亚洲舞毒蛾幼龄幼虫刚毛特点及其与扩散关系初探

Characteristics of setae of Lymantria dispar asiatica early instar larva and its relationship with dispersal

本文利用扫描电镜和体视显微镜观察了舞毒蛾Lymantria dispar L.幼龄幼虫的刚毛特点,并在风洞内测量了幼虫的扩散距离。结果发现,舞毒蛾幼虫具有4种形态不同的刚毛,即泡状刚毛、具微刺刚毛、羽状刚毛、线型刚毛,其中,具微刺刚毛长度最长,泡状刚毛数量最多。分析幼虫刚毛特点与其扩散的关系,得出舞毒蛾幼虫扩散距离分别与幼虫的具微刺刚毛长度与头宽之比、羽状刚毛长度与头宽之比具有不同程度的正相关性(P<0.05,R=0.790;P>0.05,R=0.322),与龄期和体重之间分别具有不同程度的负相关性(P<0.01,R=-0.804;P<0.05,R=-0.720)。

The setae characteristics of early instar larvae of the Asian gypsy moth（AGM）,Lymantria dispar were investigated by using a scanning electron microscope and a stereomicroscope.The dispersal of the AGM larvae were studied in a wind tunnel.The result showed that the following four types of setae were found on the AGM larva： bubbly setae,micro barbed setae,penniform setae and linear setae.Among them,Micro barbed setae were the longest and bubbly setae were the most numerous.The dispersal distance of AGM larva is more related to the ratio of micro barbed setae length and head width（P〈0.05,R = 0.790;） than the ratio of penniform setae length and head width（P〈0.05,R =0.322）.On the other hand,the dispersal distance of the larva is negatively correlated with both the age of the larva（P〈0.01,R =-0.804） and the weight of the larva.