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CAUSES AND ECOLOGICAL IMPLICATIONS OF EGG RETENTION IN THE GYPSY MOTH, LYMANTRIA DISPAR (L.) (LEPIDOPTERA: LYMANTRIIDAE).1

Published online by Cambridge University Press:  31 May 2012

Pedro Barbosa  and
Peter Martinat
Pedro Barbosa
Affiliation:
Department of Entomology, University of Maryland, College Park, Maryland, USA20742
Peter Martinat
Affiliation:
Department of Entomology, University of Maryland, College Park, Maryland, USA20742
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Abstract

The role of starvation, the occurrence of mating, and delays and the onset of mating on the retention of eggs by the gypsy moth, Lymantria dispar (L.), were evaluated. The mating status of female gypsy moths did influence egg retention.

Mating delays did not affect egg retention. Differences in the number of females retaining some eggs were found among females whose larvae had been reared on different host plants. The amount of food consumed had a significant effect on egg retention. Partial starvation had an impact on egg retention and on larval and pupal development, pupal size, and total egg production. The greater the starvation the greater the egg retention. The ecological implications of these results are discussed.

Résumé

On a évalué l’effet de la privation, de l’accouplement et de retards de l’accouplement sur la rétention des oeufs chez la spongieuse, Lymantria dispar (L.). Les retards de l’accouplement n’ont pas affecté la rétention des oeufs.

On a trouvé des différences dans le nombre de femelles qui retenaient des oeufs chez celles dont les larves avaient été élevées sur des plantes différentes. La quantité de nourriture a eu un effet significatif sur la rétention des oeufs. La privation partielle a affecté la rétention des oeufs, le développement larvaire et pupal, la taille des pupes, et la production totale d’oeufs. Plus la privation était grande, plus la rétention des oeufs était marquée. La signification écologique de ces résultats est commentée.

Type
Articles
Information
The Canadian Entomologist , Volume 119 , Issue 9 , September 1987 , pp. 765 - 771
Copyright
Copyright © Entomological Society of Canada 1987

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