The USB refers to the soybean cyst nematode (SCN), Heterodera glycines, as the most important pathogen of soybean in the U.S. Four factors earned the SCN this title: the wide-spread incidence of SCN across all soybean production areas, the chronic persistence of SCN eggs in the soil, the absence of distinctive symptoms that alert soybean producers to take appropriate management actions, and the destructive capacity of this plant parasite. Most producers will never be able to totally eradicate SCN from infested fields, but any producer farming SCN-infested land can minimize the effect of this nematode pathogen.