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The best method of preventing and curing bean sprouts
The bean pods are important pests of cowpeas. The larvae harm the bean leaves, flowers and pods, especially after damaging the pods. The larvae enter the pods and feed the young seeds. The pods accumulate in the pods and outside the pods and the pods are bitter. , Unable to eat, serious damage to the area, the pupa rate of more than 70%, affecting the yield and quality, but also seriously affect its commercial nature. The bean worm body is small and the eggs are scattered on the buds and are hard to see with the naked eye. After hatching, the newly hatched larvae are often hidden in flowers and feed on them, resulting in falling flowers. The larvae continue to feed on the flowers. After the larvae are older (usually 2-3 years old), they climb out and are transferred to the pods. Once the larvae have entered the interior of the soybean meal, they will be treated with chemicals and the control effect will be greatly reduced. One of the main reasons is that it is difficult for agents to contact the worm body, and secondly, after the worm age is high, its resistance to the drug increases. Soybean sprouts generally take place in our district every year for 5-6 generations, beginning in June and ending at the end of October. The optimum environment temperature for the growth and development of leguminostesis is 25-29°C, relative humidity 85%-100%, and the duration of completing a generation within the peak period is only 18-25 days, so the generation overlap is very serious. After flowering and scabbing, it often occurs continuously and it is difficult to control. The farmers have not learned these characteristics of legumes. They are used to spraying pesticides on the legumes and leaves during control, neglecting the fall of flowers on the ground, and often begin to use drugs after seeing the damage of legumes. Proper control measures lead to poor control. Thus entering the vicious cycle of drug abuse and repeated repeated use of drugs, and even the use of some of the high-toxic pesticides should not be used, the problem of excessive pesticide residue problems, giving food security has brought great hidden dangers. In fact, as long as we understand the characteristics and habits of bean pods, and correctly grasp the prevention and treatment techniques, bean pods can be safely controlled. According to the author's practice and research in recent years, the prevention and treatment of bean pods should be based on the following principles: First, to master the principle of treating flowers and leaving untreated pods, to start the treatment of cowpea from the initial flowering stage and spray the liquid on the plants. And on the ground or leaves on the flower, so that all flowers can be evenly affected by medicine; second is to correctly grasp the time of application, bean curd control to be applied when the cowpea flowers bloom, that is 7 to 10 am, rather than the traditional In the evening or early morning, the third is to use safe, efficient, low-toxicity, low-residual pesticides. Generally, 5% Ruijinte Suspension 2000x, 20% Green Fortune Microemulsion 800x, 40% Xinnongbao Emulsion can be used. Pay attention to the safety interval of pesticides, Ruijinte for 3 days, Green Fortune and Xinnongbao for 7 days. Generally, once every 7-10 days, it can control the damage of the bean field.