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Larch casebearer in British Columbia

By R. L. Ferris

Introduction

The larch casebearer, Coleophora lari-cella (Hubner) (Lepidoptera: Coleophoridae), was introduced to North America in 1886, and was recorded in British Columbia in 1966. The casebearer spread to this province from infestations in northern Washington, Idaho, and Montana. Large populations have caused defolia-tion resulting in noticeable discoloration in portions of the Nelson and Kamloops forest regions. Casebearer attacks western larch in a variety of stands.

For more information, see the Larch casebearer in British Columbia Forest Pest Leaflet in the Canadian Forest Service bookstore.