摘要
2007—2009年研究了洞庭湖地区杨树主要食叶害虫杨小舟蛾的生物学特性。该虫在洞庭湖地区一年发生7～8代,以蛹在地面枯枝落叶层、疏松浅土层或缝隙中越冬。第1～7代平均历期分别为39 d、28 d、26 d、23 d、25 d、29 d、32 d。4月上中旬、5月中旬、6月上中旬、7月上中旬、8月上旬、8月下旬、9月中下旬、10月下旬分别为越冬代成虫、第1～6代成虫及第7代当年羽化部分成虫的羽化高峰。第1～3代发育比较整齐,第4代后世代重叠逐代加重。
The biological characteristics of Micromelalopha troglodyta,which is an important poplar leaf-eating pest in Dongting Lake area,were studied during 2007—2009.Results showed that M.troglodyta developed 7~8 generations a year in this area and lived through the winter in litter layer,porous shallow soil layer or crack in the form of pupae.The mean stages from 1 st to 7 th generations were 39d,28d,26d,23d,25d,29d,32d respectively.And the eclosion peak seasons of overwintering generation,1st^6th generations and seventh-generation were early-middle April,mid May,early-middle June,early-middle July,early August,late August,middle-late September and late October respectively.M.troglodyta in 1st^3rd generation developed relatively uniform and the generations overlapping after fourth-generation was more complicated.
出处
《湖南林业科技》
2011年第1期6-8,共3页
Hunan Forestry Science & Technology
关键词
杨小舟蛾
生物学特性
杨树
Micromelalopha troglodyta
biological characteristics
poplar
