United States Department of Agriculture Agricultural Research Service
 
Title: SILVERLEAF WHITEFLY POPULATIONS AND TRICHOME DENSITIES OF UPLAND COTTONS

Authors
item Chu, Chang Chi
item Natwick, Eric - UC COOP HOLTVILLE
item Buckner, James
item Nelson, Dennis
item Freeman, Thomas - NDSU, FARGO, ND
item Henneberry, Thomas

Submitted to: Sweetpotato Whitefly Progress Review Proceedings
Publication Type: Proceedings
Publication Acceptance Date: April 1, 2002
Publication Date: June 1, 2002

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: 05/25/2013