Abstract
Several Gossypium species and genotypes were evaluated in field and greenhouse tests in the Lower Rio Grande Valley, Texas, for preference to the whitefly, Bemisia argentifolii Bellows & Perring. Genotypes within G. hirsutum, G. barbadense, G. herbaceum , and G. arboretum were examined, including commercial and obsolete cultivars (cultivars that are no longer commercially produced), and modem and diploid genotypes. These genotypes possessed different leaf shapes, pubescence, and foliage color. Field results showed that the highest whitefly populations were on ‘Stoneville 453’ and the modem genotype 89F46h. The lowest populations were on the obsolete ‘Lone Star’ and genotypes 88G104 and ‘MACAOS’. Greenhouse choice bioassays indicated that several genotypes from G. hirsutum had lower egg or nymph numbers than ‘Deltapine 50’, including Lone Star, MACAOS, 88G104, and 89E62. Greenhouse bioassays appeared to provide information comparable to Held testing, at least for whitefly oviposition. Therefore, in preliminary screening tests where cotton seed is in short supply or certain genotypes cannot be incorporated into field testing, greenhouse bioassays can offer a complementary method.
Published Version
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