What is sorghum black onion mold root rot?

What is sorghum black onion mold root rot? Please introduce and guide the prevention and control methods Sorghum black onion mold root rot symptoms: seedling stage, adult plant stage can be disease. Wilting appeared at seedling stage, cortex and vascular bundle of diseased seedlings were brown and water-stained, fine roots softened and rotted. Infected leaves of adult plants droop slightly and curl, old leaves yellow and dry from leaf tips and margins. Root infected root, root cap brown rot. Pathogen: Sorghum black onion mold, is a semi-known fungi sub-door fungi. Conidia erect, 2 - 3 roots fasciculate or solitary, brown to dark brown, thick-walled, 150 - 300×6 - 8(um) in size, subapical rotation, apical cells expanded, above 3 sporogenous cells, apical cells can divide, each division once, forming a sporogenous cell, on which a string of conidia. Conidiospores are densely capitate, black, spherical, smooth or spiny, 12 - 27um in diameter. Transmission routes and disease conditions: the fungus is saprotic bacteria, can induce plant or root disease. Control methods: (1) implement rotation for more than 3 years. (2)Strengthen management, density appropriate, high ridge or high ridge cultivation, do not plant sorghum in low-lying land. (3)Apply fully decomposed organic fertilizer or compost made by Japanese enzyme bacteria, drain water in time after rain, and prohibit flood irrigation. Click for more sorghum cultivation technology Click for more grain cultivation technology