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Okra- And Normal-Leaf Upland Cotton Bemisia tabaci (Homoptera: Aleyrodidae)
Colonization, 1996-2002
- Chang-Chi Chu(1), Eric T. Natwick(2), Thomas J. Henneberry(1)
- (1) USDA-ARS Western Cotton Research Laboratory, Phoenix, AZ 85040.
E-mail: cchu@wcrl.ars.usda.gov
- (2) University of California Cooperative Research and Extension, Holtville, CA 92250.
- The Third International Conference onIPM Role in Integrated Crop management and Impacts on Environment and Agricultural Products. 26-29 November 2005, Giza, Egypt.
Abstract
Smooth-leaf okra- and normal-leaf upland cottons, Gossypium hirsutum L. were compared for susceptibility to Bemisia tabaci (Gennadius) biotype B (SPW) colonization. Experiments were conducted at eight field sites at Holtville, CA and three at Maricopa, AZ, during 1996-2002. As a group, okra-leaf cottons had fewer adults, eggs, and nymphs compared with normal-leaf cottons. The results suggest a potential for okra-leaf genetic traits for reducing SPW colonization. Okra-leaf shape may also provide less favorable micro-environmental conditions for the habitat of SPW because of more open canopy and higher leaf perimeter to leaf area ratio.
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