Susceptibility of Three Coniferophagous Choristoneura Species (Lepidoptera: Tortricidae) to Bacillus thuringiensis var kurstaki

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Susceptibility of three Choristoneura species to the HD-1 and NRD-12 strains of Bacillus thuringiensis var. kurstaki Berliner was compared using the diet-incorporation method. Susceptibility of C. fumiferana (Clemens) and C. pinus Freeman did not differ significantly, whereas C. occidentalis Freeman was significantly more susceptible to preparations produced in our laboratory and commercial formulations. There was no significant difference between pathogenicity of HD-1 and NRD-12 for any of the budworm species. That C. occidentalis was more susceptible than C. fumiferana also was demonstrated in assays with treated foliage of balsam fir, Abies balsamea L., using spray deposits that are representative of ultra-low-volume applications.

Document Type: Research Article

Publication date: February 1, 1989

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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