Environmental Entomology (1982) 11, 493-496

Nancy Lorimer (1982)
Morphological variation by population, host, and sex in spruce budworm
Environmental Entomology 11 (2), 493-496
Abstract: Late-instar spruce budworm larvae were collected from two host tree species, balsam fir and white spruce, and scored for head and thoracic shield pigmentation. In some populations, caterpillar pigmentation frequencies differed significantly by host species. In all collections, male larvae were significantly different from female larvae. Frequency distributions were also different from population to population.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Choristoneura fumiferana	Spruce (Picea)	U.S.A. (mid N)
	Choristoneura fumiferana	Fir (Abies)	U.S.A. (NE)