文献类型： 外文期刊

作者： Feng, HQ ¹ ; Wu, KM ² ; Ni, YX ² ; Cheng, DF ² ; Guo, YY ² ;

作者机构： 1.Chinese Acad Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100094, Peoples R China

2.Chinese Acad Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100094, Peoples R China; Henan Acad Agr Sci, Inst Plant Protect, Zhengzhou, Peoples R China

关键词： windborne transport;Helicoverpa armigera;flight behavior;radar observation

期刊名称：JOURNAL OF INSECT BEHAVIOR （ 影响因子：1.309； 五年影响因子：1.174 ）

ISSN： 0892-7553

年卷期： 2005 年 18 卷 3 期

页码：

收录情况： SCI

摘要： The high-altitude windborne transport of the second-generation moths of Helicoverpa armigera (Hubner) was observed with radar in July 2001 and 2002 at Langfang, Hebei province, China. Moths of local populations took off at dusk, with "area density" peaking ca. 0.5 h later. The variation of area density through the night suggested that the maximum flight duration was about 8.5 h. The moths generally ascended to altitudes of up to 1500 m above ground level (AGL) and formed layer concentrations at ca. 300, 500, and 1000 m AGL. Multiple layering was very common and layers were located at zones of maxima in wind speed or in wind shear rather than in temperature inversions. Both the displacement direction and the orientation of the insect were at an acute angle to the downwind direction, rather than being distributed at random, and varied as the wind direction changed. The windborne moths were mainly transported into northeastern China where maize at the silking stage would have provided good hosts for the subsequent (third) generation of H. armigera. These population movements may account for the nondevelopment of resistance to Bt cotton in H. armigera in northern China.