We compared smooth-leaf okra- and normal-leaf upland cotton (Gossypium hirsutum L.) strains and cultivars for susceptibility to colonization by Bemisia tabaci (Gennadius) biotype B. Experiments were conducted at seven field sites, five at Holtville, CA, and two at Maricopa, AZ, during 1996–2000. Okra-leaf strains and cultivars, as a group, had lower numbers of adults, eggs, and nymphs compared with normal-leaf strains and cultivars indicating the potential of okra-leaf genetic traits for reducing colonization by B. tabaci. Results also suggest that okra-leaf shape may provide less favorable micro-environmental conditions for the habitat of B. tabaci because of more open canopy as evidenced by higher leaf perimeter to leaf area ratio. The okra-leaf cultivar ‘Siokra L-23’ appears to have genetic traits that should be examined further as a source of B. tabaci resistance.
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1 August 2002
Bemisia tabaci (Homoptera: Aleyrodidae) Biotype B Colonization on Okra- and Normal-Leaf Upland Cotton Strains and Cultivars
Chang-Chi Chu,
Eric T. Natwick,
Thomas J. Henneberry
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Journal of Economic Entomology
Vol. 95 • No. 4
August 2002
Vol. 95 • No. 4
August 2002
Bemisia argentifolii
Bemisia tabaci biotype B
cotton
host plant resistance
normal-leaf
okra-leaf