The use of atonik on the lower Texas Gulf Coast has provided lint increases from 0 to 274 lbs/A during the last 5 years. The current study evaluates two years of atonik applications made to diverse cotton varieties at the early bloom growth stage. Four rates of application were used and fiber quality analysis was examined for changes in fiber quality. Three of four 2004 tests produced lint yields of 50-94 lbs/A greater than the untreated check. Yields in 2005 were significantly greater than the untreated checks, producing 121.3 additional lint pounds/A, when applied to hail-damaged cotton. Atonik applied to cotton yielding less than 700 lbs/A was usually not successful. Lint yields greater than 900 lbs/A had profitable yield increases, although not always significant at the 5% level. These tests suggest the use of atonik may be more of a regional advantage or properly fitted to certain growing conditions and/or yield ranges. The lower Texas Gulf Coast has observed more consistent result than achieved on the Upper Gulf Coast of Texas.