Feng H-Q, Wu K-M, Ni Y-X, Cheng D-F, Guo Y-Y
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, People's Republic of China.
Bull Entomol Res. 2005 Aug;95(4):361-70. doi: 10.1079/ber2005367.
The autumn migration of Helicoverpa armigera (Hübner) was observed with radar and two types of light-trap at Langfang, Hebei province, China in 2001 and 2002. The sudden increase in the proportion of H. armigera moths in the searchlight trap indicated migration into the area and catches increased 10-fold during the second half of the night due to the landing of migrants before dawn. The moths' migratory flights took place at up to 2000 m above the ground, and moths flew differentially at times, and heights, when favourable (i.e. northerly) winds occurred. This facilitated the maximum displacement of moths towards the south during these 'return' migrations. The moths flew over the radar site at consistently high densities through the night, and the resulting flight durations of c. 10 h, at displacement speeds of 30-33 km h-1, would allow moths emerging in the far northeast of China (i.e. Liaoning and Jilin provinces and the Inner Mongolia autonomous region) to migrate into northern China (Hebei, Shandong and Henan provinces). The association of the seasonal migratory movements of H. armigera with crops in northern China is briefly discussed.
2001年和2002年，在中国河北省廊坊市，利用雷达和两种诱虫灯对棉铃虫（Helicoverpa armigera (Hübner)）的秋季迁飞进行了观测。在探照灯诱捕器中，棉铃虫蛾的比例突然增加，这表明有迁飞昆虫进入该地区，并且由于黎明前迁飞昆虫的降落，夜间后半段的诱捕量增加了10倍。棉铃虫的迁飞发生在距地面高达2000米的高度，当出现有利（即北风）风向时，棉铃虫在不同时间和高度飞行。这有利于在这些“返程”迁飞过程中，棉铃虫最大限度地向南迁移。夜间，棉铃虫持续以高密度飞过雷达监测点，由此产生的飞行持续时间约为10小时，飞行速度为30 - 33千米/小时，这将使在中国最东北部（即辽宁省、吉林省和内蒙古自治区）羽化的棉铃虫能够迁飞到中国北方（河北省、山东省和河南省）。本文还简要讨论了棉铃虫季节性迁飞活动与中国北方农作物的关系。
