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TOXICITY OF SOIL APPLICATIONS OF INSECTICIDES TO THREE SPECIES OF SPRINGTAILS (COLLEMBOLA) UNDER LABORATORY CONDITIONS1

Published online by Cambridge University Press:  31 May 2012

A. D. Tomlin
Affiliation:
Research Institute, Canada Department of Agriculture, London, Ontario

Abstract

The toxicity of a number of insecticides was tested against three species of springtails (Collembola), Folsomia candida (Willem), Onychiurus justi porteri (Denis), and Hypogastrura armata (Nicolet), which were cultured in the laboratory. Treatment was accomplished by incorporating the insecticide into moist Plainfield sand and exposing the springtails for 24 h on this substrate. Generally, the order of toxicity of the insecticides to all three species was: Counter® (phosphorodithioc acid S- (tertbutylthio) methyl O,O diethyl ester) > phorate > carbofuran > heptachlor > methomyl > chlorfenvinphos. Acephate, leptophos, p, p′-DDT, and chlordimeform were of low toxicity to all species. More significantly, however, there were large interspecific differences in susceptibility to insecticides; fensulfothion was virtually non-toxic to O. j. porteri (LD50 > 80 p.p.m.) but highly toxic to F. candida (LD50 = 0.1 p.p.m.). Results of these tests suggest that extrapolation of toxicity data from one species of springtail to other species would be unwarranted.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1975

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