Lifehistory and host preference of Emphasis Type

Authors: XinGeng Wang Gülay Kaçar Antonio Biondi Kent M Daane

Publish Date: 2016/02/08

Volume: 61, Issue: 4, Pages: 387-397

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Abstract

Trichopria drosophilae is a cosmopolitan pupal parasitoid that attacks many species of Drosophilidae including the invasive Drosophila suzukii This study reports on the lifehistory traits and host preferences of a Californian population of T drosophilae and compares its lifetime fecundity with a South Korean population of T drosophilae Female parasitoids emerge with a high mature eggload 476 ± 23 eggs per female The number of mature eggs of female T drosophilae was affected by the female age and body size but not by the interaction between these two factors The parasitoid did not show preference among differently aged 1–4 days old D suzukii pupae and host age did not affect the parasitoid’s fitness except that offspring developmental time slightly increased with host age In a choice test more offspring successfully developed from the larger D suzukii than the smaller D melanogaster and adult females reared from D suzukii were larger than those that were reared from D melanogaster apparently at no cost in parasitoid fitness T drosophilae females from the Californian and the South Korean populations survived 275 and 202 days produced a total of 638 and 520 offspring and had an intrinsic rate of increase of 0124 and 0113 respectively when provided with adult food and D suzukii pupae as host materialFunding for research was supported by the California Cherry Board and the USDA APHIS Farm bill fund 1481300463 We thank Jeffrey Miller Peter Shearer and Betsey Miller Oregon State University for foreign exploration in South Korea funded by the USDANIFA award 20105118121167 Matthew Buffington USDAARS for the identification of the parasitoid John Hutchins and Marilyn Chan University of California Berkeley for assistance in colony maintenance We also thank Betsey Miller for useful comments on an early version of this manuscript Gülay Kaçar was supported by the Scientific and Technological Research Council of Turkey TUBITAK Antonio Biondi received funding from the People Programme Marie Curie Actions of the European Union’s Seventh Framework Programme FP7/20072013/under REA Grant agreement 318246 and from the Italian Ministry of Education University and Research PRIN project GEISCA 2010CXXHJE 004 Marilyn Chan was supported by Sponsored Projects for Undergraduate Research SPUR

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