2015
Assessing nematode control and yield of SCN-resistant soybean varieties in response to different SCN populations (Hg types)
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Contributor/Checkoff:
Iowa Soybean Association
Category:
Sustainable Production
Keywords:
Biotic stressCrop protectionField management Pest
Parent Project:
Assessing nematode control and yield of SCN-resistant soybean varieties in response to different SCN populations (Hg types)
Lead Principal Investigator:
Gregory Tylka, Iowa State University
Co-Principal Investigators:
Project Code:
Contributing Organization (Checkoff):
Iowa Soybean Association
(n/a)
Institution Funded:
Iowa State University
(n/a)
Brief Project Summary:

SCN-resistant soybean varieties are critical for managing SCN. The scientific definition of an SCN-resistant soybean variety is one that allows 10 percent or less SCN reproduction relative to a standard susceptible variety in greenhouse testing. Not all soybean varieties described as resistant to SCN truly are. In fact, some "SCN-resistant" varieties are completely susceptible, allowing unchecked SCN reproduction. This project provides comprehensive information about how well "SCN-resistant" soybean varieties suppress nematode population densities and how well the varieties yield in SCN-infested fields in Iowa. The project also is revealing relationships between SCN population HG types and yield loss on SCN-resistant soybean varieties with the different sources of resistance.

Key Benefactors:
farmers, agronomists, Extension agents, seed companies, soybean breeders

Information And Results
Project Deliverables

1. An annually updated list of SCN-resistant soybean varieties marketed to Iowa soybean farmers in maturity groups 0, 1, 2, and 3 will be compiled and published in PDF format as ISU Extension publication Pm-1649 “Soybean cyst nematode-resistant soybeans for Iowa” in October.

2. Nine field experiments will be conducted annually in which the agronomic performance and SCN control provided by 50 to 60 SCN-resistant soybean varieties will be assessed. The results of these experiments will be compiled annually into a report titled “Evaluation of soybean varieties resistant to soybean cyst nematode in Iowa” (ISU Extension publication IPM-52) that will be printed and direct mailed to 70,000 Iowa farmers and agribusiness personnel as an insert in the Iowa Farmer Today magazine.

3. SCN reproduction on the SCN-resistant soybean varieties studied in the field experiments will be measured and compared in 30-day-long greenhouse experiments to obtain basic information about the reproduction of the different SCN populations on the soybean varieties.

Final Project Results

The United Soybean Research Retention policy will display final reports with the project once completed but working files will be purged after three years. And financial information after seven years. All pertinent information is in the final report or if you want more information, please contact the project lead at your state soybean organization or principal investigator listed on the project.