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Susceptibility of Normal-Leaf and Okra-Leaf Shape Cottons to Silverleaf Whitelies and Relationships to Trichome Densities

C. C. Chu, E. T. Natwick and T. J. Henneberry


 
ABSTRACT

Stoneville 474 supported higher numbers of silverleaf whitefly eggs, nymphs and adults and also had higher numbers of trichomes on underleaf surfaces of leaves compared with the nine other upland cotton cultivars tested. The five smooth, okra-leaf cotton cultivars as a group had similar numbers of whitefly eggs and nymphs compared with the four smooth, normal-leaf cotton cultivars. The top young leaf on the main stem terminals had significantly higher numbers of trichomes compared with older leaves. However, the top young leaf had fewer whitefly numbers compared with older leaves.



Reprinted from Proceedings of the 2000 Beltwide Cotton Conferences pp. 1157 - 1158
©National Cotton Council, Memphis TN

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Document last modified Saturday, Jun 17 2000