Database Research Summaries
Improving SCN Management through Field Research on SCN resistant soybean varieties and nematode protectant seed

calendar_today Year of Research: 2018
update Posted On: 05/23/2019
group Gregory Tylka (Principal Investigator, Iowa State University)
bookmark Iowa Soybean Association

Research Focus

The focus of this project is to increase the competitiveness of Iowa soybean farmers through better and more sustained management of SCN.


  • The agronomic performance and nematode control provided by SCN-resistant soybean varieties being marketed to Iowa soybean farmers.
  • The effects of increasing SCN reproduction on yields of SCN-resistant soybean varieties.
  • The effects of nematode-protectant seed treatments on agronomic performance and reproduction of SCN on resistant soybean varieties.


  1. A comprehensive list of SCN-resistant soybean varieties was compiled and created.
  2. Field experiments were conducted to evaluate the potential management benefits of nearly 200 SCN-resistant soybean varieties and three different nematode-protectant seed treatments in a total of 36 experiments conducted in the 9 crop reporting districts of Iowa.
  3. Results of the field experiments were published in an extension report and in a refereed paper in a scientific journal.


  • Soybean cyst nematode is Iowa’s most damaging pathogen and is found in over 70% of Iowa soybean fields. Farmers now know what resistant varieties they can use to eliminate, reduce, maintain and improve SCN-infested fields.

For more information about this research project, please visit the National Soybean Checkoff Research Database.

Funded in part by the soybean checkoff.