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THE POPLAR-AND-WILLOW BORER, STERNOCHETUS (= CRYPTORHYNCHUS) LAPATHI (COLEOPTERA: CURCULIONIDAE), IN BRITISH COLUMBIA1

Published online by Cambridge University Press:  31 May 2012

John W. E. Harris
Affiliation:
Forest Research Laboratory, Department of Forestry and Rural Development, Victoria, British Columbia
Harry C. Coppel
Affiliation:
Department of Entomology, University of Wisconsin, Madison, Wisconsin

Abstract

A study was made of the poplar-and-willow borer, Sternochetus (= Cryptorhynchus) lapathi (L.) (Coleoptera: Curculionidae), in British Columbia between 1959 and 1964. The borer occurred principally south of 52 degrees north latitude. Willows were the preferred hosts. Ornamentals, hybrids in commercial plantings, and natural growing trees were attacked. The life cycle of the insect on southern Vancouver Island lasted up to 3 years; overwintering took place in early instar and adult stages. Eggs were laid in the bark; larvae mined first in the bark and then in the wood, where pupation took place. Few parasites and predators were found. DDT, dieldrin, and BHC killed adults; lindane (0.5% water emulsion), applied in the spring, caused larval mortality up to 96%.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1967

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