How to prevent four kinds of diseases of beans

1. Retting root legumes like wet, drought and waterlogging tolerance, so on the basis of ridge cultivation, we should irrigate small water to avoid stagnant water in the field, resulting in root system can not breathe, resulting in plant death.

Prevention and control measures: flood irrigation should be avoided, if there is heavy rain, it should be drained in time, and appropriate hoeing can be done if conditions are available after sunny days. In order to increase soil permeability and improve root activity.

two。 The blight is mainly harmful to the stem vine, and sometimes the leaves and pods are also damaged, which constricts at the base of the stem, causing the upper part to wilt and die. The disease produces white mycelium when the humidity is high, and it is easy to occur when the ventilation is poor and the soil moisture is high.

Control measures: it can be sprayed with 72% DuPont Klou 500x or 72.2% Plc 800x, or with 69% Anke manganese zinc 1000 times. Once every 10 days, sprayed 2 times in a row.

3. Most of the Fusarium wilt pathogens were invaded by capillary roots, and the leaves of diseased plants turned yellow from bottom to top and were easy to fall off. Cracks sometimes occur in the rhizome. Finally, the plant wilted and withered. When the disease is cut open, it can be seen that the vascular bundles turn brown and the severe outside also turn brown. When the humidity is high, it will produce a pink mildew layer. The disease is mostly caused by continuous cropping or high humidity in the shed.

Prevention and control measures: the most effective method is to irrigate the root with 50% DT500 times mixed with 20% methyl parathion 1000 times before or at the initial stage of the disease, once every 7 to 10 days, 2 or 3 times in a row, and must be prevented and treated early.

4. The leaves of the diseased plants turned yellow and withered from top to bottom. The leaves are yellow and withered from the leaf edge, not easy to fall off, the diseased plants are easy to pull out, the stem base and roots are dark brown, the lateral roots fall off, the main roots rot, and finally the diseased plants die. Flat planting, too much watering, lack of fertility, extensive management of continuous cropping land serious disease.

Prevention and control measures: spray or irrigate 1500 times of carbendazim or root rot in the initial stage of the disease, and irrigate roots with Fengshou No. 1 800-1000 times, once every 10 days for 2 times in a row.