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.
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