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LIFE HISTORY AND HABITS OF A LEAF MINER, CAMERARIA MACROCARPAE, ON BUR OAK IN MANITOBA (LEPIDOPTERA: GRACILLARIIDAE)

Published online by Cambridge University Press:  31 May 2012

G. N. Still
Affiliation:
Northern Forest Research Centre, Canadian Forestry Service, Edmonton, Alberta
H. R. Wong
Affiliation:
Northern Forest Research Centre, Canadian Forestry Service, Edmonton, Alberta

Abstract

Cameraria macrocarpae Freeman is a univoltine blotch miner which feeds on the palisade parenchyma of bur oak leaves. The larvae have two morphologically distinct forms and seven instars. It overwinters in the sixth instar, inside the mined leaf. Females deposit their eggs in rows, usually beside the mid-rib, and the larvae enter the leaf directly under the chorion. The larvae from each egg cluster form a common mine on the upper surface of the leaf. The mines of C. macrocarpae are brownish and each contains several larvae, differing from the whitish mines of Cameraria hamadryadella (Clemens), each containing a single larva. Nine species of parasites are listed.

Résumé

Cameraria macrocarpae Freeman est une mineuse univoltine qui se nourrit du tissu palissadique des feuilles du Chêne à gros glands. Ses larves revêtent deux aspects morphologiques distincts en sept phases de développement. L’insecte passe l’hiver au sixième âge larvaire, à l’intérieur de la feuille minée. Les femelles déposent leurs oeufs en rangées, ordinairement à côté de la nervure médiane d’où les larves pénètrent dans la feuille directement sous le chorion. Les larves issues d’une même grappe d’oeufs construisent une mine à la face supérieure de la feuille. Les mines de C. macrocarpae sont de couleur brunâtre et contiennent chacune plusieurs larves à la différence de celles de Cameraria hamadryadella (Clemens), qui sont blanchâtres et ne contiennent qu’une seule larve chacune. Liste de neuf espèces parasitaires.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1973

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References

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