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Observations on the Life-Cycle of the Balsam Woolly Aphid, Adelges piceae (Ratz.), in the Willamette Valley of Oregon1

Published online by Cambridge University Press:  31 May 2012

A. Tunnock
Affiliation:
Oregon State College, Corvallis
J. A. Rudinsky
Affiliation:
Oregon State College, Corvallis

Extract

The balsam woolly aphid, Adelges piceae (Ratz.) (Adelgidae, Homoptera), originally introduced from Europe, was reported on grand fir, Abies grandis (Doug.) Lindl., in the Willamette Valley by Keen (5) around 1930. Serious outbreaks of this insect were first recorded on subalpine fir, A. lasiocarpa (Hook.) Nutt., in Oregon and Pacific silver fir, A. amabilis (Doug].) Forb., in Washington in 1954 ( 3 ) . At present about 600,000 acres of subalpine and Pacific silver firs are heavily infested in the Pacific Northwest.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1959

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References

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