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冷藏时间对褐带卷蛾茧蜂寄生和繁殖的影响
Effects of cold storage time on parasitism and reproduction of Bracon adoxophyesi Minamikawa
钟宝珠,吕朝军,李文莲,李朝绪
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DOI:10.7679/j.issn.2095-1353.2023.017
作者单位:中国热带农业科学院椰子研究所,文昌 571339
中文关键词:褐带卷蛾茧蜂;低温贮藏;存活率;寄生效果;产卵
英文关键词:Bracon adoxophyesi Minamikawa; low-temperature storage; survival rate; parasitic effect; oviposition
中文摘要:

目的 明确不同冷藏时间对褐带卷蛾茧蜂Bracon adoxophyesi Minamikawa存活、寄生和繁殖的影响,为褐带卷蛾茧蜂的低温保存技术提供理论依据。方法 在10 ℃条件下,测定不同冷藏时间(30、45、60、75、90和105 d)对褐带卷蛾茧蜂的存活、寄生、产卵和子代发育的影响。结果 褐带卷蛾茧蜂成蜂冷藏30 d 和45 d时存活率分别为97.35%和82.07%,且两者之间差异不显著;随着冷藏时间的延长,褐带卷蛾茧蜂成蜂的存活率呈降低的趋势,冷藏75 d时,寄生蜂存活率仅为46.77%;褐带卷蛾茧蜂冷藏30-75 d后对雌蜂刺死寄主(大蜡螟)数量无显著差异,刺死率平均为79.00%-92.00%,与对照(刺死率99.00%)相比差异不显著;冷藏显著降低褐带卷蛾茧蜂对寄主的寄生率,冷藏30 d后褐带卷蛾茧蜂对寄主的寄生率为25.00%,而对照的寄生率为44.00%;冷藏可提高寄生蜂的产卵量,冷藏30 d时褐带卷蛾茧蜂的产卵总量最高,为78.60粒,其次为冷藏60 d和45 d,产卵量分别为71.33和70.00粒,均显著高于对照(47.80粒);褐带卷蛾茧蜂冷藏后对其子代的卵孵化、幼虫化蛹和成虫羽化未产生明显的影响,但降低子代性比(♀︰♂)。结论 褐带卷蛾茧蜂在冷藏30-60 d下对其刺死寄主无影响,产卵量较对照高,建议褐带卷蛾茧蜂的冷藏时间在60 d以内。

英文摘要:

 [Objectives]  To clarify the effects of cold storage time on the survival, parasitism and reproduction of Bracon adoxophyesi Minamikawa,and thereby improve the low-temperature storage of this parasitic wasp. [Methods]  The effect of keeping B. adoxophyesi at 10 ℃ for 30, 45, 60, 75, 90 and 105 d on adult survival rate, parasitism, oviposition and offspring development, were measured and compared. [Results]  The survival rates of adults were 97.35% and 82.07% after 30 and 45 d cold storage, respectively. Survival declined with longer periods of cold storage to a minimum of 46.77% after 75 days. There was no significant difference in the number of hosts(Galleria mellonella Linnaeus)killed by, or the average mortality rate (79.00%-92.00%) of, female wasps that had been subject to 30-75 d cold storage compared to the control group (99.00%). However, cold storage significantly reduced the parasitism rate which was 25.00% after 30 days cold storage compared to 44.00% for the control. Cold storage increased the oviposition rate; the highest total number of eggs laid (78.60) was recorded after 30 d cold storage, followed by 60 d and 45 d (71.33 and 70.00, respectively), all of which were significantly higher than the control (47.80). Cold storage in did not affect hatching, pupation or adult emergence of progeny, but did decrease the ♀︰♂ sex ratio of offspring. [Conclusion]  Storing B. adoxophyesi at 10 ℃ for 30-60 d had no effect on the host paralysis rate, and increased the oviposition rate relative to the control. B. adoxophyesi should be kept in cold storage for no more than 60 d.

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