Albucidin was a novel oxetane nucleoside phytotoxin,isolated from the fermentation broth of Streptomyces albus subsp.chlorinus NRRL B-24108 in 2009.This natural product showed high potency and broad spectrum herbicidal activity following post-emergence applications as well as moderate levels of pre-emergence activity.Notably,this was the first report of herbicidal activity for this type of compounds,and preliminary data suggested that the mode of action may be new.