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United States Department of Agriculture

Agricultural Research Service

Title: SILVERLEAF WHITEFLY POPULATIONS AND TRICHOME DENSITIES OF UPLAND COTTONS)

Author
item Chu, Chang chi
item Natwick, Eric
item Buckner, James
item Nelson, Dennis
item Freeman, Thomas
item Henneberry, Thomas

Submitted to: Sweetpotato Whitefly Progress Review Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 4/1/2002
Publication Date: 6/1/2002
Citation:

Interpretive Summary:

Technical Abstract: The study was conducted in 2000 at the University of Arizona Agricultural Research Center, at Maricopa, AZ. Cotton cultivars were five normal-leaf cotton cultivars (Deltapine [DPL] 20B, DPL 50 B, DPL 90B, NuCOTN 33B, and Stoneville [ST] 474) and four okra-leaf cultivars (E0223, E0798, E1028, and Siokra L-23). All entries were smooth leaf cultivars except for the hairy-leaf ST 474. On average, ST 474 had 71.3 stellate trichomes/cm^2 of leaf disk and other cultivars fewer than 1.0 stellate trichomes/cm2. ST 474 had 12.9 adults per leaf-turn count and other cultivars had fewer than 6.2 adults. ST 474 had 36.0 eggs/cm^2 and 13.3 nymphs/cm^2 leaf disk. Other cultivars had fewer than 15.4 eggs/cm2 and 6.0 nymphs/cm^2 leaf disk. On average of all cultivars studied, leaves on the top main stem leaf node (#1) had the highest number of stellate trichomes but the lowest numbers of eggs, nymphs and adults compared with leaves on nodes #2, #3, #4, #5 or #7.

Last Modified: 8/24/2016
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