Sorghum bacterial streak disease

Symptoms mainly harm sorghum blades and leaf sheaths. The lesions form light red to light mauve strips along the veins and are about 1 to 3 mm wide. A few species are yellowish-brown, and the lesions are shiny and not flooded, unlike bacterial red strip disease. The lesions form large red spots for a long time, and the diseased leaves turn red and dry. China's Hebei, Shanxi, Shandong, Henan, Jiangsu and other provinces generally occur.

Pathogen Pseudomonas andropogonis (EFSmith) Stapp. Pseudomonas seuculata, bacteria. Rod-shaped, size 1 - 20.5 - 0.7 (um), 1 or rarely 2 polar flagellum, often 1 sheathed flagellum, no fluorescent pigment, no pellicle, no spore, leather Blue stained negative, aerobic. On the gravy Chen agar plane, the colony is round, white, slightly shiny, neat, smooth, translucent, slightly bulging. The optimum growth temperature is 5-38°C, the optimum temperature is 22-28°C, and the lethal temperature is 50°C. In addition to damaging sorghum, it can also infect corn and other grasses.

Transmission routes and conditions, control methods, see corn bacterial streak disease.

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