By Dusty Sonnenberg, CCA, Ohio Field Leader, a project of the Ohio Soybean Council and soybean check-off.“Soybean Cyst Nematode (SCN) is the most important nematode in soybeans because it causes the most damage. It is the number one yield robbing soybean pathogen in North America,” said Marisol Quintanilla, Michigan State University Extension Nematologist.