Factors Associated with Insect Resistance in Sweetpotatoes1

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An unidentified factor in the root periderm of some sweet potatoes was an effective deterrent to injury by wireworms (Conoderus spp.) , by Diabrotica spp., and by larvae of Systena elongata (F.). The presence of larval antibiotic or non preference factors in the inner portion of some roots was demonstrated, but these were not clearly related to resistance. The amount of injury by these insects as well as by the sweet potato flea beetle Chaetocnema confinis Crotch, and by a grub, Plectris aliena Chapin, was influenced only slightly, if at all, by the time and depth of root enlargement, by the sugar, carotene, and dry matter content, by latex flow, or by the flesh pH.

Document Type: Research Article

Publication date: June 1, 1971

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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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