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THE LIFE HISTORY AND IMMATURE STAGES OF BANCHUS FLAVESCENS (HYMENOPTERA: ICHNEUMONIDAE), A PARASITOID OF THE BERTHA ARMYWORM, MAMESTRA CONFIGURATA (LEPIDOPTERA: NOCTUIDAE) IN WESTERN CANADA1

Published online by Cambridge University Press:  31 May 2012

A.P. Arthur  and
P.G. Mason
A.P. Arthur
Affiliation:
Agriculture Canada Research Station, Saskatoon, Saskatchewan, Canada S7N 0X2
P.G. Mason
Affiliation:
Agriculture Canada Research Station, Saskatoon, Saskatchewan, Canada S7N 0X2
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Abstract

Banchus flavescens Cresson is the most abundant hymenopterous parasitoid of the bertha armyworm, Mamestra configurata Walker, in western Canada. The females attack 1st, 2nd, and 3rd instars of the host. The speed of parasitoid development is adjusted so that the 2nd instar is completed when the host finishes feeding. Banchus flavescens has an obligate diapause and overwinters as a prepupa within a cocoon in the soil. Notes on life history and descriptions of the egg and 5 larval instars of B. flavescens are given.

Résumé

Banchus flavescens Cresson est le parasite hyménoptère le plus abondant de la légionnaire bertha, Mamestra configurata Walker, dans l'ouest du Canada. Les femelles s'attaquent aux premier, deuxième et troisième stades de développement de l'hôte. Le rythme de développement du parasite est adapté de telle sorte que le deuxième stade est complété lorsque l'hôte a fini de se nourrir. Banchus flavescens a une diapause obligatoire et hiverne sous forme de prépupe dans un cocon enfoui dans le sol. Les auteurs présentent des notes sur le cycle biologique et des descriptions de l'oeuf et des 5 stades larvaires de B. flavescens.

Type
Articles
Information
The Canadian Entomologist , Volume 117 , Issue 10 , October 1985 , pp. 1249 - 1255
Copyright
Copyright © Entomological Society of Canada 1985

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