Over the last 2 years, Iowa growers have seen a rapid spread of sudden death syndrome (SDS) in some Iowa counties. SDS was first reported in 1994 in four Iowa counties. Since then the disease has been found in 31 counties. Among other measures, preventing the spread of this disease is still an effective means of controlling the disease for the majority of Iowa soybean growers. Early detection of SDS is critical to control disease spread.