Use of resistant soybean varieties is a very effective strategy for managing soybean cyst nematode (SCN). Numerous SCN-resistant soybean varieties are available for Iowa soybean growers. This report provides details by Iowa State University personnel who evaluate varieties each year.

Details on selecting and managing soybean cyst nematode-resistant varieties.

Previously known as PM 1649.

Download and use this form when submitting soil samples for nematode identification and counts.

This form is for soybean cyst nematode egg counts, nematodes on corn, turfgrass nematodes, nematodes found in vegetable or fruit crop fields, as well as home gardens. Also includes instructions on collecting and shipping plant and soil samples for nematode analysis at the ISU Plant and Insect Diagnostic Clinic.

As growers and those who advise them collect soil samples from fields to test for the soybean cyst nematode (SCN) and compare results from various fields and soil testing laboratories over multiple years, there are several things to consider to help interpret the soil sample results.

Soybean cyst nematode is the most economically significant pest of soybeans in Iowa and has been found in 98 of the 99 Iowa counties. Infested soybean plants often show no symptoms other than reduced yield. The 62-page field guide is designed as a resource for agronomists and farmers to manage soybean cyst nematode.

April 2008 revision of soybean cyst nematode management recommendations.