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Studies of Predators of the Balsam Woolly Aphid Adelges piceae (Ratz.) (Homoptera: Adelgidae): I. Field Identification of Neoleucopis obscura (Hal.), Leucopina americana (Mall.) and Cremifania nigrocellulata Cz. (Diptera, Chamaemyiidae)12

Published online by Cambridge University Press:  31 May 2012

N. R. Brown  and
R. C. Clark
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Extract

The introduction of predators of the balsam woolly aphid, Adelges piceae (Ratz.), from Europe to the Atlantic Provinces of Canada was commenced in 1933 as a joint project of the Forest Biology and Entomology Divisions of Science Service and the Commonwealth Institute of Biological Control. Several species were released between 1933 and 1941 but only one, Neoleucopis obscura (Hal.), became established and its control value was insufficient (Balch, 1952). The project was continued in 1951 and several additional species have been established. Studies of these predators and their place in the control complex in Canada were undertaken and this paper is the first in a series on the subiect. It results from the necessity of rapid field identification of the various stages of all predators found. It deals with three closely related dipterous predators, two of which were introduced, N. obscura and Cremifania nigrocellulata Cz., the other, Leucopina americana (Mall.), being native to Canada. Similar descriptions of the other species with a key will be published later.

Type
Articles
Information
The Canadian Entomologist , Volume 88 , Issue 6 , June 1956 , pp. 272 - 279
Copyright
Copyright © Entomological Society of Canada 1956

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References

Atwood, C. E. 1933. Control (of Adelges piceae) by predators. In Annual Report, Division of Forest Insects, Fredericton, N.B. (Unpublished).Google Scholar
Balch, R. E. 1952. Studies of the balsam woolly aphid, Adelges piceae (Ratz.), and its effects on balsam fir, Abies balsamea (L.) Mill. Canada, Dept. Agr. Pub. 867.Google Scholar
Delucchi, V. and Pschorn-Walcher, H.. 1954. Cremifania nigrocellulata Czerny (Diptera, ? Chamaemyiidae), ein Raüber an Drey fusta (Adelges) piceae Ratz. (Hemiptera, Adelgidae). Zeitschr. f. angew. Entomologie 36 (1): 87–107.Google Scholar
Haliday, A. H. 1833. Article XVII. Catalogue of Diptera occurring about Holywood in Downshire. The Entomological Magazine 1: 173.Google Scholar
Hardy, J. 1871–1872. Memoirs on Scottish Diptera. Leucopis obscura. Scottish Naturalist 1: 256–258.Google Scholar
Malloch, J. R. 1921. Article XIV. Forest insects in Illinois. I. The subfamily Ochthiphilinae (Diptera, Family Agromyzidae). Bull. Illinois State Nat. Hist. Survey 13: 354–355.Google Scholar
Reeks, W. A. 1943. Leucopis obscura. In Annual Report, Dominion Entomological Laboratory, Fredericton, N.B. (Unpublished).Google Scholar
Trägårdh, I. 1931. Zwei forstentomologisch wichtige Fliegen. Zeitschr. f. angew. Entomologie 18 (3): 672–690.CrossRefGoogle Scholar
Wilson, F. 1938. Notes on the insect enemies of Chermes with particular reference to Pineus pint Koch and P. strobi Hartig. Bull. Ent. Res. 29: 373–389.CrossRefGoogle Scholar