chemical fertilizers is to provide plants with the necessary elements for growth. Besides, do you know that fertilizers have other effects? In fact, some fertilizers can not only promote the growth of crops, but also act as pesticides . Eliminate pests and diseases, not only efficient, but also safe without any side effects. Let's follow the Xiaobian together.
First, phosphate fertilizer
The oxalic acid secreted by the glandular hairs on the cotton tender head has an attractive effect on the cotton bollworm moth.
Application method:
1. In the occurrence period of adult cotton bollworm, 1% to 2% calcium perphosphate leaching solution is used for foliar spray fertilizer, which can change oxalic acid into calcium oxalate and lose the attracting power to cotton bollworm, thereby reducing the egg drop of cotton field by 33.3%~ 73.4%. The duration of each spraying of phosphorus is generally 2 to 3 days.
2. Tomato umbilical rot is a physiological disease caused by calcium deficiency in plants. It is sprayed with 1% calcium perphosphate from the beginning of tomato, sprayed once every half month, and even sprayed 2 or 3 times, which can obviously prevent umbilical rot. occur.
Second, nitrogen fertilizer
Ammonium-nitrogen fertilizers such as ammonium bicarbonate and ammonia have strong volatility, and have certain stimulating, corrosive and fumigation effects on pests, especially for small spiders, aphids, thrips and other small insects with weak endurance.
Application method: Spray evenly with 1% ammonium hydrogencarbonate or 0.5% ammonia aqueous solution, spray once every 5 to 7 days, and spray 2 to 3 times.
Third, urea
Urea has the effect of destroying chitin of insects.
Application method
The "Urine Mixing Agent" prepared by mixing urea, washing powder and water in a ratio of 4:1:400 has good control effects on various pests such as aphids, cabbage caterpillars and red spiders which are harmful to cotton, vegetables and flowers. When wheat rust occurs sporadically, spraying with 50% urea or 3% ammonium sulfate solution works well.
Fourth, zinc fertilizer
After the sweet pepper is planted and slowed down, and sprayed with 0.05%-0.1% zinc sulphate solution in the result period, the occurrence of viral diseases can be reduced, and the fruit setting rate and single fruit weight can be obviously increased, and the yield is increased by 15% to 37%.
Five, manganese fertilizer
When the Chinese cabbage is planted, it is sprayed with trace element manganese, or sprayed once with 0.1% to 0.2% manganese sulfate solution in the seedling stage, rosette stage and core period of Chinese cabbage, which has significant control effect on Chinese cabbage heartburn. Increased yield by 10% to 18%, and improved the quality of Chinese cabbage.
Sixth, potash
Potassium can enhance the stress resistance of crops, and the application of potassium fertilizer can inhibit the occurrence of various crop diseases and insect pests. The potash fertilizer that is directly used to control crop diseases and insect pests in production is grass ash.
Application method:
1. Using 10 kg of grass ash and 50 kg of water, soaking for 24 hours and filtering the filtrate to effectively kill the mites on the crop.
2. In the cotton seedling stage, 20 to 25 kilograms of grass ash per mu is applied to the ridge, which can increase the ground temperature and reduce the occurrence of cotton blight, anthracnose and red rot.
3, before planting onion, garlic or leeks ditch, apply 20 kg of grass ash per mu to the bottom of the ditch or 15 kg of grass ash per acre in the seedling stage of onion, garlic, leeks and other vegetables, and then pad the soil to make the root The damage is significantly reduced, and the vegetable yield is increased by 15% to 20%.
4. When the wheat sheath blight occurs at the beginning, 30-40 kg of grass ash per acre is used. When the dew is not dry in the morning, the ridge is sprinkled on the base of the wheat plant, which has certain effect on controlling the spread of the disease.
5. For fruit trees with root rot, first dig the root soil, scrape off the root bark of the disease, dry it slightly and then embed 2.5 to 5 kilograms of plant ash per plant. After 1 to 2 months, the diseased tree can emit new roots.
Seven, silicon calcium fertilizer
Most of the silicon is accumulated in the epidermal cells of the crop after applying the silicon-calcium fertilizer to form a very hard epidermal layer, thereby enhancing its ability to resist pathogens and pests.
Application method:
1. Applying 30-40 kg of silicon-calcium fertilizer per acre of corn, soybean and other crops can significantly reduce the damage of corn borer and bean pod.
2. Applying silicon-calcium fertilizer to rice can increase the degree of silicification of epidermal cells, so the ability to resist pests and diseases is obviously enhanced, the grain weight is increased, the yield is increased by 10% to 50%, the incidence of rice blast is reduced by 0.3% to 19%, and the incidence index is decreased. 0.5% to 13.9%.
The above is a fertilizer with “pesticide efficacyâ€, which is highly efficient and pollution-free. You may wish to try it too. If you want to know more about pesticides, please pay attention to the pesticide network.
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