Wednesday, 20 November 2002
D0656
This presentation is part of : Display Presentations, Section F. Crop Protection Entomology
U.S. Cottonbelt Survey--1998-2002: Testing the susceptibility of the bollworm, Helicoverpa zea (Boddie), to pyrethroid insecticides
Gregory T. Payne1, Jack S. Bacheler2, Ralph D. Bagwell3, Michael L. Boyd4, Barry Freeman5, D. Ames Herbert6, Gary A. Herzog7, Don R. Johnson8, Blake Layton9, Gary L. Lentz10, B. R. Leonard11, Nannan Liu12, Scott H. Martin13, Russell Otten7, Patricia V. Pietrantonio14, Mitchell Roof15, Richard K. Sprenkel16, Scott D. Stewart10, Mike Sullivan17, John Van Duyn18, and Ron Weeks19. (1) State University of West Georgia, Biology, 1601 Maple Street, Carrollton, GA, (2) North Carolina State University, Entomology, Box 7613 Gardner Hall, Raleigh, North Carolina, (3) Louisiana State University, Entomology, Louisiana Agricultural Center, 212 Macon Ridge Rd, Winnesboro, Louisiana, (4) University of Missouri, Entomology, University of Missouri Delta Center, Highway T Box 160, Portageville, Missouri, (5) Auburn University, Department of Entomology, 301 Funchess Hall, Auburn University, AL, (6) Virginia Tech, Entomology, Tidewater Agricultural Research & Extension Center, 6321 Holland Rd, Suffolk, Virginia, (7) University of Georgia, Entomology, Coastal Plain Experiment Station, PO Box 748, Tifton, Georgia, (8) University of Arkansas, Entomology, Cooperative Extension service, 2001 Highway 70E, Lonoke, Arkansas, (9) Mississippi State University, Entomology & Plant Pathology, 103 Clay Lyle Building, Mississippi State, Mississippi, (10) University of Tennessee, Entomology, 605 Airway Blvd, Jackson, Tennessee, (11) Louisiana State University, Department of Entomology, 402 Life Science Building, Baton Rouge, LA, (12) Auburn University, Department of Entomology and Plant Pathology, 301 Funchess Hall, Auburn University, Auburn, AL, (13) Syngenta, 778 Mitcham Orchard Rd, Ruston, Louisiana, (14) Texas A&M University, Entomology, College station Rd, College Station, Texas, (15) Clemson University, Entomology & Plant Pathology, Pee Dee Research & Education Center, 2200 Pocket Rd, Florence, SC, (16) University of Florida, North Florida Research and Education Center, 155 Research Road, Quincy, FL, (17) Clemson University, Edisto Experiment Station, Blackville, SC, (18) North Carolina State University, VG James Research and Extension Center, 207 Research Station Rd, Plymouth, NC, (19) Auburn University, Entomology, Headland Area Extension Center, ALA Highway 134E, Headland, Alabama
Since 1998, IRAC-US and Cotton Incorporated have sponsored a monitoring program to assess the extent of pyrethroid resistance in bollworm populations throughout the mid-south/southeastern U.S. cotton belt. During the 2001 assessment season, the focus of the project was expanded to include evaluations of bollworm and tobacco budworm moths against both cypermethrin and spinosad. In 1998, all sites evaluated had <5% survival at the 10 µg cypermethrin/vial rate. In 1999, two sites had >10% survival at the 10 µg cypermethrin/vial rate. In 2000, five sites had >10% survival at the 10 µg cypermethrin/vial rate. In 2001, six sites had >10% survival at the 10 µg cypermethrin/vial rate. Survival of bollworm adults at a 15 µg/vial concentration of spinosad ranged from a low of 0% to a high of 57%. Tobacco budworm adults were less tolerant of spinosad treatment. Results similar to the 2001 season have been noted during the 2002 season. These data suggest that bollworm populations throughout the mid-south/southeastern U.S. are developing resistance to pyrethroid insecticides, and efforts to monitor pyrethroid resistance and the effects of spinosad in bollworm populations should remain a priority for the development and implementation of future resistance management starategies.
Species 1: Lepidoptera Noctuidae Helicoverpa zea (bollworm)
Species 2: Lepidoptera Noctuidae Heliothis virescens (tobacco budworm)
Keywords: insecticide resistance, pyrethroids
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