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SCANNING ELECTRON MICROSCOPIC STUDY OF WAX DISTRIBUTION ON THE BALSAM WOOLLY APHID, ADELGES PICEAE (HOMOPTERA: ADELGIDAE)

Published online by Cambridge University Press:  31 May 2012

Arthur Retnakaran ,
Terry Ennis ,
Luc Jobin  and
Jeffrey Granett
Arthur Retnakaran
Affiliation:
Forest Pest Management Institute, Canadian Forestry Service, Sault Ste. Marie, Ontario P6A 5M7.
Terry Ennis
Affiliation:
Forest Pest Management Institute, Canadian Forestry Service, Sault Ste. Marie, Ontario P6A 5M7.
Luc Jobin
Affiliation:
Laurentian Forest Research Centre, Canadian Forestry Service, Ste. Foy, Quebec G1V 4C7.
Jeffrey Granett
Affiliation:
Department of Entomology, University of Maine, Orono, Maine 04469.
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Abstract

Scanning electron micrographs of balsam wooly aphid, Adelges piceae Ratz., show ribbon-like wax secretion in the dorso-median, marginal, and inter-tergal regions. Longitudinal grooves in the ribbons indicate that secretions from a row of cells fuse together to form bands of wax. Most of the ribbons appear as extensions of the tergal sclerites. Post-notal plates are conspicuous in the dormant first instar, and in the adults characteristic wax plates with crater-like pits are evident. The chemistry of wax in related species and a rationale for control using juvenile hormone analogs are discussed.

Résumé

Une étude au microscope électronique à balayage du Puceron lanigère du sapin, Adelges piceae Ratz., montre que la secrétion de la cire se fait en forme de ruban dans les régions médianes et marginales des terga et dans les régions intertergales. Des sillons longitudinaux dans les rubans indiquent que les sécrétions des glandes disposées en ranger se fusionnent pour former des bandes de cire. La plupart des rubans de cire semblent être des extensions des sclérites tergaux. Chez le premier stade en diapause, les plagues de cire du post-notum sont bien visible tandis que chez l'adulte elles sont caractérisées par des petites fausses en forme de cratère. L'aspect chimique de la cire chez les espèces voisines et les possibilités de lutte à l'aide de substances juvénélisantes sont discutés.

Type
Articles
Information
The Canadian Entomologist , Volume 111 , Issue 1 , January 1979 , pp. 67 - 72
Copyright
Copyright © Entomological Society of Canada 1979

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