Control of Mix Populations of Bollworm and Fall Armyworm In Non-Bollgard Cotton

The objective of this study was to evaluate the efficacy of Mustang Max at 3.6 oz, Mustang Max at 2.64 oz, Karate at 5.12 oz, Holster at 5 oz, Belt at 2 oz, and Mustang Max at 2.64 oz mixed with Belt at 2 oz. for managing an acute infestation of cotton bollworms and fall armyworms in non-bollgard cotton.  Experimental design was a randomized complete block with 4 replications.  Pre-treatment counts showed no difference in total worms.  Post treatment counts were conducted at 3 days after treatment and 7 days after treatment.  There were no significant differences observed at 3 days after treatment.  However, significant differences were observed at 7 days after treatment.  Yield data will be used to further evaluate the economic impact of bollworms and fall armyworms and their management.  The field trial was conducted in Gaines County, TX in 2010 in a 120 acre center pivot irrigated field with the east half being planted in the non-bollgard cotton variety Dyna-Gro 2400RF and the west half planted in grain sorghum.