Seedling diseases are most severe when soils are cool and wet. Warmer soils produce rapid germination and vigorous early growth, usually enabling cotton seedlings to escape serious infection. It is easily identified by the brown lesions that girdle the hypocotyl near the soil line that may cause the seedling to fall over. Pythium is another common pathogen across the Cotton Belt. Although I am sure that it is present in the state, I haven't seen it and believe it to be of minor importance.
Pythium causes seed and root rots and preemergence damping off.
It is more environmentally sensitive than Rhizoctonia and probably will only be a factor in soils that are wet and during periods of prolonged cool. Also, Fusarium has been associated with seedling diseases, but it is of minor importance. However, I would probably recommend lower rather than higher rates of the fungicide. Also, given that Pythiuim is not likely to be a problem in southern Georgia, it is probably sufficient to use a product that is active only against Rhizoctonia as it is likely less expensive. Studies this season will take a closer look at seedling disease in the northern areas of the state.