National Cotton Council of America
Beltwide Cotton Conferences
January 8-11, 2008
Gaylord Opryland Resort and Convention Center
Nashville, Tennessee
The Cotton Foundation

Recorded Presentations

Friday, January 11, 2008 - 8:15 AM

Adult Vial Tests of Southwestern Pink Bollworm Reveal Strong Resistance to Chlorpyrifos

Timothy J. Dennehy1, Gopalan C. Unnithan1, Virginia S. Harpold1, Larry Antilla2, and Mike Whitlow2. (1) University of Arizona, Department of Entomology, Tucson, AZ 85721, (2) Arizona Cotton Research & Protection Council, 3721 E. Wier Avenue, Phoenix, AZ 85040-2933

Adult vial bioassays were conducted to estimate pink bollworm susceptibility to four insecticides: chlorpyrifos, oxamyl, profenofos, and λ-cyhalothrin.  Tests were conducted on 15 laboratory-reared strains collected in 2006 from Arizona and the Imperial and Palo Verde Valleys of California.  Results revealed very strikingly high levels of resistance to chlorpyrifos as well as moderately reduced susceptibility to the other insecticides in some strains. 

See more of Cotton Insect Research and Control - Friday Morning - Session B
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See more of The Beltwide Cotton Conferences, Jan. 8-11 2008