紫茎泽兰在我国的分布、危害与防除途径的探讨

紫茎泽兰于解放前后由缅、越方向传入我国云南南部,目前向北已蔓延到25°33′N地区,向东扩展到广西、贵州境内。其中在早期侵入的滇南地区,早已发展成连片的单优群落,侵占农地,危害牲畜,影响林木生长,广大群众反映十分强烈。 文章提出要消除紫茎泽兰的这种危害,首先应采取严禁毁林开荒,固定耕地,森林采伐迹地要及时更新等预防措施。同时尽快引进泽兰天敌,开展以恢复种群生态平衡为基础的生物防除。应用2、4-D、2、4、5-T百草枯等行之有效的化学防除方法也是十分必要的。至于诸如人工拔除等机械措施,据国内外试验证明一般是无效的。 文章最后着重分析了紫茎泽兰在我国这样的新发展医域,其潜在危害十分广泛,应引起注意。

STUDIES ON THE DISTRIBUTION, HARMFULNESS AND CONTROL OF EUPATORIUM ADENOPHORUM SPRENG

Eupatorium adenophorum Spreng invaded the south of Yunnan Province from Burma and Vietnam during the end of 1940s. Up to now,its range has spreaded northwards to 23?0'N and eastwards to Guangxi and Guizhou Provinces. In the south part of Yunnan E,adenophorum invaded early,its population has expanded and become a monospecies dominated community which invaded farmlands,harmed grasslands and did some impacts on the growth of tress, and as such get a very bad reputation.In this paper,it is suggested that,to eli...