As of October 1, 1998, there is a price discount for multiple soil samples submitted to the ISU Plant Disease Clinic  (515-294-1160) for analysis for the soybean cyst nematode (SCN). The cost for processing five samples or fewer will remain at $15 per sample. The new processing prices for six to 10 samples is $12 per sample; analysis of 11 or more samples costs $10 per sample.
The recommended time to collect soil samples to test for SCN is in the fall, following harvest of corn and soybeans. Fall sampling for SCN provides growers with results that they can use in next year's planting decisions. Soil samples submitted to ISU for SCN testing should be accompanied by a completed Plant Nematode Sample Submission Form (ISU Extension publication PD-32). This form is available as a PDF file . The form also is available for free at any county extension office  or by calling the ISU Extension Distribution Center  at 515-294-5247.
The address of the ISU Plant Disease Clinic is 323 Bessey Hall, Department of Plant Pathology, Iowa State University, Ames, IA 50011-1020. Growers can obtain information about the biology and management of SCN, and about testing soil for SCN by calling toll-free 1-877-SCN-TEST (1-877-726-8378).
This article originally appeared on pages 182-183 of the IC-480(23) -- October 12, 1998 issue.