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The Biology of Adelges cooleyi (Gill.) (Homoptera: Phylloxeridae)1

  • Margaret E. P. Gumming (a1)
Extract

Adelges cooleyi (Gill.) causes galls on spruce in the forests and on shelter-belt and shade-tree plantings in Alberta. The alternate host is Douglas fir, on which the injury is less conspicuous. The tree species affected are white spruce, Picea glauca (Moench) Voss, Engelmann spruce, P. engelmanni Parry, and blue Douglas fir, Pseudotsuga menziesii (Mirb.) Franco. A. cooleyi is indigenous to North America.

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References
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12.Peterson, L. O. T., and Morton, S.. 1944. Miscellaneous studies. 2. Spruce gall aphid studies. Unpublished report. Dom. Ent. Lab. Indian Head.
13.plumb, George H. 1953. The formation and development of the Norway spruce gall caused by Adelges abietis L. Conn. Agr. Exp. Sta. Bull. 566.
14.Varty, I. W. 1956. Adelges insects of silver firs. For. Comm. Bull. 26.
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The Canadian Entomologist
  • ISSN: 0008-347X
  • EISSN: 1918-3240
  • URL: /core/journals/canadian-entomologist
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