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OBSERVATIONS ON THE LONGEVITY AND FECUNDITY OF ORGILUS OBSCURATOR (HYMENOPTERA: BRACONIDAE) AND THE EFFECTS OF CERTAIN FOODS ON LONGEVITY

Published online by Cambridge University Press:  31 May 2012

Paul D. Syme
Paul D. Syme
Affiliation:
Great Lakes Forest Research Centre, Canadian Forestry Service, Sault Ste. Marie, Ontario
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Abstract

A study was made of the longevity and fecundity of Orgilus obscurator Nees and of the effects on longevity of feeding on various flowers. This parasite is pro-ovigenic, requiring little, if any, energy to develop its eggs, but the oviposition rate of 10 eggs per day requires a longevity of up to 3 weeks to utilize fully the potential of 160–200 eggs. Feeding on several species of flowers permits this longevity. The implications of the presence of these flowering plants within pine plantations for the success of parasites are discussed and the establishment and encouragement of Daucus carota L., Fagopyrum esculentum Moench, Asclepias syriaca L., and Nepeta cataria L. in plantations are recommended within the bounds of local weed control legislation.

Résumé

On a procédé à une étude sur la longévité et la fécondité du parasite Orgilus obscurator Nees et sur les effets de son alimentation à même différentes fleurs sur sa longévité. Ce parasite est pro-ovigène, exigeant peu ou pas d’énergie pour développer ses oeufs, mais un taux de ponte de 10 oeufs par jour requiert une longévité de jusqu’à 3 semaines afin d’utiliser pleinement le potentiel de 160 à 200 oeufs. Une alimentation à même plusieurs espèces de fleurs permet une telle longévité. Les implications de la présence de ces plantes à fleurs au sein des plantations de Pins assurant le succès des parasites sont l’objet de cette étude et l’auteur recommande d’introduire et de favoriser Daucus carota L., Fagopyrum esculentum Moench, Asclepias syriaca L. et Nepeta cataria L. dans les plantations, tout en se conformant à la législation touchant la répression locale des mauvaises herbes.

Type
Articles
Information
The Canadian Entomologist , Volume 109 , Issue 7 , July 1977 , pp. 995 - 1000
Copyright
Copyright © Entomological Society of Canada 1977

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