摘要
白蛾黑棒啮小蜂Tetrastichus septentrionalis是美国白蛾Hyphantria cunea的重要寄生性天敌之一,具有重要应用前景.以黄粉甲Tenebrio molitor蛹为替代寄主繁育白蛾黑棒啮小蜂,研究其寄生行为及生物学特性,可为白蛾黑棒啮小蜂大规模繁育应用于美国白蛾生物防治提供参考.研究表明,白蛾黑棒啮小蜂的交配行为可分为交配前期、交配中期和交配后期 3个阶段,寄生行为分为搜寻、刺探、产卵和产卵后梳理4个阶段;胚胎发育期可分为胚胎发育早期、胚胎伸长及器官形成期和胚胎成熟期;胚后发育包括幼虫期、蛹期和成虫期;刚羽化的雌蜂卵巢内不含有成熟卵粒,成熟卵出现于羽化 24 h后.在 18℃、21℃、24℃、27℃和30℃五个温度梯度条件下测定白蛾黑棒啮小蜂全世代发育历期达59.35 d、31.20 d、22.85 d、18.45 d和 13.90 d,其发育起点温度和有效积温分别为 14.15℃和 225.06 d·℃.
Abstract
Tetrastichus septentrionalis is one of important parasitic natural enemies of Hyphantria cunea,showing wide application potential in biological control.The parasitic behavior and biological characteristics of T.septentrionalis were studied,which could provide a reference for its large-scale breeding with Tenebrio molitor pupa as an alternative host for control of Hyphantria cunea.The results showed that the whole mating behaviors of the wasp consisted of three phases:pre-copulating,mid-copulating and post-copulating.Parasitic behavior was divided into four phases:searching,probing,oviposition,and combing after oviposition.The embryonic development could be divided into early embryo development,period of embryo elongation and organogenesis,and period of embryo maturation.Post-embryonic development included the larval stage,pupal stage and adult stage.There were no mature eggs in the ovaries of newly emerged females,and mature eggs appeared after 24 h of emergence.The whole generation durations of T.septentrionalis were 59.35 d,31.20 d,22.85 d,18.45 d,and 13.90 d at 18℃,21℃,24℃,27℃,and 30℃,respectively.The developmental threshold temperature of T.septentrionalis was 14.15℃,and the effective accumulated temperature was 225.06 d·℃.
国家科技期刊平台
NSTL
万方数据