Method for prevention and control of licorice powdery mildew:
Glycyrrhiza is infected with powdery mildew, which produces yellow spots on the initial leaves, and then expands into round or oval lesions with white powdery mildew on the surface. The mildew spots are dispersed separately in the early stage, and then combined into a large mildew spot, which can even cover the whole leaves, seriously affecting photosynthesis, causing premature senescence of the plants, and greatly reducing the yield.
The control method of licorice powdery mildew: rotation, and crops with non-white powdery hosts are rotated for 2-3 years to reduce the source of powdery mildew in the field. Reasonable close planting, keeping the field transparent and translucent, reducing the proliferation of bacteria. After the rain, the field water is discharged in time, the new high-fat film is sprayed to protect the licorice, and the infection of the bacteria is isolated, and the ability to resist natural disasters and the intensity of photosynthesis are improved. Strengthen the inspection, find the infected branches and leaves, promptly remove and remove the fallen leaves and sick plants in the field, bring out the concentrated destruction outside the field, spray disinfectant and protect the tree generals in the whole garden to reduce the source of pathogens in the field. In the early stage of the disease, timely spraying targeted drug control, according to the situation of licorice disease, spray 2-3 times as appropriate, to effectively prevent and control powdery mildew, protect licorice high yield and high yield.
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