Symptoms of the disease are mainly infested with leaves and sheaths, as well as stems and panicles. A round, brown-colored bulge (scrubs) was scattered in the affected area. When the barley matures, it produces a smaller black, nearly rectangular teliospore, buried in the epidermis. Pathogen Puccinia hordei Otth. Called barley rust, a basidiomycotina fungus. The size of summer spores is 0.3-0.50.1-0.2 (mm). The summer spore unit cells are nearly spherical and pale yellow with a size of 20-3017-22 (μm) with small thorns on the surface and 5-10 buds scattered. The teliospore cells and occasional twins have different shapes, smooth surfaces, slightly thicker tips and handles. Transmission routes and disease conditions The bacteria belong to the main host rust. The summer spores and teliospores are produced on barley. Foreign sporozoites and rust spores have been reported in the evergreen young eye of Liliaceae. In our country, the spores of winter wheat grow on winter barley in winter, and the summer spores spread northward with the monsoon. After the summer in the north, it spreads to the winter barley in winter in the winter. Summer spores Germination temperature 11-17 °C, rarely germinate more than 23 °C. Control methods (1) Selection of rust resistant varieties. Such as Shen Mai 1. (2) Chemical control See wheat leaf rust. Fresh Garlic,Natural Garlic,Premium Garlic,Organic Garlic Yirun Agricultural Cooperative , https://www.yiruncn.com