Prevalence of four species of egg parasitoids attacking tabanid eggs in Manitoba, Canada

Publication Type:Journal Article
Year of Publication:2008
Authors:M. Iranpour, Galloway T. D.
Journal:Canadian Entomologist
Volume:140
Pagination:603-610
Date Published:September-Octobe
Type of Article:Article
ISBN Number:0008-347X
Keywords:[Manitoba / / prevalence]., Canada, Chrysops aestuans, Chrysops aestuans (Tabanidae): [Host]., Hosts, Hybomitra nitidifrons nuda (Tabanidae): [Host]., Hybomitra nitidifrons nuda [Coleopteran parasites /, Hybomitra nitidifrons nuda / ] [Manitoba / / prevalence]., hybomitrae / ] [ / Telenomus utilis / ] [ / Trichogramma semblidis / ], Insect hosts, Insect parasites, Land zones, Nearctic region, North America, Parasites, Parasites diseases and disorders, Telenomus chrysopsis, Telenomus chrysopsis (Tenebrionidae): [Parasite]., Telenomus chrysopsis / ] [Hymenopteran parasites / Telenomus, Telenomus hybomitrae, Telenomus hybomitrae (Scelionidae): [Parasite]., Telenomus utilis, Telenomus utilis (Scelionidae): [Parasite]., Trichogramma semblidis (Trichogrammatidae): [Parasite]., Trichogramma semblidis [Dipteran hosts / Chrysops aestuans / ] [ /
Abstract:

Egg masses of the horse fly, Hybomitra nitidifrons nuda (McDunnough), and the deer fly, Chrysops aestuans Wulp (Diptera: Tabanidae), were collected during the summers of 1996-2000 from five different locations in southern Manitoba. On average, hymenopterous egg parasitoids were reared from more than 90% of collected egg masses. Telenomus hybomitrae Iranpour and Galloway and (or) Telenomus utilis Iranpour and Galloway (Hymenoptera: Platygastridae: Telenominae) emerged from multilayered egg masses of H. n. nuda. However, Trichogramma semblidis (Aurivillius) (Hymenoptera: Trichogrammatidae) and (or) Telenomus chrysopsis Iranpour and Galloway were reared from single-layered egg masses of C. aestuans. In H. n. nuda egg masses, more than 33% of individual eggs were parasitized and more than ail additional 35% were apparently damaged by the two telenomine parasitoids. In C. aestuans egg masses, approximately 40% of individual eggs were parasitized and 18% produced neither parasitoids nor larvae.

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