See symptoms of scattered wheat smut. The pathogen Ustilago nuda (Jens.) Rostr. said bare black powder fungus, is a basidiomycotina subphylum fungi. The spores of the synonym U.tritici (Pers.) Rostr. were piled on the flower and destroyed all the spikelets, showing a white film. The insides were dark brown or black loose powder. Only the cobs and awns remained, and the awns became white and dry. The spores easily scattered after the membrane ruptured. The spores are brownish-brown and slightly lighter on one side. The surface is covered with fine thorns. The diameter of the spores is 5-9 μm. The main infestation of barley and wheat causes scattered head smut and parasitism is a special phenomenon. The bacteria on barley can infect wheat, but the pathogen on wheat cannot invade barley. See the spread of wheat and smut in the transmission route and onset conditions. Wogonin 98% Extract Powder,High Purity Wogonin,Pure Natural Wogonin Powder,Cas 632-85-9 Shaanxi The River Pharmaceutical Co., Ltd. , https://www.dahepharma.com
Control method with 2% Riken seed dressing agent (Bayer, Germany) 10g mixed barley seeds 10kg control effect of 97? 8%. Can also be used Barley Qing 3 20g, add a small amount of water into a paste, water 16kg, dip barley 12kg, temperature 20 °C dip for 30 hours, direct germination soaking after soaking, control efficiency of 90%.