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THE EFFECT OF TEMPERATURE AND FOOD DEPRIVATION ON SURVIVAL OF FIRST-INSTAR DOUGLAS-FIR TUSSOCK MOTHS (ORGYIA PSEUDOTSUGATA) (LEPIDOPTERA: LYMANTRIIDAE)

Published online by Cambridge University Press:  31 May 2012

Roy C. Beckwith
Roy C. Beckwith
Affiliation:
USDA Forest Service, Pacific Northwest Forest and Range Experiment Station, Foresuy Sciences Laboratory, Corvallis, Oregon 97331
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Abstract

Mortality of neonatal Douglas-fir tussock moth larvae varied from 0% to 100% depending on the rearing temperature and duration of food deprivation. Lower temperatures apparently favor larval survival under starvation conditions. For each period of food deprivation, mortality occurs earlier as the temperature increases; this shift to earlier mortality was significant at P <.01. Some implications are discussed.

Résumé

La mortalité chez des larves nouvellement écloses de la chenille à houppes du Douglas a varié de 0 à 100% dépendant de la température d'élevage et de la durée du jeûne. Les basses températures ont semblé favoriser la survie pour les larves privées de nourriture. Pour les différentes durées de jeûne testées, la mortalité est survenue plus tôt à mesure qu'augmentait la température, cette tendance étant significative à P <.01. La discussion porte sur certaines implications de ces observations.

Type
Articles
Information
The Canadian Entomologist , Volume 115 , Issue 6 , June 1983 , pp. 663 - 666
Copyright
Copyright © Entomological Society of Canada 1983

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