Synanthedon canadensis: A new clearwing moth record for British Columbiawith notes on its response to pheromones (Lepidoptera : Sesiidae)

摘要

Synanthedon canadensis Duckworth and Eichlin, an attractive clearwing moth (relatively slender, wingspan of about 20-25 mm, and mostly blue-black with a prominent orange anal tuft), was originally described on the basis of two males collected in extreme southwestern Alberta (Duckworth, W. D. & T D. Eichlin. 1973. Proceedings of the Entomological Society of Washington, 75: 157). Subsequently, a female was collected in north central Utah (Eichlin, T. D. & W. D. Duckworth. 1988. The moths of America north of Mexico, fascicle 5.1). Until now, in spite of its considerable range, no further specimens of this species had turned up, and nothing is known of its biology. Two of us (RGB and BSL) are currently (1997-2000) operating a sex pheromone-based management program for control of the economically important Douglas-fir pitch moth, Synanthedon novaroensis (Henry Edwards), in Pinus contorta Douglas ex Loudon var. latifolia Engelmann (lodgepole pine) seed orchards. These orchards (and associated conifer clone banks, provenance tests, and silvicultural trials) are located at the Prince George Tree Improvement Station (PGTIS, 53.46N/122.43W) on the west bank of the Fraser River, 10 km south of Prince George, British Columbia. During the first two years of this program, we captured considerable numbers of male S. canadensis in traps baited to attract males of S. novaroensis. These are the first specimens collected in British Columbia and the only specimens to provide some information on the biology of the species.