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SEASONAL ABUNDANCE OF CERTAIN SOIL ARTHROPODS IN A FENITROTHION-TREATED RED SPRUCE STAND12

Published online by Cambridge University Press:  31 May 2012

N. E. Carter  and
N. R. Brown
N. E. Carter
Affiliation:
Faculty of Forestry, University of New Brunswick, Fredericton
N. R. Brown
Affiliation:
Faculty of Forestry, University of New Brunswick, Fredericton
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Abstract

This study investigates certain arthropod predator elements of the soil fauna of a mature red spruce (Picea rubens Sarg.) stand. It presents differences between abundance 2 years prior to and 1 year after aerial spraying with fenitrothion at 2 and 3 oz per acre.

One species of centipede, one species of pseudoscorpion, and three species of harvestmen were noted in fewer numbers during the year of spraying. Higher numbers occurred the following year. Spiders of the family Erigonidae showed no marked difference in numbers during the course of the study. Most other spiders were encountered in reduced numbers during the spray year but rebounded next year.

Apparently, fenitrothion does cause temporary reduced abundance of at least some predacious arthropod components of the soil fauna. The effect of such changes in the insect community on soil processes remains unknown; even more so, the influence of repeated annual applications of fenitrothion remains undetermined.

Type
Articles
Information
The Canadian Entomologist , Volume 105 , Issue 8 , August 1973 , pp. 1065 - 1073
Copyright
Copyright © Entomological Society of Canada 1973

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