TOXICOLOGICAL AND ELECTROPHORETIC POPULATION CHARACTERISTICS OF WESTERN SPRUCE BUDWORM, CHORISTONEURA OCCIDENTALIS (LEPIDOPTERA: TORTRICIDAE)

Author:

Robertson J. L.,Stock M. W.

Abstract

AbstractThe responses of 11 population samples of sixth-instar larvae of the western spruce budworm, Choristoneura occidentalis Freeman, to carbaryl spray were determined. Representatives of one population each from Arizona, Idaho, Montana, New Mexico, and Washington were included. Five response levels of progressively higher tolerance were apparent; the most tolerant population sample was ca. 18 times more tolerant than the most susceptible sample to carbaryl. Trends in relationships of site characteristics and response to carbaryl were not evident. Previous spray history of an area, however, appeared to be related to response at a site; populations from sites sprayed with DDT were significantly more tolerant than those from sites where DDT had not been used. The most tolerant groups were collected from a Montana population in an area where both DDT and carbaryl had been applied. The electrophoretic characteristics of each population sample were determined. No loci detectable by electrophoresis were correlated with response to carbaryl.

Publisher

Cambridge University Press (CUP)

Subject

Insect Science,Molecular Biology,Physiology,Ecology, Evolution, Behavior and Systematics,Structural Biology

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