Recent Evaluations of Bt and Non-Bt Cotton in the Mississippi Delta

Bt (both Bollgard II and Widestrike) and non-Bt cotton varieties were planted in small plots within producer fields across multiple locations in the MS Delta during 2011-2013.  Plots were sampled twice weekly and treated with either Prevathon or Karate insecticides when bollworms reached treatment-level populations as recommended by the MS Insect Control Guide.  A portion of the plot was also left untreated.  The number of applications triggered at each location and the resulting yields and overall returns over costs at the various locations will be reported.