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POLLEN REMOVAL IN CYPRIPEDIUM ACAULE (ORCHIDACEAE) IN RELATION TO AERIAL FENITROTHION SPRAYING IN NEW BRUNSWICK

Published online by Cambridge University Press:  31 May 2012

R. C. Plowright ,
James D. Thomson  and
G. R. Thaler
R. C. Plowright
Affiliation:
University of Toronto, Toronto, Ontario M5S 1A1
James D. Thomson
Affiliation:
University of Toronto, Toronto, Ontario M5S 1A1
G. R. Thaler
Affiliation:
University of Toronto, Toronto, Ontario M5S 1A1
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Abstract

Measures of pollen removal in the orchid Cypripedium acaule Ait. provided a retrospective method for estimating the activity of bumble bee pollinators in New Brunswick spruce-fir forests. Significantly lowered activity was observed in fenitrothion-sprayed forest as compared with unsprayed control areas. The difference is probably attributable to direct mortality of bees in sprayed forest.

Résumé

Des mesures du prélèvement de pollen sur l’orchidée Cypripedium acaule Ait. ont été utilisées pour évaluer rétrospectivement l’activité des bourdons pollinisateurs dans des boisés d’épinette et de sapin au Nouveau-Brunswick. L’activité s’est révélée significativement moindre dans une forêt arrosée au fénitrothion que dans des boisés témoins non-anosés. La différence est probablement due à la mortalité directe des bourdons dans la forêt arrosée.

Type
Articles
Information
The Canadian Entomologist , Volume 112 , Issue 8 , 01 August 1980 , pp. 765 - 769
Copyright
Copyright © Entomological Society of Canada 1980

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