Canadian Forest Service Publications

Variation in Elatobium abietinum attack on Picea glauca and its relation to Pissodes strobi resistance. 1999. Lewis, K.G.; Alfaro, R.I.; Andrucko, D. Scandinavian Journal of Forest Research 14: 334-340.

Year: 1999

Available from: Pacific Forestry Centre

Catalog ID: 5321

Language: English

CFS Availability: Order paper copy (free)

Abstract

White spruce (Picea glauca (Moench) Voss) is host to several pests, including the white pine weevil (Pissodes strobi (Peck)) and the green spruce aphid (Elatobium abietinum (Walker)). The larvae of the white pine weevil damage spruce leaders by consuming the cortex while the green spruce aphid is a defoliator. White spruce emblings (seedlings produced by culturing tissues from seed embryos) from 18 families previously ranked for resistance to the white pine weevil were defoliated to varying degrees by the green spruce aphid in a natural outbreak that developed within a holding shadehouse. A strong relationship was shown between damage caused by the aphids and weevil resistance. Emblings ranked as highly weevil-resistant sustained significantly less aphid defoliation.

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