杨柳小卷蛾生物学特性及发生规律研究

Biological characteristics and occurrence pattern of Gypsonoma minutara Hübner

为摸清杨柳小卷蛾Gypsonoma minutara Hübner的生活习性、发生规律及在鲁西南地区的生活史,通过室内饲养与林间调查相结合的研究方法,观测杨柳小卷蛾成虫、卵、幼虫、蛹的形态特征,林间调查其生物学特性和发生规律。结果表明:该虫1 a发生3代,以初龄幼虫在树皮缝隙等处结薄茧越冬。5龄幼虫吐丝缀叶危害。3代幼虫的孵化盛期分别在6月中旬、8月上旬、9月中旬,有世代重叠现象。成虫有趋光性和趋化性,单雌产卵量平均64.3粒。研究结果可为杨柳小卷蛾防控提供重要参考。

The morphological characteristics of adults,eggs,larvae and pupae were observed and investigated in field and laboratory.The life habits,the occurrence pattern and the life-history of Gypsonoma minutara Hübner in south-west area of Shandong were found out during the five-years work.The insect had 3 generations a year,and the early-instar larvae made a cocoon in bark cracks or other cracks in the trunks to overwinter.The 5 th instar spun and fed on leaves.The dominant hatching period of larva occured in middle June,early August and middle September with overlapped generations.The adults of G.minutara had stronger photokinesis and chemotaxis.The average number of oviposition of the female adult was 64.3.The research provided an important reference for the control of G.minutara.