不同虫态稻虱缨小蜂低温贮藏后的适合度  

Effects of Cold Storage on the Fitness of Anagrus nilaparvatae Pang and Wang(Hymenoptera:Mymaridae)

作　　者：张居念[1] 连玲[1] 吴春珠[1] 董萌 施龙清[1] 解振兴[1] 姜照伟[1] 占志雄[1] ZHANG Junian;LIAN Ling;WU Chunzhu;DONG Meng;SHI Longqing;XIE Zhenxing;JIANG Zhaowei;ZHAN Zhixiong(Rice Research Institute,Fujian Academy of Agricultural Science,Fuzhou 350018,China)

机构地区：[1]福建省农业科学院水稻研究所,福州350018

出　　处：《中国生物防治学报》2023年第5期1015-1028,共14页Chinese Journal of Biological Control

基　　金：福建省科技计划公益类专项(2021R10230010);福建省自然科学基金(2022J01452);福建省农业科学院科技创新团队项目(CXTD2021002-2)。

摘　　要：为探究稻虱缨小蜂适宜冷藏的虫态以及冷藏温度和冷藏时间,在5℃~12℃范围内对稻虱缨小蜂各虫态进行冷藏。结果表明,稻虱缨小蜂卵冷藏后部分不能正常孵化,不适合在卵期进行冷藏。稻虱缨小蜂在幼虫期和蛹期冷藏,成虫寿命随温度的升高而缩短,随冷藏时间的延长而缩短;对性比和子代数不造成影响;羽化率随着冷藏温度的下降而下降,随着冷藏时间的延长而下降,幼虫期不同虫龄之间以及不同虫龄与蛹龄之间的羽化率无显著差异;11℃冷藏的羽化率受冷藏时间的影响最小,冷藏20d的平均羽化率高于80.00%,与对照相比差异不显著。隐羽化期和成虫期受低温和冷藏时间的影响较大,不适合冷藏。因此,本研究结果表明稻虱缨小蜂冷藏效果最好的虫态为幼虫期和蛹期,11℃为适宜冷藏温度。Anagrus nilaparvatae is an important parasitoid of rice planthopper eggs with strong controlling effects on planthoppers.The suitable developmental stage for low temperature storage and the low temperatures and the duration of low-temperature storage for Anagrus nilaparvatae were investigated using wheat seedlings as the oviposition substrates and Laodelphax striatellus as the hosts for A.nilaparvatae stored at 5℃-12℃.The results showed that some eggs of A.nilaparvatae did not hatch normally after low-temperature storage and egg is not suitable for cold storage.When A.nilaparvatae were stored at the larval stage,the emergence rate and the lifespan of resulting adults decreased with increasing storage temperature and prolonged storage time,with no significant difference between different instars.There was no effect of storage temperature on the sex ratio and progeny number.The emergence at 11℃ was the least affected by storage time,with an average rate of over 80.00%after 20 days of storage,which was not significantly different from the control group.The effects of cold storage at the pupal stage on emergence rate,sex ratio,lifespan,and progeny number were similar to those of storage at the larval stage,with 11℃ being the most effective storage temperature.The effects of low temperature and storage time on the cryptoeclosion stage and adult stage were also significant and thus these stages were not suitable for cold storage.Therefore,this study suggests that the larval and pupal stages are the most suitable stages for cold storage of A.nilaparvatae,and the recommended cold storage temperature is 11℃.

关 键 词：稻虱缨小蜂 冷藏 适合度 

分 类 号：S476.3[农业科学—农业昆虫与害虫防治]