Dingmin Pharmaceutical supply Ribociclib API and Ribociclib Intermediates with high purity and best price. The main products CAS No are as follows: 1211443-61-6, 733039-20-8, 1374639-76-5, 1374639-77-6, 1211443-58-1. Sample can be sent if you request. 2-Chloro-7-Cyclopentyl,Ribociclib Intermediates,Cas 1374639-76-5 Shijiazhuang Dingmin pharmaceutical Sciences Co.,Ltd , https://www.dingminpharma.com
First, onion purple spot. In the hot and humid conditions easy to disease, lesions occur in the leaves, spindle-shaped, slightly depressed, concentric ring pattern, purple and covered with mold. The affected area becomes soft and easy to fold, and the severe leaves die. Use 40% carbendazim gel suspension 400 times, or 50% dexamethasone, spray once every 7-8 days, spray 2-3 times.
Second, onion rust. Rainy weather is prone to onset. The lesions are mostly on the onion leaves, are rhombic or elliptical, slightly convex and orange-colored. After the rupture, the pathogenic spores of red powder are scattered and transmitted through wind and rain, resulting in reinfection. For prevention and treatment, use 20% Triadimelin 2000 Beilu, or dirute sodium 300 times spray, spray generally 5-7 days, even spray 2-3 times. It must be noted that it must be started at the beginning of the disease, otherwise the effect will be poor.
Third, onion downy mildew. It is easy to happen under cool and wet conditions. The diseased department was pale or light yellow, and most of them were susceptible to the weak old leaves of the weak or healthy plants. They gradually spread upwards, and only 1-2 newly-picked young leaves remained. When used for prevention and control, use 90% EB aluminum wettable powder 400 times liquid, or Rhizoctonia mildew wettable powder 1500 times liquid, usually spray once every 6-7 days, even spray 2-3 times to control the disease development.
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Onion disease prevention and control
Purple onions are prone to purple spot, rust, and downy mildew during the autumn. In the early stage of disease, timely chemical control can effectively control the spread of disease, increase production and quality.