摘要
为掌握黑色敛片叶蜂的生物学特性及扩散趋势,通过近三年的野外观察和室内饲养,基本弄清了该虫的生活史、生活习性、有效积温及扩散趋势,结果表明:(1)黑色敛片叶蜂一年发生 1代,每年 3月上旬成虫大量羽化出土,幼虫于 3月下旬至 4月上旬群聚危害桂花叶片,老熟幼虫下树在土中作茧越冬;(2)对各虫态识别特征进行了描述,并根据其发生规律提出了具体的防治建议;(3)蛹、成虫、卵及入土结茧前幼虫的发育起点温度分别为5.23℃、10.13℃、9.56℃和6.40℃,有效积温分别为91.30 d·℃、14.58 d·℃、44.93 d·℃和95.21 d·℃.(4)该虫主要沿相邻道路扩散,适生海拔为500 m～1 200 m.
Abstract
In order to clarify the biological characteristics and spread trend of Tomostethus nigritus(Fabricius),the life history,living habits,effective accumulated temperature and diffusion trend of this insect were basically clarified through field observation and indoor breeding in the past three years.The results showed that:(1)T.nigritus(Fabricius)occurred once a generation every year,and a large number of adults emerged in early March every year.Larvae gathered in late March to early April and damaged the leaves of osmanthus flowers,and the old larvae overwintered in the soil;(2)The identification characteristics of each insect stage were described,and specific control suggestions were put forward according to its occurrence law.(3)The developmental zero temperatures of pupae,adults,eggs and pre-cocoon forming larvae were 5.23℃,10.13℃,9.56℃and 6.40℃,respectively,and the effective accumulated temperatures were 91.30 d·℃,14.58 d·℃,44.93 d·℃and 95.21 d·℃,respectively.(4)The insect mainly spreads along adjacent roads,and the suitable altitude is 5 00 m～1 200 m.
维普
万方数据