Boll set, final plant height and yield were evaluated in production cotton fields in TN, MS, AR, LA, and 71 in the years 1984-1986. Multiple applications of PIX (2.5 to 5 grms per acre applied 4 times starting at match head square) provided nearly equal height control, higher boll counts and higher yields than did the untreated cotton and the PIX plants applied at early bloom.