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Relative Twospotted Spider Mite Damage to Cultivars of Gossypium sp.

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Cotton cultivars were subjected to infestation by Tetranychus urticae Koch beginning at the 4-leaf stage until maturity in greenhouse experiments. Line weight was reduced in 'Deltapine 16' and 'Acala SJ-1' cult ivars and increased in Pima S-3 as a result of mite infestation. Stalk and lint weight were reduced equally in Deltapine 16 and Acala SJ-1. Fruiting efficiency based on the amount of stalk weight required to produce 1 g of lint was not affected greatly for Pima S-3 plants infested by mites. The most efficient cultivar, Deltapine 16, was the most affected. Its fruiting efficiency was reduced 21%, while that of Pima S-3 was increased.

Document Type: Research Article

Publication date: April 1, 1975

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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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