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MEASURING GROWTH AND DEVELOPMENT IN POST-DIAPAUSE SPRUCE BUDWORMS (LEPIDOPTERA: TORTRICIDAE)

Published online by Cambridge University Press:  31 May 2012

D. C. Eidt  and
Margaret D. Cameron
D. C. Eidt
Affiliation:
Maritimes Forest Research Centre, Canadian Forestry Service, Fredericton, New Brunswick
Margaret D. Cameron
Affiliation:
Maritimes Forest Research Centre, Canadian Forestry Service, Fredericton, New Brunswick
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Abstract

Spruce budworm weights, either of individuals or of population averages, when related to time, provide more precise measures of development than the usually used time from hibernacula to pupation or to eclosion. For determining or predicting the development stage of field populations, average weights are a more precise alternative to time-consuming, instar determinations. Larvae feed only about 10% of the time, in darkness or light, and the pupal dry weight is 20–24% of the dry weight of artificial diet consumed. Growth curves for laboratory individuals and field populations are described.

Type
Articles
Information
The Canadian Entomologist , Volume 104 , Issue 12 , December 1972 , pp. 1901 - 1910
Copyright
Copyright © Entomological Society of Canada 1972

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References

McMorran, A. 1965. A synthetic diet for the spruce budworm, Choristoneura fumiferana (Clem.) (Lepidoptera: Tortricidae). Can. Ent. 97: 58–72.CrossRefGoogle Scholar
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Eidt, D. C. and MacGillivray, H. G.. 1972. Resistance of seven fir species to spruce budworm and other insects. Can. Forest. Serv., Bi-mon. Res. Notes 28(1): 2–3.Google Scholar