Numbers of <i>Dendroctonus rufipennis</i> (Kirby) and <i>Thanasimus undatulus</i> Say at pheromone-baited poisoned and unpoisoned trees

Authors

  • E. D. A. Dyer Department of the Environment Canadian Forestry Service Pacific Forest Research Centre Victoria, B.C.
  • P. M. Hall Department of the Environment Canadian Forestry Service Pacific Forest Research Centre Victoria, B.C.
  • L. Safranyik Department of the Environment Canadian Forestry Service Pacific Forest Research Centre Victoria, B.C.

Keywords:

spruce beetle, <i>Dendroctonus rufipennis<i>, spruce trees, <i>Picea engelmannii</i>, <i>Picea glauca</i>, <i>Thanasimus undulatus</i>

Abstract

Four times as many spruce beetles, <i>Dendroctonus rufipennis<i> (Kirby), were killed at spruce trees (<i>Picea engelmannii</i> Parry and <i>Picea glauca</i> (Moench) Voss) baited with frontalin and sprayed with insecticide than at trees baited but unsprayed. Many clerid predators, <i>Thanasimus undulatus</i> Say, were also killed at the baited and sprayed trees. Their numbers were correlated with those of killed spruce beetles. Other correlations show that sprayed and unsprayed trees were exposed to the same attacking spruce beetle population and that predation on the spruce beetles was occurring.

References

Dyer, E.D.A. 1973. Spruce beetle aggregated by the synthetic pheromone frontalin. Can. J. For. Res. 3:486-494.

Kinzer, G.W., A.F. Fentiman, Jr., T.F. Page, Jr., R.L. Foltz, J.P. Vite, and G.B. Pitman. 1969. Bark beetle attractants; identification, synthesis and field bioassay of a new compound isolated from Dendroctonus. Nature 22 1:477-478.

Kline, L.N., R.F. Schmitz, J.A. Rudinsy, and M.M. Furniss. 1974. Repression of spruce beetle (Coleoptera) attraction by methylcyclohexenone in Idaho. Can. Ent. 106:485-491.

Rudinsky, J.A., C. Sartwell, Jr., T.M. Graves, and M.E. Morgan. 1974. Granular formulation of methylcyclohexenone: an antiaggregative pheromone of the Douglas fir and spruce bark beetles (Col., Scolytidae). Z. ang. Ent. 75:254-263.

Nijholt. W.W. 1973. The effect of male Trypodendron lineatum (Coleptera: Scolytidae) on the response of field populations to secondary attraction. Can. Ent. 105:583-590.

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Published

2019-08-28

Issue

Vol. 72 (1975): Journal of the Entomological Society of British Columbia

Section

Articles

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