Many private soil laboratories in Iowa and throughout the Midwest can process soil samples to determine SCN egg population densities. 

Also, samples can be sent to the Iowa State University for testing.  Mail samples to: 

Plant and Insect Diagnostic Clinic

327 Bessey Hall

Department of Plant Pathology and Microbiology

Iowa State University

Ames, IA 50011-1020

The current fee for SCN analysis at the ISU clinic is $15/sample for samples from Iowa. Call the ISU Clinic at 515-294-0581 to check about processing of soil samples from outside Iowa. Samples sent to the clinic should be accompanied by a completed Plant Nematode Sample Submission Form.