摘要
杨黑点叶蜂（Pristiphora conjugata Dahlb．）属于膜翅目（Hymenoptera）、叶蜂科（Tenthredinidae），是杨树人工林及苗圃猖獗发生的食叶害虫。近年来，延边大学教学试验基地8～9年生“三北一号”人工杨树林遭到该虫严重危害，受害株率达100％，受害叶片仅剩叶柄，被害严重的杨树整株叶片全部被吃光。杨黑点叶蜂世代重叠，成虫个体小，在叶片组织内产卵，以老熟幼虫在表层土或树基部结茧化蛹越冬，除幼虫外，其它虫态均很隐蔽。了解杨黑点叶蜂各虫态的形态特征，是识别和开展该害虫研究和防控工作的基础。因此，作者对该虫的成虫、幼虫、茧的外部结构特征进行了观察。
[ Objective] The morphology and biology of Pristiphora conjugata （Dahlbom） were studied to lay a basis for controlling this pest. [ Method ] The morphology, life history and effects of temperature on adult life-span of Pristiphora conjugata were studied in both laboratory and field. [ Result ] The results showed that P. conjugata has 6 generations per year in Wuqing district of Tianjin and it took 20 - 38 days to complete one generation. The pupae of P. conjugata overwinter in top soil or at the base of trees. The newly-hatched larvae of the first generation were observed on April 25th and the generations overlapped from May to September. The mature larvae pupate inside a cocoon in the soil in late September. The larvae have enormous appetite and gregarious. The temperature has significant effect on adult life-span of P. conjugata： the high temperature （30℃, 25℃ ） was unfavorable to its survival, and adults have the longest life-span under 20℃ condition. [ Conclusion]P. conjugata has 6 generations per year in Tianjin and the temperature has significant effect on adult life-span.
出处
《林业科学研究》
CSCD
北大核心
2016年第5期793-796,共4页
Forest Research
基金
天津市财政预算项目:杨树直角叶蜂和杨黑点叶蜂生物学特性和防治技术研究(2014-2016)
关键词
杨黑点叶蜂
形态特征
生活史
温度
成虫寿命
Pristiphora conjugata
morphology
life history
temPerature
adult life-span
