百草枯[又名克芜踪(Gramoxone)、泊拉夸特(Paraguat)],其化学有效成份为,1,1′——二甲基——4,4′——联吡啶阳离子盐,结构式(CH_3—N(?)—]_2~(++),是触杀型灭生性除草剂,对多种杂草有极强的抑制力,可直接杀灭一年生阔叶杂草,并可损害多年生杂草的绿色部分,抑制其生长。我们用此药在苹果园中,从杂草萌发至秋后分期分区进行间歇性试验,对21个科所属45种杂草(表1)叶面喷洒, Paraquat [also known as Gramoxone, Paraguat] has the chemically active ingredient 1,1’-dimethyl-4,4’-bipyridinium cation salt, (CH_3-N (?) -] _2 ~ (++), is a contact kill biocidal herbicides, a variety of weeds have a strong inhibitory force, can directly kill annual broadleaf weeds, and can damage perennial Weeds in the green part of the inhibition of its growth.We use this drug in the apple orchard, from weed germination to autumn after the staged partition intermittent test of 45 families belonging to 21 families (Table 1) foliar spray,