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Comparison of Methyl Bromide LD50s of Codling Moth (Lepidoptera: Tortricidae) on Nectarine Cultivars as Related to Natural Variation

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Responses of codling moth (cydia pomonela L.) fumigated with methyl bromide on 9 nectarine, prunuspersico (L.) Batsch variety nucipersico Schneid., cultivars indicated no significant differences in relative toxicity at LD50s based on response ratios and their respective 95% CL. Previous significant differences among the cultivars based on failure of 95%CLs of LD50s to overlap may reflect natural variation rather than differences in insect response among the cultivars. We conclude that, for quarantine purposes, varietal testing cannot provide definitive conclusions regarding differences in insect response on cultivars unless the influence of natural variation on test results is evaluated.

Document Type: Research Article

Publication date: December 1, 1998

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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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