紫茎泽兰又名飞机草是一种毒害常绿杂草,属菊科泽兰属多年生。凉山地区从低海拔的金沙江沿线直到海拔2800多米的高山地区均不同程度生长有这种毒草。它种籽小而轻,如蒲公英种籽一样,随风传播,飞到哪里,就在哪里生根繁殖,当年就形成丛生状,高可超过一米,占地面积超过0.2平方米。与农作物、牧草、果木争地、争水、争肥、 Eupatorium adenophorum also known as aircraft grass is a poisonous evergreen weeds, is a genus Compositae perennial. Liangshan area from low altitude along the Jinsha River until the altitude of more than 2800 meters of alpine areas are grown to varying degrees with this poisonous grass. It is small and light seeds, like dandelion seeds, spread with the wind, wherever fly, where the root breeding, the formation of clustered year, high can be more than one meter, covers an area of ​​more than 0.2 square meters. And crops, pastures, fruit trees fight for water, fight for fertilizer,