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DIAPAUSE DEVELOPMENT OF SPRUCE BUDWORM LARVAE, CHORISTONEURA FUMIFERANA (CLEM.) (LEPIDOPTERA: TORTRICIDAE), AT TEMPERATURES FAVOURING POST-DIAPAUSE DEVELOPMENT

Published online by Cambridge University Press:  31 May 2012

Er-Ning Han  and
Eric Bauce
Er-Ning Han
Affiliation:
Faculté de foresterie et de Géomatique, C.R.B.F., Université Laval, Ste-Foy, Québec, Canada G1K 7P4
Eric Bauce
Affiliation:
Faculté de foresterie et de Géomatique, C.R.B.F., Université Laval, Ste-Foy, Québec, Canada G1K 7P4
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Requirements for diapause development of larvae of Choristoneura fumiferana have been generally believed to be met by temperatures of 2°C or below for a period ranging from 14 to 20 weeks (see review by Sanders 1991), whereas those favourable for post-diapause development were shown to be above 11°C (Régnière 1990). However, we noticed that a large number of larvae completed diapause after 10 weeks at 18°C without any cold storage. The following experiment was carried out to confirm this result.

Type
Articles
Information
The Canadian Entomologist , Volume 128 , Issue 1 , February 1996 , pp. 167 - 169
Copyright
Copyright © Entomological Society of Canada 1996

References

Han, E.-N., and Bauce, E.. 1993. Physiological changes and cold hardiness of spruce budworm larvae, Choristoneura fumiferana (Clem.), during pre-diapause and diapause development under laboratory conditions. The Canadian Entomologist 125: 1043–1053.CrossRefGoogle Scholar
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