The western larch borer, <i>Tetropium velutinum</i> Leconte, in Interior British Columbia
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western larch borer, <i>Tetropium velutinum</i>Abstract
n the interior of British Columbia, <i>Tetropium velutinum</i> LeConte is an important borer in the sapwood of western larch, <i>Larix occidentalis</i> Nuttall. Other authors have indicated that this borer was important only as a bark miner and killer of trees. Galleries penetrated to depths of 25 to 47 mm and ranged in total length from 28 to 69 mm. At Vernon, oviposition was from early in May until the end of August. Limited observations showed that the first penetration of the sapwood by the larvae began about 6 weeks after oviposition.
References
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Kinghorn, J.M. 1954. Tetropium velutinum LeConte a secondary bark-mining cerambycid in western hemlock following the hemlock looper outbreak on Vancouver Island. Interim. Tech Rept. Canada Dept Agric. Victoria, B.C. 33 pp.
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Webb, J.L. 1911. Injuries to forests and forest products by round-headed borers. III Yearbook of US Dept. Agric. 1910. 341-358.
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