|Chu, Chang Chi|
|Natwick, Eric - UNIV OF CA EXTENSION|
Submitted to: Sweetpotato Whitefly Progress Review Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: May 1, 1997
Publication Date: N/A
Technical Abstract: Five and nine upland cotton cultivars were evaluated for susceptibility to silverleaf whiteflies under low desert growing conditions in Imperial Valley, CA in 1994 and 1995, respectively. Results showed that all cultivars were susceptible to whitefly colonization. Cotton lint from all cultivars was sticky and yields were low when whiteflies were not controlled. When whiteflies were controlled initiating treatments at a threshold of 4.1 adults/leaf, DPL 50 and 5415 required 4 applications of insecticides while other cultivars required from 5 to 7 applications during the season. Results indicate that selection of cultivars that are less susceptible to whiteflies can reduce insecticide application and cost of cotton production.