洞庭湖区豚草分布及危害的研究

Study on Distribution and Harm of Ambrosia artemisiifolia L.in Dongting Lake Area

[目的]为豚草的防治提供理论依据。[方法]2005年7月～2008年9月,对洞庭湖区(常德市、益阳市、岳阳市)豚草的发生、分布及危害情况进行了初步调查,并对每个调查点豚草的防治情况进行了研究。[结果]常德市、益阳市均未发现有豚草分布,岳阳调查区中岳阳楼地区、汩罗市汩营公路两旁豚草分布较多,并有继续扩散的趋势;洞庭南路路旁、岳阳楼公园和汩罗市汩营公路两旁豚草的平均覆盖度分别为95.3%、93.5%和85.4%,密度分别为36.6%、44.5%和48.3%,发生频率分别为53.1%、84.8%和43.0%,岳阳火车站豚草发生较少。[结论]整个洞庭湖区仅岳阳市有豚草分布。

[ Objective] The study was to provide the theoretical basis for control of Ambrosia artemisiifolia L. [ Method] From July of 2005 to September of 2008, the occurrence, distribution and harm condition of A. artemisiifolia in Dongting lake area （ Changde City, Yiyang City, Yueyang City） were preliminarily investigated, and its control situation in each investigation point was studied. [ Result ] There were no A. artemisiifolia in Changde City and Yiyang City, A. artemisiifolia distributed a lot in Yueyang building area and on both sides of Guying highway in Guluo City of Yueyang investigation area, and it showed expansion trend in that area. The average coverage of A. artemisiifolia on roadside of south Dongtingg road, in Yueyang building park and on both sides of Guying highway in Guluo City were 95.3% , 93.5% and 85.4% resp. , and its density were 36.6% , 44.5% and 48.3% resp. with occurrence frequency of 53.1%, 84.8% and 43.0% resp. A. artemisiifolia distributed less in Yueyang railway station. [ Conclusion ] A. artemisiifolia only distributed in Yueyang City in the whole Dongting lake area.