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SHORT- AND LONG-TERM EFFECTS OF FOREST SPRAYING OF CARBARYL (SEVIN-4-OIL®) ON STREAM INVERTEBRATES1

Published online by Cambridge University Press:  31 May 2012

David L. Courtemanch  and
K. Elizabeth Gibbs
David L. Courtemanch
Affiliation:
Department of Entomology, University of Maine at Orono 04469
K. Elizabeth Gibbs
Affiliation:
Department of Entomology, University of Maine at Orono 04469
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Abstract

The effect on stream invertebrates of carbaryl (Sevin-4-oil®) applied at a rate of 840 g A.I./ha for spruce budworm suppression in Maine was studied. Three streams in each of three different treatment areas were monitored: streams in areas sprayed with carbaryl for the first time, streams in areas sprayed 2 consecutive years, and streams in unsprayed areas.

Initial postspray response was an increase in drift up to 170× in treated streams. Benthos samples showed significant declines among Plecoptera, Ephemeroptera, and Trichoptera on subsequent sampling dates. Plecoptera did not repopulate any treated stream by 60 days after treatment. Streams treated for the second consecutive year had very low prespray Plecoptera populations compared with those unexposed to carbaryl. Diptera, with the exception of Microtendipes, and Oligochaeta were unaffected.

Type
Articles
Information
The Canadian Entomologist , Volume 112 , Issue 3 , 01 March 1980 , pp. 271 - 276
Copyright
Copyright © Entomological Society of Canada 1980

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