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VARIATION IN RESPONSE TO INSECTICIDES BY DOUGLAS-FIR TUSSOCK MOTH, ORGYIA PSEUDOTSUGATA (LEPIDOPTERA: LYMANTRIIDAE), POPULATIONS

Published online by Cambridge University Press:  31 May 2012

Jacqueline L. Robertson ,
Lucille M. Boelter ,
Robert M. Russell  and
N. E. Savin
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Abstract

Selected insecticides were topically applied to different populations of the Douglas-fir tussock moth, Orgyia pseudotsugata (McDunnough). For each insecticide, the hypothesis of equal response curves was rejected by the likelihood ratio test. Even for two successive generations of the same populations, the hypothesis of equality was not accepted for some insecticides. Chemical control programs directed at different populations of this insect may be adversely affected by such variations.

Type
Articles
Information
The Canadian Entomologist , Volume 110 , Issue 3 , 01 March 1978 , pp. 325 - 328
Copyright
Copyright © Entomological Society of Canada 1978

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References

Robertson, J. L. and Lyon, R. L.. 1973. Douglas-fir tussock moth: contact toxicity of 20 insecticides applied to the larvae. J. econ. Ent 66: 1255–1257.CrossRefGoogle Scholar
Russell, R. M., Savin, N. E., and Robertson, J. L.. 1977. POLO: A new computer program for probit analysis. Bull. ent. Soc. Am. 23: 209–213.Google Scholar
Savin, N. E., Robertson, J. L., and Russell, R. M.. 1977. A critical evaluation of bioassay in insecticide research: likelihood ratio tests of dose-mortality regression. Bull ent. Soc. Am. (in press).Google Scholar