Radish downy mildew develops from the base to the upper leaves. At the beginning of the disease, light yellowish near-circular to polygonal lesions form on the leaf surface, and when the air is wet, a frosty mildew layer is formed on the leaf's back, sometimes spreading to the foliage. The late lesions were dead and brown, and all the dead yellow leaves died. Main prevention measures: 1. Select disease-resistant varieties: choose disease-resistant varieties according to local conditions. 2. Rotation: Two-year rotation of seriously ill and non-cruciferous vegetables. 3. Cultivation Management: Promote deep sorghum sorghum, density appropriate, timely clean up the ditch to maintain drainage and irrigation, apply enough organic fertilizer, appropriate application of phosphorus and potassium fertilizer, and promote plant growth robust. 4. Seed treatment: Seed dressing with 0.3% seed weight of 40% EB aluminum wettable powder or 75% chlorothalonil wettable powder. 5. Chemical control: In the early stage of disease, control once every 7-10 days, 3-4 times in a row; Medium to moderate occurrence year, control once every 5-7 days, 4-6 times in succession, optional 25% metalaxyl WP wettable powder 600-800 times, or 65% zeocin WP wettable powder 600-800 times, or 40% EB aluminum wettable powder 400 times liquid spray control. During the prevention and treatment, attention should be paid to reasonable and alternate use, and the last spraying and harvesting should be conducted strictly in accordance with the relevant national safety intervals for pesticides. Foot and leg massager Foot and leg massager Shenzhen Jie Zhong Lian Investment Co., Ltd. , https://www.szmeizons.com