紫茎泽兰(Chromolaena coelestina=Eupatorium coelestinum=E.stoechadasum)和飞机草(Chromolaena odorata=Eupatorium odoratum)是原产北美的两种害草,近二十年在我国云南省西南部、西部和中部大量蔓延,严重危害草场、农地、茶山、菜圃,给畜牧业、林业和农业带来巨大损害。我们1982年在云南进行野生牧草饲料作物品种资源考察时,对它们的植物学特征、生态习性、分布规律以及危害和防治做了一些调查研究。 Chromolaena coelestina = Eupatorium coelestinum = E.stoechadasum and Chromolaena odorata = Eupatorium odoratum are the two kinds of native grass in North America. In the recent two decades, Spread, seriously endanger the grassland, farmland, Dasan, vegetable garden, to livestock husbandry, forestry and agriculture have caused tremendous damage. When we investigated the resources of wild forage and forage crops in Yunnan Province in 1982, we did some research on their botanical characteristics, ecological habits, distribution rules, hazards and prevention.