Northward migration of Helicoverpa armigera (Lepidoptera: Noctuidae) and other moths in early summer observed with radar in northern China
Northward migration of Helicoverpa armigera (Lepidoptera: Noctuidae) and other moths in early summer observed with radar in northern China
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DOI：
10.1603/0022-0493-97.6.1874
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发表时间：
2004-12-01
影响因子：
2.2
通讯作者：
Guo, YY
中科院分区：
文献类型：
--
作者：
Feng, HQ;Wu, KM;Guo, YY
2001年和2002年在河北省廊坊用雷达观测了夏初棉蚜（Helicoverpa armigera, Hubner）等飞蛾的北迁。迁徙飞行通常发生在距地面1.2 km的高度，高密度层的浓度通常在距地面200-300 m的高度形成。当地种群成蛾黄昏起飞，日出前约0.5 h停止飞行，黄昏后约35 min面积密度达到峰值。平面图位置指示屏幕上强烈的哑铃回波模式，表明目标的集体方向，在2001年很明显，当时目标通常向东北移动，分层与逆温和最大风速有关。相比之下，在2002年，当目标向西北方向移动时，没有明显的哑铃模式。而根据目标和风速计算的朝向结果表明，2002年也出现了顺风共同朝向，且风向随风向而变化。2001年和2002年廊坊观测到的棉铃虫可能来源分别为河南省和山东省，目的区分别为辽宁和内蒙古。
The northward migration of Helicoverpa armigera (Hubner) and other moths in early summer was observed with radar in 2001 and 2002 at Langfang, Hebei province, China. Migratory flights typically Occurred at heights up to 1.2 km above ground level (AGL), and high density layer concentrations frequently formed at 200-300 m AGL. Adult moths of local populations took off at dusk and ceased flight approximate to0.5 h before sunrise with area density peaking approximate to35 min after dusk. A strong dumb-bell pattern of echoes on the plan position indicator screen, indicating collective orientation of the targets, was evident in 2001, when targets were typically moving toward the northeast and when layering was associated with a temperature inversion and maximum wind speed. By contrast, there was no notable dumb-bell pattern in 2002, when targets were moving toward the northwest. However, orientations calculated from target and wind velocities showed that downwind common orientation also was occurring in 2002 and that the direction varied with the wind direction. The probable sources of the H. armigera observed at Langfang were deduced to be Henan province in 2001 and Shandong province in 2002, and the destination regions were Liaoning and Inner Mongolia.