马铃薯黑胫病又称黑脚病,因茎基部变黑的症状而得名,是危害马铃薯生产的一种重要病害,在东北、华北和西北等地区均有发生,一般发病率为2~5%,严重时达20~30%。近年来,南方和西南的马铃薯种植区也都有的趋势。发病原因:引发马铃薯黑胫病的病原为胡萝卜软腐欧文氏菌马铃薯黑胫亚种(图1),周生鞭毛的单细胞菌体呈短杆状,极少双连,具有荚膜,革兰氏染色阴性,能发酵葡萄糖产出气体,边缘齐呈整圆形 Potato black shank, also known as black foot disease, is named for its darkening of the base of the stem. It is an important disease that endangers the production of potatoes. It occurs in the northeast, north and northwestern regions, with a prevalence of 2 to 5 %, Severe up to 20 ~ 30%. In recent years, the potato growing areas in the south and southwest also have the tendency. The cause of the disease: The pathogen causing potato black shank is Erwinia carotovora subsp. Citrinopileatus (Fig. 1). The unicellular cells of the peridipan flagellum are short rod-shaped, rarely double-linked, with a capsule, leather Lan stain negative, can produce glucose fermentation gas, the edge Qi was a full circle