ABSTRACT

In 2001 and 2002, trials were established on the R. Wansley farm, Elbert Co., in fields with histories of stand losses to sore shin caused by Rhizoctonia solani. At-plant fungicide treatments included Prevail (carboxin + metalaxyl + PCNB), 12 oz/cwt, and Terraclor Super X 18.8G (etridiazole +PCNB), 5.7 lb/A. Commercial seed (BXN 47) alone was the control. Seed was "hill dropped" in a randomized complete block design with five replications on 1 May 2001 and 26 Apr 2002. In 2001 and 2002, TSX 18.8G significantly increased stand (327 and 253 plants/100 ft, respectively) over the control (270 and 156 plants/100ft, respectively) and Prevail (256 and 178 plants/100 ft, respectively). TSX 18.8G also significantly lowered the skip index, a measure of the distribution of dead plants. Seed cotton yields were similar among treatments in 2001 (3200, 3238, and 3219 lb/A for TSX 18.8G, control, and Prevail, respectively) and in 2002 (836.7, 772.5, and 756.4 lb/A for TSX 18.8G, control, and Prevail, respectively).