Investigator: Gregory L. Tylka, David Soh
Funding: Iowa Soybean Association
SCN was first discovered in Iowa in Winnebago County, in extreme north central Iowa, in 1978. Currently, the nematode is known to exist in 97 of 99 Iowa counties (all except Allamakee and Ida Counties). A random survey of Iowa was conducted in 1995-1996 to better define the distribution of SCN in the state. SCN was found in 74% of Iowa fields sampled in that survey. SCN was found much less frequently in no-till fields than in tilled fields sampled in the survey.