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Oviposition resistance-nonpreference of boll weevils, Anthonomus grandis Grandis Boheman, was measured on day-neutral (flowering response not sensitive to daylength) lines of primitive cotton, Gossypium hirsutum L. Six of nine lines (T-109DN, T-277- 2-6DN, T-330DN, T-759DN, T-763DN, and T-790DN) had significantly less boll weevil oviposition and significantly fewer boll weevil-damaged squares than the susceptible checks, 'Stoneville 213,' and 'Deltapine 41,' or 'Deltapine 61' in both laboratory and field tests. The level of field resistance in these primitive cottons approximated that of the frego-nectariless resistant check, La.81-560FN. These primitive day-neutral-derived lines represent an important level and a previously unexploited source of resistance that can be used readily for germplasm enhancement of upland cotton. Their resistance was not attributed to any morphological trait.
Document Type: Research Article
Publication date: February 1, 1989
More about this publication?
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.