Louisiana Cotton: Bt Resistance – How Did It Play Out Across Technologies?

By Sebe Brown, Northeast Louisiana Region Extension Entomologist

Insect pressure in Louisiana cotton has significantly increased in much of the state. For the past 3 weeks, many producers have faced a very large bollworm moth flight that has transitioned into a very large egg lay. As a result, Louisiana cotton has experienced severe worm pressure that has resulted in escapes in all commercially available Bt cotton varieties.