Green beans and sprouts in peas are very popular among consumers. However, in the production process, quality and yield are often affected by some physiological obstacles and pathogen invasion. For example, bud blight is also called wet rot or carrion disease. There are two kinds of symptoms. The first is that at the tip of the tender stem 2~6 cm, there is watery pathological disease. When the climate is dry, the decayed part quickly shrinks. Hanging on the top of the stem, when the rain or air humidity is resurgence, the diseased part will show signs of wet rot; the second is the young pod, the pod is surrounded by a grayish white hairy mold layer with black granule cysts and Sporangia, the late pods are yellow, and the disease pods extend from the pedicle to the pod handle. When the humidity is high, many susceptible pods have gray-white fur and half-yellow peas.
The causes of the disease are: low temperature, low light, high humidity induced diseases; second, residual mycelium in the soil or the production of spores to provide pathogens over the winter; third, pea plants have wounds that can be invaded by germs; fourth, wind and rain can be Accelerate the spread of germs; fifth, insects help spread diseases.
Prevention techniques can be started from agricultural control and chemical control.
In terms of agricultural measures, the first is that the peas should be heavy, and the rotation should be carried out, preferably the water and drought rotation; the second is the field with higher fertility, the density should be appropriately reduced to prevent the shade; the third is to refine the trench, in time Drainage; Fourth, when drought is severe, prevent flooding. Pay attention to the "dry flower wet board", that is, keep the ventilation and light transmission when blooming, reduce the humidity, and be sufficient when podding, keep moist management.
In terms of chemical control, first, in the early stage of the disease, spraying 64% of the anti-drug WP WP 400-500 times; the second is 75% chlorothalonil WP 600 times; the third is 58% metalaxyl Mn-Zn Wet powder 500 times liquid; Fourth, 70% ethyl phosphorus · manganese zinc wettable powder 500 times liquid; Fifth, when it is resistant to certain fungicides, 69% Anke manganese zinc 1000 times liquid can be used.
More pesticide knowledge , please pay attention to China Pesticide Network
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