The balsam woolly aphid, Adelges piceae (Ratz.), is an introduced pest of European origin. It was discovered in Maine and New Hampshire in 1908, in Nova Scotia in 1929, and in Newfoundland in 1949 (Balch, 1952). True firs, Abies spp., are the only hosts of the aphid which causes severe damage to balsam fir, A. balsamea (L.) Mill., the predominant fir species in the Atlantic Provinces. Severe damage is caused by high numbers of aphids feeding in the crowns and on the stems of trees. In Newfoundland, rapid deterioration of tree crowns predominates; stem attack occurs infrequently and in widely dispersed spots (Carroll and Bryant, 1960). The infested area in the Province bas increased from 300 square miles in 1949 to over 3500 square miles in 1962.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.115370 |
| Date | January 1964 |
| Creators | Bryant, David. G. |
| Contributors | Morrison, F. (Supervisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science. (Department of Biology.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: NNNNNNNNN, Theses scanned by McGill Library. |
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