Curtobacterium flaccumfaciens pv. beticola: a new pathogen of sugar beet in China
A new bacterial leaf spot disease of sugar beet (Beta vulgaris) was first observed in 1995 in Neimenggu (Inner Mongolia), China. Affected plants initially show small, yellow leaf spots which became brown with a yellow halo. After 1 month, spots coalesced to form brown patches. Finally, the entire leaves desiccate and die. So far, the disease has only been observed in sugar beet fields near Linhe City. In severely affected fields, crop losses reached 100%. A bacterium was isolated from diseased leaves in 1995, 1996 and 1998. It was identified as a new pathovar of Curtobacterium flaccumfaciens and called Curtobacterium flaccumfaciens pv. beticola.
Chen YF, Yin YN, Zhang XM, Guo JH (2007) Curtobacterium flaccumfaciens pv. beticola, a new pathovar of pathogens in sugar beet. Plant Disease 91(6), 677-684.