京冀地区烟粉虱的早春扩散特征
iffusion of Bemisia tabaci in early spring in Beijing and Hebei regions
崔洪莹 戈 峰**
点击：2077次 下载：2次
DOI：
作者单位：中国科学院动物研究所 农业虫害鼠害综合治理研究国家重点实验室 北京 100101
中文关键词： 烟粉虱，种群动态，早春扩散
英文关键词： Bemisia tabaci， population dynamics，diffusion of early spring
中文摘要：
掌握烟粉虱Bemisia tabaci (Gennadius)温室内种群动态过程和早春扩散规律，是从源头治理大田烟粉虱的关键。通过对京冀地区烟粉虱冬季温室（番茄）种群动态调查发现，烟粉虱在温室的发生呈现先逐渐下降后又上升的趋势。进一步对早春扩散的调查表明，其大棚内的寄主植物为番茄、甜瓜、黄瓜、豆角、冬瓜，5月中上旬为华北烟粉虱从大棚向外扩散高峰期，以在大棚周围（0 m）处的数量最多，且随着距温室虫源距离的增加，虫口密度逐渐减小，烟粉虱从虫源大棚逐渐向外扩散。根据其种群动态和扩散规律，建议在5月中上旬重点在大棚周围控制烟粉虱，以防止其对外扩散。
英文摘要： In order to minimize crop damage it is important to control Bemisia tabaci(Gennadius) before its dispersal from greenhouses in early spring. The spring abundance and dispersal of B. tabaci from greenhouse tomato crops in the Beijing and Hebei regions was studied using systematic surveys and inspection. Numbers of this insect in greenhouses first decreased gradually then increased. The results show that the hosts of B. tabaci in greenhouses are tomatoes, melons, cucumbers, beans and wax gourds, and that the peak of dispersal from greenhouses to fields occurred in early and mid-May. The highest numbers of individuals were observed within one meter of greenhouses and density in fields was negatively correlated with the distance to the nearest greenhouse. Therefore, we suggest that the best way to prevent the dispersion of B. tabaci to fields is to control this pest intensively near greenhouses in early and mid-May.