Seasonal Migration of Helicoverpa armigera (Lepidoptera: Noctuidae) Over the Bohai Sea
Seasonal Migration of Helicoverpa armigera (Lepidoptera: Noctuidae) Over the Bohai Sea
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DOI：
10.1603/029.102.0114
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发表时间：
2009-02-01
影响因子：
2.2
通讯作者：
Wu, Kongming
中科院分区：
文献类型：
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作者：
Feng, Hongqiang;Wu, Xianfu;Wu, Kongming
采用探照灯诱蚊器和昆虫学雷达，在渤海中心的一个小岛上，通过环渤海地区的诱蚊灯网，观察了渤海上空棉铃虫（Helicoverpa armigera, Hubner）（鳞翅目：夜蛾科）的季节性迁徙。据观察，阿尼格氏夜蛾至少早在5月就会在海上迁徙，通过一个网络捕捉光线表明，迁徙可能早在4月就开始了，当时这些蛾子刚从越冬的蛹中出来。在春夏两季，棉蚜蛾乘南风向北迁徙，在夜间乘北风或在有北风的地方返回南方。天气锋面（冷锋或暖锋）或低压槽在大约1700时通过，会引起阿米巴在海面上的迁徙。棉铃虫一般在海拔1500 m以下的高度飞行，在200 ~ 500 m A的层浓度范围内，风向、风速和温度最适宜。在秋季迁徙过程中，棉蚜倾向于向西南方向移动，当顺风方向为225度时，棉蚜可以顺时针旋转来补偿风的漂移。雷达测得的位移速度为24 ~ 41 km/h，飞行时间为8 ~ 11 h，最大迁移速率为1894个月/ km/h。
The seasonal migration of the Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae) over the Bohai Sea was observed with a searchlight trap and an entomological radar located on a small island in the center of the sea, and through a network of light-traps around the Bohai region. The H. arrnigera moths were observed to migrate over the sea at least as early as May and light trapping through a network suggested migration might start as early as April, as soon as the moths had emerged from overwintering pupae. H. armigera moths migrated toward the north in southerly winds during spring and summer, and returned south on nights with northerly winds, or at altitudes where the wind was northerly, during frill. The passage of a weather front (cold or warm) or trough at approximate to 1700 hours provokes migration of H. armigera over the sea. The H. armigera generally flew at altitudes of below 1,500 m above sea level (asl) with layer concentrations at 200-500 m A, where the wind direction, wind speed, and temperature were optimum. During fall migration, H. armigera tended to orient toward the southwest and was able to compensate for the wind drift by turning clockwise when the downwind direction was 225 degrees. The displacement speed measured with the radar was 24-41 km/h, the duration of flight was 8-11 h and the maximum migration rate was 1,894 moths per km per h.