黑胫病是马铃薯一种很严重的病害,能所侵染植株的茎、根和块茎,而且在植株的整个生育期间,黑胫病都能在植株的茎上发病。马铃薯出苗后不久就开始发病,到开花期达到发病高峰。发病较晚时,病害流行较弱,仅个别茎染病,而在整个植株体内继续发展,但到生育期的后半段,块茎亦感病。黑胫病多数从薯脐开始感染,在薯脐处形成一个腐烂小坑。 Black shank is a very serious disease of potato that can infect the stems, roots and tubers of the plants, and the black shank disease can occur on the stems of the plants throughout the growth of the plant. The potato began to emerge shortly after emergence and peaked at its flowering stage. Late onset, the disease epidemic is weak, only some stem disease, and continue to develop throughout the body, but to the second half of the growth period, tubers are also susceptible. Most of the black shank is infected from the umbilical cord and forms a decay pits at the umbilical cord.