Pathogens survive between planting seasons on plant debris. Deep plowing will physically remove debris from the plant and also hastens decay. As the debris decays, the pathogens will die out. Plant resistance is the most efficient and least expensive management practice. However, resistance to all known diseases is not available, and resistance may not last forever.
Pathogens sometimes develop new races which overcome plant resistance.
Although several effective nematicides are available for soybeans, their cost often makes them prohibitive. Apply at proper rates and follow label instructions. When disease pressure is high, fungicides are effective and profitable. Benefits include increased yield and improved seed quality. Apply at proper times and rates following label instructions.