12: Mechanism of resistance to Vip3Aa in fall armyworm (Spodoptera frugiperda) populations from Louisiana and Texas

Thursday, November 19, 2020

12:30 PM - 12:45 PM EST

Presenting Author(s)

Heba Mohamed Yassen Abdelgaffar, PhD

Knoxville, TN

Co-Author(s)

FY

Fei Yang

Texas A&M University
College Station, Texas
David L. Kerns

Texas A&M University
College Station, Texas
Fangneng Huang

Baton Rouge, LA
GH

Graham P. Head

Bayer U.S. - Crop Science
Chesterfield, Missouri
Juan Luis Jurat-Fuentes

University of Tennessee
Knoxville, Tennessee

Larvae of the fall armyworm (Spodoptera frugiperda) are one of the most relevant pests of food and fiber staple crops, including maize, rice, cotton, sorghum, and vegetables. During the last decade, transgenic maize producing Cry and Vip3A insecticidal proteins from the bacterium Bacillus thuringiensis (Bt crops) has provided effective control of S. frugiperda in the Western Hemisphere. The biggest threat to the sustainability of Bt maize is the evolution of resistance to Cry and Vip3A toxins in S. frugiperda populations. In this presentation, we will share data on the identification of the resistance mechanism to Vip3Aa in field-isolated populations of S. frugiperda from Louisiana and Texas. This information is critical to assess current resistance management approaches, design of improved insecticidal proteins, and develop DNA-based technologies for resistance monitoring.