猪秧秧又名拉拉藤,茎细弱分枝,稍倾斜呈蔓状,四方形,稜上生细倒刺,摸有锯刺之感,故有“锯锯藤”之称。猪秧秧属茜草科,越年生草本植物,主要危害小麦、油菜。近几年来,随着化学除草剂的推广,麦田草相也发生了变化:鹅儿草发生量有所下降,猪秧秧却逐年上升,局部地区,已成为麦田重要的草害。据绵阳市中区永兴乡七星堆村六生产组(队)发生密度的调查,每平方米猪秧秧最多达到4,143株,一般为3,706株,最少的也有 Pig seedling also known as pull the rattan, stem thin branches, slightly tilted was a gentle, quadrilateral, ribs on the fine barb, touched a sense of sawing thorns, it is “saw Saweng,” said. Pig seedling is Rubiaceae, perennial herb, the main harm to wheat, rape. In recent years, along with the popularization of chemical herbicides, the grassland of wheat field also changed: the occurrence of goosegrass decreased, and the piggy seedling increased year by year. In some areas, it has become an important grass damage in wheat fields. According to the investigation of the density of six production units (teams) in Qixingdu Village, Yongxing Township, Central District, Mianyang City, a maximum of 4,143 strains of piglets transplanted per square meter, generally 3,706 strains, at least