​​Current Performance of Vip Traits in Cotton

February 2020 | 32 min., 28 sec.
by David Kerns
Texas A&M AgriLife Extension

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​Kerns addresses resistance to Bt traits with an emphasis on Vip traits in cotton. He begins by reviewing past and current Bt cotton technologies and presenting the results of surveys that assess resistance and technology efficacy. He goes on to suggest that much of the resistance is being driven by Bt corn, and he discusses types and levels of damage caused by Helicoverpa zea. Kerns also reviews data on the prevalence of H. zea resistance genes in the environment; for Vip cotton, the level of resistant alleles was only 1.2%. Based on percentage survivorship, the Vip resistance appears to be controlled by a single recessive gene. In terms of field performance, Kerns states that failures in Vip cotton technology are the exception, not the rule.

About the Presenter

David KernsDavid Kerns is a Professor in the Department of Entomology at Texas A&M University. He has an administrative role, serving as the Associate Department Head and Statewide IPM Coordinator; and a research/extension role focusing on developing IPM programs in row crops including cotton, corn, grain sorghum and soybean. David received his BS degree in entomology from Texas A&M University, a MS in entomology from Oklahoma State University and a PhD in entomology from Auburn University.​

Contact Information:
Email: dlkerns@tamu.edu


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