New Record for Woldstedtius flavolineatus (Ichneumonidae: Diplazontinae), a Hymenopteran Parasitoid of Syrphid Flies in Hawaii

dc.contributor.author Cappadonna, Justin
dc.contributor.author Euaparadorn, Melody
dc.contributor.author Peck, Robert W.
dc.contributor.author Banko, Paul C.
dc.date.accessioned 2009-12-05T00:33:58Z
dc.date.available 2009-12-05T00:33:58Z
dc.date.issued 2009-12-01
dc.description.abstract The parasitoid wasp Woldstedtius flavolineatus (Gravenhorst) (Ichneumonidae) attacks the larvae of syrphid flies (Syrphidae). Woldstedtius flavolineatus was collected in Hawaii for the first time during an extensive malaise trap-based survey of parasitoids in Hawaiian forests. Since its initial collection on Hawaii Island in January 2006, it has been collected at five additional sites on Hawaii Island and at one site each on Maui and Oahu. Malaise trap results from Hakalau Forest National Wildlife Refuge showed a strong seasonal pattern of abundance, with peak population levels reached during July–September. Rearing of its host, Allograpta obliqua (Say), collected from koa (Acacia koa Gray) at Hakalau over two days, revealed a parasitism rate of approximately 95%. Broader impacts of this alien wasp are unknown, but a reduction in host syrphid abundance could result in an increase in numbers of psyllids and aphids (Homoptera) that are preyed upon by syrphid larvae. Furthermore, a reduction in adult syrphids could impact the reproductive success of some of the plants they pollinate.
dc.format.extent 7 pages
dc.identifier.citation Cappadonna J, Euaparadorn M, Peck RW, Banko PC. 2009. New record for Woldstedtius flavolineatus (Ichneumonidae: Diplazontinae), a hymenopteran parasitoid of syrphid flies in Hawaii. Proc Hawaiian Entomol Soc 41:105–111.
dc.identifier.issn 0073-134X
dc.identifier.uri http://hdl.handle.net/10125/14453
dc.language.iso en-US
dc.publisher Hawaiian Entomological Society
dc.subject Allograpta obliqua
dc.subject Hawaii
dc.subject introduced species
dc.subject new geographic records
dc.subject parasitoids
dc.subject seasonal variation
dc.subject Syrphidae
dc.subject trophic relationships
dc.subject Woldstedtius flavolineatus
dc.title New Record for Woldstedtius flavolineatus (Ichneumonidae: Diplazontinae), a Hymenopteran Parasitoid of Syrphid Flies in Hawaii
dc.type Article
dc.type.dcmi Text
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