According to the Chinese Pesticide Network , Schisandra chinensis is a genus of the genus Bacillus subtilis. The conidia are mostly cylindrical, with a few cylindrical, elliptical or long ovate shapes. In the Fengcheng area, the bacteria are closed in the capsule. In the winter, the cysticercosis and conidia were infested from May to June in the second year, and the period from July to August was the peak period. The temperature can be affected at 20 to 28 °C, and the most suitable is 25 to 26 °C. The altitude of the mountainous area above 1000 meters above sea level is heavy; the management is poor, the application of nitrogen fertilizer and the planting is too dense; the schisandra is 1 to 2 years old, and the incidence is more than 3 years.
Field symptoms of Schisandra powdery mildew:
Powdery mildew mainly harms the leaves of Schisandra chinensis, and in severe cases, the fruit, petiole and stem are also affected. At the beginning of the onset of the leaves, white fine powdery mildew spots appeared, gradually expanding the contiguous film, and the mildew layer thickened, like a layer of flour on the leaves. The back of the mildew is initially a chlorotic plaque that expands into irregular plaques as the disease progresses. In the late stage of the disease, black granules are produced in the mildew layer, causing the fruit to be stained and granulated, and the quality is reduced while the yield is reduced.
Prevention and treatment of Schisandra powdery mildew:
Fengcheng Schisandra mainly adopts the following control methods: 1 agricultural control, strengthen field management, balance fertilization, avoid excessive dense planting, strengthen ventilation and light, clear the field litter in autumn and winter, and concentrate on burning sick bodies. 2 pesticide control, evenly sprayed with 5% to 6,000 times solution of 12.5% ​​fruit emulsifiable concentrate, or evenly sprayed with 10% hypertonic ketone 1000 times liquid, evenly sprayed with 33% rust-free 800 times liquid, 30% ether bacteria The ester is evenly sprayed with water from 20 to 40 grams per acre.
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