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Evaluation of Cotton Varieties for Thrips Resistance

Donald R. Johnson, Jack Reaper, III, John D. Hopkins and Gus M. Lorenz, III


ABSTRACT

Host plant resistance to thrips in cotton has the potential to reduce input costs for producers. Two trials were conducted in Keiser and Marianna, AR, to evaluate several cotton varieties for thrips resistance. Plants were observed for thrips infestation, visual damage ratings were taken early in the growing season, and yields were obtained at harvest maturity. Older varieties Coker 100A, Auburn 56, and Asiatic A1 49 exhibited resistance characteristics at both locations. DP 428 B was the only current variety to indicate resistance potential from both damage rating and yield parameters. Responses of experimental lines were not consistent across locations in this study. While the potential is present for host plant resistance, further evaluation is necessary to determine the genetic mechanisms responsible for these characteristics.





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Document last modified May 20, 2002