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Preference of Gossypium genotypes to Bemisia argentifolii (Homoptera: Aleyrodidae)

Meagher, R.L. Jr., Smith, C.W., Smith, W.J.
Journal of economic entomology 1997 v.90 no.4 pp. 1046-1052
Gossypium hirsutum, Gossypium barbadense, Gossypium herbaceum, Gossypium arboreum, Bemisia argentifolii, cultivars, pest resistance, population density, plant morphology, trichomes, host plants, plant pests, genotype, Texas
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. arboreum were examined, including commercial and obsolete cultivars (cultivars that are no longer commercially produced), and modern 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 modern 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 field 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.