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INTERACTIONS BETWEEN TWO BACULOVIRUSES AND SEVERAL INSECT PARASITES

Published online by Cambridge University Press:  31 May 2012

Phyllis G. Hotchkin  and
Harry K. Kaya
Phyllis G. Hotchkin
Affiliation:
Department of Entomology, University of California, Davis 95616
Harry K. Kaya
Affiliation:
Division of Nematology, University of California, Davis 95616
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Abstract

Several parasites were surveyed for their ability to develop to pupation in virus-infected hosts. The tachinid Compsilura concinnata (Meigen), the ichneumonids Campoletis sonorensis (Cameron) and Hyposoter exiguae (Viereck), and the braconid Cotesia marginiventris (Cresson) developed to pupation in the armyworm, Pseudaletia unipuncta (Haworth), infected with either the Hawaiian strain of granulosis virus (HGV) or the hypertrophy strain of nuclear polyhedrosis virus (HNPV). The braconid Chelonus insularis Cresson died after its HGV- or HNPV-infected host P. unipuncta died. On the other hand, the braconid Glyptapanteles militaris (Walsh) died in HNPV-infected P. unipuncta before the host died. Some of these parasites had tissues that were melanized and some were encapsulated by the host. The ichneumonid H. exiguae and the braconids Chelonus insularis and Cotesia marginiventris developed to pupation in HGV-infected Spodoptera exigua (Hübner). In some cases, developmental time of parasites in virus-infected hosts was longer than in control hosts.

Résumé

La capacité de plusieurs parasites à se développer jusqu'au stade pupal chez des hôtes virosés a été étudiée. La tachine Compsilura concinnata (Meigen), les ichneumons Campoletis sonorensis (Cameron) et Hyposoter exiguae (Viereck), et le braconide Cotesia marginiventris (Cresson) ont pu se développer et s'empuper chez la légionnaire Pseudaletia unipuncta (Haworth), infectée soit par une souche hawaienne de granulose (HGV), ou par la souche hypertrophie du virus de la nucléopolyhédrose (HNPV). Le braconide Chelonus insularis Cresson est mort suite à la mort de son hôte, P. unipuncta, infecté du HGV ou du HNPV. Cependant le braconide Glyptapanteles militaris (Walsh) est mort dans son hôte P. unipuncta infecté du HNPV, avant que celui-ci ne meure. Chez certains de ces parasites, les tissus étaient mélanisés, et certains ont été encapsulés par l'hôte. L'ichneumon H. exiguae et les braconides Chelonus insularis et Cotesia marginiventris ont pu se développer jusqu'au stade pupal chez Spodoptera exigua (Hübner) infecté de HGV. Dans certains cas, le temps de développement des parasites d'hôtes virosés était allongé par rapport à celui d'hôtes témoins.

Type
Articles
Information
The Canadian Entomologist , Volume 115 , Issue 7 , July 1983 , pp. 841 - 846
Copyright
Copyright © Entomological Society of Canada 1983

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