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THE TOXICITY OF INSECTICIDES BY CONTACT AND SOIL TREATMENT TO TWO SPECIES OF GROUND BEETLES (COLEOPTERA: CARABIDAE)1

Published online by Cambridge University Press:  31 May 2012

A. D. Tomlin
A. D. Tomlin
Affiliation:
Research Institute, Canada Department of Agriculture, University Sub Post Office, London, Ontario
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Abstract

Adults of predatory carabid beetles (Coleoptera: Carabidae) of the species Stenolophus comma Fabricius field-collected from light traps were bioassayed against several soil insecticides along with laboratory reared larvae of the predatory carabid Pterostichus melanarius Illiger. Adult S. comma beetles were exposed to serial dilutions of insecticides using a Potter spray tower; larvae of P. melanarius were exposed to insecticidally treated Plainfield sand. Fensulfothion, phorate, methomyl, carbofuran, and O,O-diethyl-S(tertbutylthio) methyl phosphorodithioate (Counter®) proved to be highly toxic to adult S. comma with a 0.01% solution causing mortalities > 65%. In the bioassay of P. melanarius larvae, Counter®, phorate, heptachlor, aldrin, and O-(2-chloro-1-(2,5-dichlorophenyl)vinyl) O-methyl ethylphosphonothioate (WL 24073) produced mortalities > 75% at 0.1 p.p.m. in Plainfield sand. The Pterostichus larvae which are probably important as predators of pest insects appear quite susceptible to several important soil insecticides. Chlorfenvinphos, leptophos, and p,p′-DDT were fairly innocuous to both adults and larvae.

Type
Articles
Information
The Canadian Entomologist , Volume 107 , Issue 5 , May 1975 , pp. 529 - 532
Copyright
Copyright © Entomological Society of Canada 1975

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