ESA Annual Meetings Online Program

Susceptibility of field populations of fall armyworm from United States and Puerto Rico to purified Cry1F protein

Wednesday, November 14, 2012
Exhibit Hall A, Floor One (Knoxville Convention Center)
Ying Niu , Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA
Robert L. Meagher , Behavioral and Biological Control Unit, USDA, Agricultural Research Service, Center for Medical, Agricultural & Veterinary Entomology (CMAVE), Gainesville, FL
Fei Yang , Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA
Jawwad A. Qureshi , Department of Entomology, Southwest Florida Research and Education Center, Immokalee, FL
B. Rogers Leonard , Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA
Fangneng Huang , Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA
Susceptibility of two field populations of the fall armyworm, Spodoptera frugiperda (J.E. Smith), collected from Florida and Puerto Rico to the purified Cry1F protein was evaluated in the laboratory. Diet- incorporation bioassays showed that the Florida population was susceptible to the purified Cry1F protein with a LC50 value of 0.23 ug/g, while the Puerto Rico population was >137-fold resistance to the purified Cry1F protein.

Key words: Cry1F, Bt resistance, Spodoptera frugiperda

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