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PHARATE-ADULT DIAPAUSE OF BARBARA COLFAXIANA (KFT.): DIFFERENTIATION OF 1- AND 2-YEAR DORMANCY

Published online by Cambridge University Press:  31 May 2012

T.S. Sahota ,
A. Ibaraki  and
S.H. Farris
T.S. Sahota
Affiliation:
Canadian Forestry Service, Pacific Forest Research Centre, Victoria, BC, Canada V8Z 1M5
A. Ibaraki
Affiliation:
Canadian Forestry Service, Pacific Forest Research Centre, Victoria, BC, Canada V8Z 1M5
S.H. Farris
Affiliation:
Canadian Forestry Service, Pacific Forest Research Centre, Victoria, BC, Canada V8Z 1M5
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Abstract

Discovery of diapause in Barbara colfaxiana (Kft.) in the pharate-adult stage of development has allowed establishment of morphological characteristics to distinguish 1-year-diapause individuals from 2-year-diapause individuals at an earlier stage than previously possible. These morphological and some histological criteria are described. On the basis of morphological characteristics alone, 1- and 2-year-diapause individuals can be readily and reliably recognized by the unaided eye. The practical significance as well as the potential contribution of these findings to further research are pointed out.

Résumé

La découverte du phénomène de diapause chez Barbara colfaxiana (Kft.), au stade pharaté, a permis d'établir les caractéristiques morphologiques permettant de distinguer, plus tôt qu'il n'était possible, les sujets dont la diapause dure 1 an de ceux dont la diapause dure 2 ans. Ces caractéristiques morphologiques et certaines autres histologiques sont décrites. Grâce aux seules caractéristiques morphologiques, on peut distinguer ces sujets facilement et exactement, à l'oeil nu. L'importance pratique de même que 1, utilité possible de cette découverte pour la recherche sont signalées.

Type
Articles
Information
The Canadian Entomologist , Volume 117 , Issue 7 , July 1985 , pp. 873 - 876
Copyright
Copyright © Entomological Society of Canada 1985

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References

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