Induction of Reproductive Diapause in Habrobracon hebetor (Hymenoptera: Braconidae) When Reared at Different Photoperiods at Low Temperatures

文献类型： 外文期刊

第一作者： Chen, Haoliang

作者： Chen, Haoliang;Zhang, Hongyu;Chen, Haoliang;Zhang, Hongyu;Chen, Haoliang;Zhu, Kun Yan;Throne, James E.

作者机构：

关键词： biological control;ectoparasitoid;Habrobracon hebetor;photoperiod;reproductive diapause

期刊名称：ENVIRONMENTAL ENTOMOLOGY （ 影响因子：2.377； 五年影响因子：2.298 ）

ISSN： 0046-225X

年卷期： 2012 年 41 卷 3 期

页码：

收录情况： SCI

摘要： Development of the parasitoid Habrobracon hebetor (Say) (Hymenoptera: Braconidae) at low temperatures was determined to identify rearing conditions that might result in adults that were in reproductive diapause. Diapausing adults would be expected to survive cold storage longer than nondiapausing adults for use in biological control programs. Only a few eggs were found in the ovaries when H. hebetor females were reared during the immature stages at 17.5 and 20 degrees C with a 16-h photoperiod, and the ovaries were poorly developed and contained no eggs when females were reared with a 10-h photoperiod in these low temperatures. Rearing H. hebetor at 17.5 and 20 degrees C did not result in diapause of immature stages, but did appear to result in possible adult reproductive diapause when the immature stages were reared with a 10-h photoperiod. Females reared during the immature stages at 17.5 degrees C with a10-h photoperiod lived longer and took longer to lay their first eggs and to lay 50% of their eggs than those females reared at 17.5 degrees C with a16-h photoperiod. Females reared during the immature stages at 20 degrees C with a10-h photoperiod took longer to lay their first eggs and to lay 50% of their eggs, and they had a lower respiration rate, than those females reared at 20 degrees C with a16-h photoperiod. Females that were reared in conditions that appeared to induce reproductive diapause resumed oviposition and their respiration rate increased soon after being transferred to a higher temperature (27.5 degrees C). Thus, females reared at a 10-h photoperiod at 17.5 and 20 degrees C appear to enter reproductive diapause.

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