Parasites of birch casebearer larvae in Newfoundland [Lep.: Coleophoridae] |
| |
Authors: | A G Raske |
| |
Institution: | 1. Environment Canada, Newfoundland Forest Research Centre, St. John's Newfoundland, Canada
|
| |
Abstract: | The birch casebearer,Coleophora fuscedinella Zeller, is the most important pest of white birch,Betula papyrifera Marsh, in Newfoundland. A total of 31 species of parasites and hyperparasites were reared from birch casebearer pupae in this study. An additional 7 species are known to parasitize this casebearer in Newfoundland. Only 3 species were numerous:Itoplectis quadricingulata (Provancher),Cirrospilus cinctithorax (Girault) andHabrocytus semotus (Walker). In western Newfoundland, there was an increase in percent parasitism by all parasites from 5.4% in 1973 to 7.5% in 1974 and to 16.3% in 1975. In central Newfoundland, percent parasitism was about 7% in 1974 and 1975. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|