“In just the past three years, soybean cyst nematode (SCN) has spread to 55 new U.S. counties in 11 states,” says Greg Tylka, Iowa State University (ISU) nematologist and co-leader of the SCN Coalition. “The most damaging soybean pathogen, SCN has also infested 24 new counties and rural municipalities in the Canadian provinces of Manitoba, Ontario and Quebec.”
SCN keeps spreading, economic losses increasing
This map shows the distribution of SCN in counties and rural municipalities in the U.S. and Canada as of 2020. Those reported as newly infested since 2017 are shown in blue.





