Onion pathological dry tips have "green stem" and "white dry" points. "Qinggan" is due to the damage caused by gray mold. The disease is heavy at night when the temperature is low and the humidity is high. At the initial stage of the disease, there were white spots on the leaves, nearly round or elliptical, with a diameter of 1 to 3 mm. They developed from the tips of the leaves and gradually became flaky, causing the onion leaves to curl and die. Anti-pharmaceutical agents may use prohexine, saoxin, nicotinamide, etc., and silicone additives may be added during spraying to increase control efficiency. "White dry" is caused by the disease, and it is prone to occur under high temperature and high humidity conditions. The incidence of heavy rainfall in the case of cloudy days is also the most important cause of the current development of green onions. In the initial stage of the disease, the lesions were dark green, immersed in water, and after the enlargement, they were grayish-white lesions with indistinct edges and withered leaves. When the disease is severe, the field is white. Polic and metalaxyl manganese zinc can be used as control agents. However, it should be noted that there is a layer of wax on the surface of the onion leaves, and silicone additives must be added when spraying to increase the adhesion of the chemicals. Medical Surgical Masks Disposable medical masks are three-layered regular authentic children and individually packaged for adults. Only if there is no peculiar smell, it is a real mask. Upgraded, widened and thick ear straps, after authoritative testing, can bear weight, high elasticity, no ears, no break, and comfortable to wear. High-elastic ear straps, comfortable and non-straining ears, the surface is evenly densely covered with pores, comfortable and breathable, low sensitivity and no irritation. There is no burr, and it is our responsibility to check health. China Protective Mask,Disposable Mask supplier & manufacturer, offer low price, high quality Disposable Medical Dust Mask,Medical Disposable Face Mask, etc. Protective Mask,Disposable Mask,Disposable Medical Dust Mask,Medical Disposable Face Mask KUTA TECHNOLOGY INDUSTRY CO.,LIMITED , https://www.kutasureblue.com