Controlling Techniques of Broad Leaf Spot of Vicia faba

Broad bean spot disease is a fungal disease, and it occurs more severely in low-drainage or low-potassium fields. In case of rainy days, the humidity is high and it develops rapidly. There are also lesions mainly on the leaves, stems, flowers, and larvae. The victim's leaf began to appear with large, red, small spots on the needles. The backs of the leaves were larger, gradually expanding into round or oval shapes with slight depressions in the middle. The color was light, the edges were purplish red, the micro uplifts, and there was a clear junction with the Ministry of Health. Under the conditions, there were gray molds on the lesions. When the disease is serious, the diseased plants, including flowers, turn black and the leaves fall, and finally the whole plant withers.
Control methods
1, mainly pay attention to reasonable close planting, open field drainage irrigation ditch, increase potash fertilizer.
2, chemical control, can be used 1% of the Bordeaux mixture sprayed 3 times, each time interval of 7 days; or with anti-drug glycosides, fast-king, metalaxyl manganese zinc, etc. 3 kinds of agents, any one, with 1:800 times The liquid is evenly sprayed, re-sprayed every 15 days, and continuously sprayed 3 to 5 times, which can greatly reduce the disease.

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