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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  and
J. A. Rudinsky
A. Tunnock
Affiliation:
Oregon State College, Corvallis
J. A. Rudinsky
Affiliation:
Oregon State College, Corvallis
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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
Information
The Canadian Entomologist , Volume 91 , Issue 4 , April 1959 , pp. 208 - 212
Copyright
Copyright © Entomological Society of Canada 1959

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References

1.Balch, R. E. 1952. Studies of the balsam woolly aphid, Adelges piceae (Ratz.) and its effects on balsam fir, Abies balsamea (L.) Mill. Pub. 867, Div. For. Biol., Can. Dept. Agr. 76 pp.Google Scholar
2.Eichhorn, O. 1957. Eine neue Tannenlaus der Gattung Dreyfusia (Dreyfusia merkeri nov. spec.). Zeitschr. Angew. Ent. 44: 303–348.Google Scholar
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