Soybean cyst nematode (SCN) is a major yield-limiting factor of soybean. This nematode disease has spread to at least 12 soybean-producing counties in North Dakota. Cultivar resistance is the primary nematode management tactic. SCN is known to be genetically diverse nematode populations and can develop new virulent forms over time due to continuous use of the same sources of resistance. Monitoring virulence changing of SCN populations across the state is important to navigate the use of resistance sources for growers and the new resistance sources that should be introduced to ND. Knowledge of virulence types within the state should greatly influence the choice of populations and HG...
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