It is imperative to prevent and cure Dutch bean powder

The main disease of the Dutch bean is powdery mildew. Powdery mildew usually has more incidences in the harvest of peas in March-April, and the losses are more serious. So what is powdery mildew? Xiaobian gives you a general explanation. The initial stage of powdery mildew of peas is only a pale yellow point, and then a white powdery object is produced around the disease. The damaged leaves will quickly become yellow and yellow until they fall off. Therefore, the harm of powdery mildew is relatively large. Be sure to stop it in time. Next, Xiaobian will summarize the methods for controlling Dutch bean powdery mildew.

Dutch bean powder mildew prevention and treatment methods:

First, the agricultural control of the prevention and control methods of Dutch bean powdery mildew:

1. The planting area should be selected. Dutch beans began to be planted in late July, and in late November, Dutch beans entered the peak of pod harvesting, during which the incidence of powdery mildew was relatively low. If you are planting in a mountain village, you must avoid the time when the peas are exposed to frost. Therefore, the planting period of the peas should be selected in late December, but remember that in the following year, the doubling period of the peas must pay attention to powdery mildew, especially drought. The incidence of powdery mildew can reach 100%.

2. The variety of Dutch beans should be selected. The variety of Dutch beans must choose a good breed that is better against viruses and rigorously rotate. If the Dutch bean is used continuously, the incidence of powdery mildew is relatively high. If conditions permit, try not to make continuous crops.

3. The wreckage of the diseased plants in the field must be removed in time to prevent infection or harm, because during the period from February to March, the peas in the dam area will be piled up in the field and will cause a large number of pathogens. The incidence of peas.

4. The cultivation method of peas should be proper, and the water and fertilizer should be reasonable. The low-lying ground should be cultivated in high-deep deep ditch, do the work of ginger damp, etc., and set up the shelf in time to prevent the lodging of Dutch bean plants. There must be drip irrigation facilities in the mountainous area. It is forbidden to water the large water, and the application amount of nitrogen fertilizer should be controlled during the planting process. , reasonable supplementation of trace elements such as boron and amino acids.

Second, the chemical control of the prevention and control methods of Dutch bean powdery mildew:

In the early stage of the Dutch bean powdery mildew, spray with the spray of hydantoin, chlorothalonil, polymycin, difenoconazole, flusilazole, guanidine, and carbendazim, etc., every 10 days. Continuous control 2-3 times, can be effectively eliminated. It is necessary to do a safe interval during the picking period.