White mold (Sclerotinia stem rot) is caused by Sclerotinia sclerotiorum and consistently ranks in the top ten diseases plaguing global soybean crops. In 2009, United States soybean losses due to white mold reached almost 59 million bushels and cost growers a corresponding ~$560 million. One way to manage white mold is through cultivar resistance. The development of resistant varieties has proven difficult. However, poor resistance in commercial cultivars can be improved through additional breeding efforts and screening. Agronomic practices can also be used to manage white mold. Studies in Brazil have shown that narrow row spacing and high population density increases white mold disease severity...