章古台地区松毒蛾幼虫秋末生活习性研究

Study on the life habits of larvae of Dasychira axutha in late autumn in Zhanggutai area

为研究章古台地区人工林松毒蛾第二代老熟幼虫空间分布特征、形态特征和食物偏爱,2021年9月末对当地人工林松毒蛾幼虫进行调查。结果表明,第2代松毒蛾老熟幼虫主要集中在树下部,喜食樟子松和彰武松针叶;彰武松上幼虫体型最细长,幼虫在越冬前体长分布主要集中在4~4.5 cm,体重分布主要集中在1~1.2 g,且符合正态分布。

The larvae of Dasychira axutha in the plantation was investigated and analyzed at the end of September 2021 in Zhanggutai area,in order to study the spatial distribution characteristics,morphological characteristics and food preference of the second generation of mature larvae in the plantation.The results showed that the mature larvae of the second generation mainly concentrated at the bottom of the tree,and preferred to eat the needles of Pinus sylvestris var.mongolica and Pinus densiflora var.zhangwuensis.The larvae on P.densiflora var.zhangwuensis were the longest and thinnest,and their body length were from 4 to 4.5 cm and their body weight were from 1 to 1.2 g before the winter,which conformed to normal distribution.