Southwestern Entomologist (2000) 25, 237-242

C.C. Chu, T.P. Freeman, J.S. Buckner, E.T. Natwick, T.J. Henneberry and D.R. Nelson (2000)
Silverleaf whitefly colonization and trichome density relationship on upland cotton cultivars
Southwestern Entomologist 25 (4), 237-242
Abstract: We conducted studies to determine if morphological leaf surface features of cotton, Gossypium hirsutum L., are related to host plant resistance traits to silverleaf whiteflies, Bemisia argentifolii Bellows and Perring. Cotton cultivar Stoneville 474 had higher numbers of silverleaf whitefly eggs, nymphs, and adults and also had higher numbers of stellate trichomes on abaxial leaf surfaces compared with nine other upland cotton cultivars tested. The five smooth, okra-leaf cotton cultivars as a group had similar numbers of whitefly eggs (25) and nymphs (10) per cm² of leaf disk but fewer adults (12) per leaf compared with four smooth, normal-leaf cotton cultivars. The top young leaves on the main stem terminals of smooth normal- or okra-leaf cultivars had significantly higher numbers of stellate trichomes (174) per cm² of leaf disk compared with older leaves. However, the top young leaves on main stem leaf nodes #1 also had reduced numbers of eggs (23) and nymphs (1) per cm² of leaf disk compared with older leaves (17-81 and 14-26, respectively). Results suggest that other factors, in addition to leaf hairiness, at least for young terminal leaves, affect silverleaf whitefly populations.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Chang Chi Chu, Eric T. Natwick

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Bemisia tabaci biotype MEAM1	Cotton (Gossypium)