Taxonomic Studies on the Acleris gloverana-variana Complex, the Black-headed Budworms (Lepidoptera: Tortricidae)

The black-headed budworm has long been known as an endemic resident and occasional epidemic defoliator of coniferous forests in Canada and parts of northern United States. The moth is distributed across the whole of the northern forest area from Cape Breton Island to the west coast of Canada and Ala...

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Bibliographic Details
Published in:The Canadian Entomologist
Main Author: Powell, Jerry A.
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 1962
Subjects:
Online Access:http://dx.doi.org/10.4039/ent94833-8
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0008347X00075878
Description
Summary:The black-headed budworm has long been known as an endemic resident and occasional epidemic defoliator of coniferous forests in Canada and parts of northern United States. The moth is distributed across the whole of the northern forest area from Cape Breton Island to the west coast of Canada and Alaska. It is a serious and recurrent defoliator particularly in British Columbia and Washington (Silver, 1960). The larvae feed on various conifers of the genera Abies, Larix, Picea, Pseudotsuga , and Tsuga , and different hosts are preferred in different parts of the range. Thus, Schaffner (1950) gives Abies balsamea as the most important host in eastern areas, Raizenne (1952) indicates that species of spruce ( Picea ) are most often utilized in southern Ontario, while Tsuga heterophylla has been found to be preferred in coastal British Columbia (Leech, 1933; Keen, 1952; Evans and Silver, 1954; Silver, 1960).