Target spot of soybean (caused by the fungus Corynespora cassiicola) is an emerging threat to soybean grown in the southern U.S. Until recently, target spot generally was considered a minor threat to soybean, but severe outbreaks of target spot have been observed in some soybean varieties grown in southern states over the last few years (Koenning et al. 2007). Some of the factors that have contributed towards increased severity of target spot are the release of susceptible varieties by seed companies, the development of fungicide-resistant strains of the target spot pathogen, and the lack of crop rotation in some areas. Although it is not known how or if any certain cotton production practices...