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OCCURRENCE OF DEATHWATCH CONE BEETLE, ERNOBIUS BICOLOR WHITE (COLEOPTERA: ANOBIIDAE), IN CONES OF BLACK SPRUCE, PICEA MARIANA (MILL.) B.S.P., IN NOVA SCOTIA

  • J.D. Sweeney (a1), G. Gesner (a1) and G. Smith (a1)

Extract

An extensive survey of black spruce, Picea mariana (Mill.) B.S.P., in Newfoundland in 1978 disclosed that up to 50% of the old cones remaining on the trees were damaged by the deathwatch cone beetle, Ernobius bicolor White (Schooley 1983; White 1983). This beetle infests black spruce cones produced in the previous year's growing season and also damages cones in storage. Eggs are deposited between the scales and larvae feed within the cone and pupate in the fall or the following spring; their feeding can reduce extracted seed yields by one-half (Schooley 1983).

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References

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Brown, W.J. 1932. New species of Coleoptera III. The Canadian Entomologist 64: 312.
Schooley, H.O. 1983. A deathwatch beetle (Anobiidae: Ernobius bicolor) reduces the natural storage of black spruce seed in Newfoundland. Forestry Chronicle 59: 139142.
Schooley, H.O., Hall, J.P., and Burry, W.. 1979. Quantity of viable seed retained in old spruce cones. Environment Canada, Forestry Service Bi-monthly Research Notes 35: 32.
Snow, K. 1982. Regeneration Survey Report, 1977–1980. Nova Scotia Department of Lands and Forests, Truro, Nova Scotia.
Viereck, L.A., and Johnston, W.F.. 1990. Picea mariana (Mill.) B.S.P. Black spruce. pp. 227–237 in Burns, R.M., and Honkala, B.H. (Tech. coords.), Silvics of North America: 1. Conifers. USDA Forest Service Agriculture Handbook 654: 675 pp. Washington, DC.
White, R.E. 1983. A new species of Ernobius (Coleoptera: Anobiidae) injurious to spruce. Proceedings of the Entomological Society of Washington 85: 557559.

OCCURRENCE OF DEATHWATCH CONE BEETLE, ERNOBIUS BICOLOR WHITE (COLEOPTERA: ANOBIIDAE), IN CONES OF BLACK SPRUCE, PICEA MARIANA (MILL.) B.S.P., IN NOVA SCOTIA

  • J.D. Sweeney (a1), G. Gesner (a1) and G. Smith (a1)

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