Life history and life table of the host-feeding parasitoid <Emphasis Type="Italic">Hemiptarsenus varicornis</Emphasis> (Hymenoptera: Eulophidae) |
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Authors: | Xiao-Qin Cheng Feng-Qin Cao Yi-Bo Zhang Jian-Yang Guo Fang-Hao Wan Wan-Xue Liu |
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Institution: | 1.College of Environment and Plant Protection,Hainan University,Haikou,People’s Republic of China;2.State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing,People’s Republic of China |
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Abstract: | Hemiptarsenus varicornis (Girault), a destructive host-feeding wasp, is an important biocontrol agent/larval ectoparasitoid of agromyzid leafminers worldwide. In the present study, the life history and life table of H. varicornis reared with Liriomyza trifolii (Burgess) were studied at a constant 27 °C. The developmental durations of female and male eggs, larvae, prepupae, pupae and total immature wasps were 1.00 and 1.00, 2.57 and 2.62, 0.45 and 0.37, 3.88 and 3.52, and 7.90 and 7.52 days, respectively. This wasp showed three types of host-killing behavior: reproductive parasitization (parasitism), non-reproductive host feeding (host feeding), and host stinging without oviposition or feeding (host stinging), resulting in 133.9, 303.8, and 84.2, respectively, killed host larvae. We confirm that H. varicornis is a strong synovigenic parasitoid, with an ovigeny index of 0.003. The number of host-feeding events was strongly correlated with parasitism, host-stinging events, longevity and total host mortality. The intrinsic rate of increase, the finite rate of increase, the net reproductive rate, the gross reproduction rate, and the mean length of a generation of H. varicornis were 0.3011/day, 1.3624/day, 66.22 offspring/individual, 168.33 offspring/individual, and 13.56 days, respectively. These results could contribute to a better understanding of the biocontrol efficiency of this destructive host feeder. |
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