1匐茎翦股颖杂草 　　农户俗称鸡爪子草。目前已成为我国北方稻区较难防除的杂草。据在黑龙江省五常市杜家镇调查，这种杂草严重发生的地块， 0.5 hm2(公顷 )地在秋天捞出 3 t(吨 )。杂草在田间长达 1～ 2 m(米 )，粗的部分直径可达 2～ 3 cm(厘米，下同 )。水稻被这种杂草挤得 1 ranunculus ichthyosis weed peasant commonly known as chicken paw grass. It has become a weed that is more difficult to control in northern China. According to a survey conducted in Dujia Town, Wuchang City, Heilongjiang Province, a mass of 0.5 hm2 (hectare) of this weed was taken out in the autumn for 3 t (tonnes). Weeds in the field up to 1 ~ 2 m (meters), the rough part of the diameter up to 2 ~ 3 cm (cm, the same below). Rice is squeezed by this weed