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Evaluation of Foreign and Domestic Cotton Cultivars and Strains for Boll Weevil Resistance¹

Forty-four domestic and introduced cotton (Gossypium hirsutum L.) cultivars and strains were evaluated in the laboratory for resistance to the boll weevil, Anthonomus grandis Boh. Opposition by the boll weevil was significantly lower in squares (flower buds) from eight cottons (‘Lasani 11,’ ‘AC 134,’ ‘Albar 627,’ G077-2, ‘BP 52/NC 63,’ TX-LY-18-72, DES-HJERB 16, and DES-ARB 16) than in squares from the commercial cultivar, ‘Deltapine 16.’ Five of the eight were introductions. Oviposition was not significantly lower in any entry than in ‘Stoneville 213,’ another commercial cultivar. There was no significant correlation between terpenoid aldehyde content in squares of 10 entries and rate of oviposition. The potential of the entries in breeding for increased resistance to boll weevil is discussed.

Key Words: Anthonomus grandis Boh. • Gossypium hirsutum L. • Oviposition susppression • Terpene content

² Former graduate research assistant, now research entomologist, AR, SEA, USDA, Delta States Res. Center, Stoneville, MS 38776.

³ Research geneticist, research entomologist, and research agronomist, respectively, AR, SEA, USDA, Crop Sci. and Eng Res. Lab., Mississippi State, MS 39762.

Received for publication May 4, 1979.