SCANNING ELECTRON MICROSCOPIC STUDY OF WAX DISTRIBUTION ON THE BALSAM WOOLLY APHID, ADELGES PICEAE (HOMOPTERA: ADELGIDAE)
- 1 January 1979
- journal article
- research article
- Published by Cambridge University Press (CUP) in The Canadian Entomologist
- Vol. 111 (1) , 67-72
- https://doi.org/10.4039/ent11167-1
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. 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.Keywords
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