豚草属菊科一年生草本植物。原产美国西南部和墨西哥北部的索诺兰沙漠地区,约在20世纪30年代初传入我国沿海,经过一个较长时期的适应期,近10年正以异常态势迅速蔓延,向农田、果园、城镇、绿化带、公路沿线入侵,表现出顽强的生命力和竞争 Ragweed Compositae annual herb. Originally produced in the south of the United States and the Sonoran Desert in northern Mexico, it was introduced into the coastal areas of China about the early 1930s. After a relatively long period of adaptation, the past 10 years were rapidly spreading in anomalous situations. , Cities and towns, green belts and invaders along highways, showing strong vitality and competition