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THE EFFECTS OF SELECTED DIETARY SUPPLEMENTS ON SURVIVAL AND REPRODUCTION OF ORIUS INSIDIOSUS (SAY) (HEMIPTERA: ANTHOCORIDAE)

Published online by Cambridge University Press:  31 May 2012

P.C. Richards  and
J.M. Schmidt
P.C. Richards
Affiliation:
Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
J.M. Schmidt
Affiliation:
Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
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Abstract

Diets combining the eggs of Ephestia kuehniella Zeller (Lepidoptera: Pyralidae) with corn pollen, green snap bean pods, and adult western flower thrips [Frankliniella occidentalis Pergrande (Thysanoptera: Thripidae)] were evaluated for their effects on the predatory anthocorid bug Orius insidiosus (Say). Nymphs fed only corn pollen did not complete development. Fourteen percent of the nymphs fed only green bean pod sections reached the adult stage. Females reared on a diet of bean pod sections did not oviposit. Nymphal survival, adult longevity, and fecundity were greatest for diets containing both E. kuehniella and green bean pods. When diets of bean pod sections and eggs of E. kuehniella were supplemented with pollen, egg production was slightly increased. Adult females provided with thrips were not more fecund than females maintained on a diet of eggs of E. kuehniella. Egg production increased significantly with the number of thrips consumed, demonstrating the importance of adult nutrition.

Résumé

Les effets de régimes alimentaires composés de diverses combinaisons d’oeufs d’Ephestia kuehniella Zeller (Lepidoptera : Pyralidae), de pollen de maïs, de gousses de haricots verts et d’adultes du thrips Frankliniella occidentalis Pergrande (Thysanoptera : Thripidae) ont été éprouvés chez la punaise anthocoride prédatrice Orius insidiosus (Say). Les larves nourries uniquement de pollen de maïs n’ont pas réussi à terminer leur développement. Quatorze pourcent des larves nourries exclusivement de morceaux de gousses de haricots verts sont parvenues au stade adulte; les femelles soumises à ce régime n’ont pas pondu. La survie des larves, de même que la longévité et la fécondité des adultes étaient maximales chez les insectes soumis aux régimes contenant à la fois des oeufs du lépidoptère et des gousses de haricots verts. L’addition de pollen à ce régime augmentait légèrement la production d’oeufs. Les femelles adultes nourries aussi de thrips n’étaient pas plus fécondes que les femelles nourries d’oeufs d’E. kuehniella. La production d’oeufs augmentait significativement en fonction du nombre de thrips consommés, ce qui démontre l’importance de la nutrition des adultes.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 128 , Issue 2 , April 1996 , pp. 171 - 176
Copyright
Copyright © Entomological Society of Canada 1996

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