The Canadian Entomologist (1999) 131, 107-113

L. Safranyik and D.A. Linton (1999)
Spruce beetle (Coleoptera : Scolytidae) survival in stumps and windfall
The Canadian Entomologist 131 (1), 107-113
Abstract: Survival of the spruce beetle, Dendroctonus rufipennis Kirby, from egg to adult, proportion of 1- and 2-year-cycle adults, and egg and egg gallery production per attack were investigated over five generations in stumps and windfall in central British Columbia. Densities of attacks, egg gallery lengths, and brood in various stages of development were obtained by repeated sampling throughout the life cycle. Spruce beetle populations remained at suboutbreak levels throughout the duration of the study. There were generally no differences by area, host type, or infestation year in any of the measured variables. The mean numbers (±SD) of eggs per attack and eggs per centimetre of egg gallery were 80.8 (54.3) and 5.4 (4.6), respectively. Brood survival from egg to adult averaged 6.8%. The lowest and highest survival from egg to adult occurred in the same years as when the lowest and highest percentage of 1-year-cycle adults were produced, respectively. On average, 51.8% of the beetles in stumps and 19.1% of beetles in windfall developed on a 1-year cycle.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): L. Safranyik

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.
	Dendroctonus rufipennis	Spruce (Picea)