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Nonreproductive effects are more important than reproductive effects in a host feeding parasitoid

文献类型： 外文期刊

作者： Zhang, Yibo 6 ; Tian, Xiaocao 1 ; Wang, Hao 1 ; Castane, Cristina 3 ; Arno, Judit 3 ; Wu, Suran 4 ; Xian, Xiaoqing 1 ; Liu, Wanxue 1 ; Desneux, Nicolas 5 ; Wan, Fanghao 1 ; Zhang, Guifen 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China

2.Qingdao Agr Univ, Coll Plant Hlth & Med, Qingdao 266109, Peoples R China

3.Inst Res & Technol Agr IRTA, Sustainable Plant Protect Dept, Cabrils 08348, Spain

4.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Haikou, Peoples R China

5.Univ Cote Azur, INRAE, CNRS, UMR ISA, F-06000 Nice, France

6.Minist Agr, Sci Observing & Expt Stn Crop Pests Guilin, Guilin, Peoples R China

期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.996； 五年影响因子：5.516 ）

ISSN： 2045-2322

年卷期： 2022 年 12 卷 1 期

页码：

收录情况： SCI

摘要： When female host feeding parasitoids encounter a potential host, they face a complicated trade-off between either laying an egg for investing in current reproduction or feeding on or killing the host for future reproduction. Few studies have measured these behavioral shift patterns in a given host-parasitoid association thus far. We systematically assessed the behavioral shifts and life history traits of a host feeding parasitoid, Necremnus tutae, on different instars of its host Tuta absoluta. N. tutae females, as idiobiont host feeding parasitoids, can act on the 1st-4th instar larvae of T. absoluta by either host feeding, parasitizing or host killing. Moreover, a significant behavioral shift was observed on different instar hosts. N. tutae preferred to feed on the young hosts (1st and 2nd instars), lay eggs on middle-aged hosts (3rd instars) and kill old hosts (4th instars) by ovipositor-mediated stinging. The offspring of N. tutae showed a significant female-biased sex ratio, with the number of instars of T. absoluta larvae that were parasitized increasing. Specifically, nonreproductive host mortality induced by host feeding and host killing accounted for high percentages of the total mortality (ranging from 70% on 3rd instar hosts to 88% on 1st instar and 4th instar hosts). We hypothesize that N. tutae could be not merely a parasitoid but also a predator. Our results shed light on the nonreproductive abilities of a host feeding parasitoid that should be given further attention, especially when evaluating the efficacy of parasitoids.

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