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FLIGHT ACTIVITY OF FEMALE EASTERN SPRUCE BUDWORM (LEPIDOPTERA: TORTRICIDAE) AT CONSTANT TEMPERATURES IN THE LABORATORY

Published online by Cambridge University Press:  31 May 2012

C. J. Sanders ,
D. R. Wallace  and
G. S. Lucuik
C. J. Sanders
Affiliation:
Canadian Forestry Service, Great Lakes Forest Research Centre, Sault Ste. Marie, Ontario P6A 5M7
D. R. Wallace
Affiliation:
Canadian Forestry Service, Great Lakes Forest Research Centre, Sault Ste. Marie, Ontario P6A 5M7
G. S. Lucuik
Affiliation:
Canadian Forestry Service, Great Lakes Forest Research Centre, Sault Ste. Marie, Ontario P6A 5M7
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Abstract

Female budworm flight activity was monitored automatically at seven constant temperatures ranging from 10° to 25°C. Flight activity was negligible below 17.5°C, but considerable oviposition occurred as low as 15°C. It is therefore possible that during cool weather the number of insects dispersing is reduced, with the result that a larger proportion of the eggs are laid in the stand of origin.

Résumé

Les vols de papillons femelles de la Tordeuse des bourgeons de l’Epinette furent suivis de près automatiquement à sept températures constantes variant de 10° à 25°C. Les vols furent négligeables en dessous de 17.5°C, mais d’importantes pontes d’oeufs se produisirent à une température aussi basse que 15°C. Il est donc possible que lorsque la température est fraîche, le nombre d’insectes dispersés soit réduit, ce qui aboutit à une plus forte proportion d’oeufs pondus dans le peuplement d’origine.

Type
Articles
Information
The Canadian Entomologist , Volume 110 , Issue 6 , 01 June 1978 , pp. 627 - 632
Copyright
Copyright © Entomological Society of Canada 1978

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