Bipolaris cactivora causing fruit rot of dragon fruit imported from Vietnam

摘要

In 2009, a new disease of imported dragon fruit (Hylocereus undatus) was discovered in a fruit market in Kunming, Yunnan Province of China. The symptoms included water-soaked, olive to black powdery spots to coalescing soft rot in the later stage. The pathogen of this disease was identified as Bipolaris cactivora and its pathogenicity was confirmed by satisfying Koch's postulates. This is the first report of B. cactivora causing fruit rot of dragon fruit imported from Vietnam. The need for vigilant quarantine measures is discussed.