2014
Assessing nematode control and yield of SCN-resistant soybean varieties in response to different soybean cyst nematode 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:
Leonor Leandro, Iowa State University
Project Code:
Contributing Organization (Checkoff):
Iowa Soybean Association
(n/a)
Institution Funded:
Iowa State University
(n/a)
Brief Project Summary:

The overall goal of the project is to provide Iowa soybean growers with a regular source of unbiased and complete information about the agronomic performance and soybean cyst nematode (SCN) control provided by soybean varieties marketed to Iowa growers as resistant to SCN. The existing ISU SCN-resistant Soybean Variety Trial Program will be expanded into a more comprehensive program for evaluation of a greater number of SCN-resistant soybean varieties sold in Iowa.

Not all soybean varieties described as resistant to the soybean cyst nematode (SCN) are truly resistant to the pathogen. In fact, some "SCN-resistant" varieties are completely susceptible, allowing unchecked SCN reproduction....

Unique Keywords:
#insects and pests, #soybean cyst nematode (scn), #soybean variety testing
Information And Results
Final Project Results

In the past six months, we compiled and published a list of SCN-resistant soybean varieties for Iowa. The publication was made available online on the Production Research section of www.iasoybeans.com and also on the ISU Extension Online Store.

The final two of three 30-day greenhouse experiments were completed to precisely assess the amount of SCN reproduction that occurred on SCN-resistant soybean varieties that were tested in the ISU SCN-resistant Soybean Variety Trial Program in 2013. In the fall of 2013, we harvested all of the plots at the nine variety trial experiments, and soil samples were collected from each plot to determine end-of-season SCN egg population densities. Once yields and SCN egg population densities were determined and statistically analyzed, results were compiled into a publication that was printed in December 2013 and distributed to 70,000 Iowa farmers and agribusiness personnel in January 2014 in the Iowa Farmer Today. To prepare for the 2014 growing season, more than 100 different seed companies in January-February 2014 were invited to nominate SCN-resistant soybean varieties that they sell to Iowa farmers to include in the 2014 ISU SCN-resistant Soybean Variety Trial Program. Also, we sought out SCN-resistant soybean varieties with Peking and Hartwig sources of SCN resistance that were not submitted for testing in the variety trials by the seed companies. The varieties for evaluation in 2014 were selected and seed was obtained.

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.