When it comes to insects, the farmers are deeply abhorred by it. Everyone is caught in such awkward situation. If you don’t fight pesticides, the crops are seriously harmed by insects. If you fight pesticides, you will fight drugs for years to make the insects resistant. The big problem can not be cured, and even the pesticide residues in the crops are harmful to the health of the human body. In fact, the fertilizer we use has a good insecticidal effect, not only pollution-free, but also can add nutrients to the crop, which is very practical. Today, Hui Nongwang Xiaobian said how to use several common fertilizers to kill insects. It is estimated that many farmers' friends know that the mixture of urea + washing powder + water is sprayed as a foliar spray according to a certain proportion (usually urea, washing powder, water according to 4:1:400), and nitrogen is added to the crop. On the basis, it can effectively kill pests such as aphids, cabbage caterpillars and red spider beads. The main principle is that urea can destroy the insect protective layer material chitin and achieve the purpose of killing. Adding washing powder is to improve the adhesion of the solution. effect. Smaller insects such as locusts, thrips, and red spiders have very poor tolerance to some irritating, corrosive ammonium bicarbonate and ammonia. Use these two nitrogen fertilizer solutions (with 1% ammonium bicarbonate or 0.5%). Ammonia water can be killed. Most of the pests and diseases are caused by the imbalance of the crop's own nutrition. According to the study, among the 740 fungal diseases and 68 bacterial diseases, potassium can reduce the damage by 71% and 75%, respectively, in 230 pests (螨). Potassium can effectively reduce the harm by 59%. Taking the most common plant ash in rural areas as an example, after 10 kg of grass ash and 50 kg of water are immersed for 24 hours, the clarified liquid spray can effectively kill the mites on the crop. For crops with severe damage to underground pests such as green onions and leeks, 20 kg of wood ash per acre of ditch before ditching can greatly reduce the damage of root mites and increase the yield of vegetables by 15% to 20%. For some bacterial diseases, the rational use of NPK and medium and trace element fertilizers can effectively improve the disease resistance and resilience of crops, and reduce the use of pesticides and increase production. YT-68 YT-68 Shenzhen Sunshine Technology Co.,Ltd , https://www.shenzhenyatwin.com
