Canadian Forest Service Publications

Une ├ępizootie d'Entomophtora sp. dans une population du puceron du sapin (Cinara curvipes) (Hemiptera : Aphididae) 1973. Smirnoff, W.A.; McLeod, J.M. The Canadian Entomologist 105 : 1369-1372.

Year: 1973

Issued by: Laurentian Forestry Centre

Catalog ID: 16083

Language: French

Availability: PDF (request by e-mail)

Available from the Journal's Web site.
DOI: 10.4039/Ent1051369-10

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Abstract

An epizootic of Entomophtora sp. was observed in a population of Cinara curvipes Patch. of an exceptional density in a young stand of Abies balsamea L. (Mill.). The presence of Entomophtora and the epizootic were determined in the field by observing resting spores with a portable mini-microscope and by estimating the number of dead or liquefied aphids.

The fungus attacked most of the aphids. Among the few living females observed in October, only those that did not contain resting spores were able to reach the ground for protection. Observations conducted in the same stand the following year indicated that the epizootic of Entomophtora sp. was responsible for the reduction of C. curvipes in the observed stand.