双色鹿尺蠖形态特征及生物学特性初步观察

Morphological characteristics and bionomics of Alcis bastelbergeri

双色鹿尺蠖Alcis bastelbergeri(Hirschke,1908)是危害华北落叶松Larix principis-rupprechtii和白桦Betula platyphylla的主要害虫,2012年在内蒙古地区首次发现。作者采用室内饲养与林间笼养调查相结合的方法,研究明确了该虫卵、各龄幼虫、蛹和成虫的形态特征及生物学特性。室内卵产在笼壁上,室外产在树干、树杈、杂草上,呈不规则散布,产卵量200余粒,卵历期11~15 d;幼虫共5龄,以2龄幼虫越冬;老熟幼虫在树冠下土层中化蛹,暗红色,蛹历期20~24 d;成虫灰褐色,雌蛾平均寿命15 d,林间雌雄比为1∶1.1。

Alcis bastelbergeri（ Hirschke,1908）,first found in the Inner M ongolia Autonomous Region in 2012,is an important pest attacking Larix principis-rupprechtii and Betula platyphylla. The morphological characteristics and bionomics of A. bastelbergeri at each stage w ere studied in insect cage w ith laboratory observation and field investigation,and w ere reported in details.In the lab,eggs w ere laid on the w alls of insect cages w hile in the field eggs w ere laid on trunks,branches,and w eeds. Each female laid over 200 eggs w ith irregularity separation,and the egg hatched for 11-15 days.The larvae had 5 instars and overw intered as 2 nd instar stage. The mature larvae pupated in soil,and the pupae w ere dark red in color. The pupal duration w as 20-24 days.The adults w ere taupe.The average life span of females w as 15 d,and the ratio of female to male w as 1： 1. 1 in forest.