Cotton plants were fumigated with (14)CO₂ on July 22, 1982 at the Blackland Research Center, Temple, TX. Plants were harvested at two-week intervals to follow distribution of radioactivity in roots, stems and leaves. Soil cores (6 x 36") were taken to include the root system of each plant. Each core was segmented into three 1-ft lengths and the soil was washed through a screen to collect sclerotia. Radioactivity appeared in sclerotia two-weeks following fumigation, suggesting translocation of photosynthates to old sclerotia. In a comparable greenhouse study, sclerotia were placed in nylon mesh bags and buried in soil planted to cotton. Radioactivity was found in new and old sclerotia. New sclerotia were only found in soils with dead plants and no radioactivity was found in sclerotia in nylon bags in those pots where plants failed to succumb to root rot.