2011
Soybean viruses in North Dakota
Contributor/Checkoff:
Category:
Sustainable Production
Keywords:
Crop protectionDiseaseField management
Lead Principal Investigator:
Berlin Nelson, North Dakota State University
Co-Principal Investigators:
Project Code:
Contributing Organization (Checkoff):
Institution Funded:
Brief Project Summary:

The recent discovery of two viruses of soybeans in North Dakota has indicated that virus diseases in soybeans may be more widespread than previously indicated. The objective of this project is to conduct an intensive survey for soybean viruses in North Dakota over two seasons and analyze the samples for seven viruses. The goal of the project is to understand which soybean viruses could be potential threats to soybean production in the state.

Unique Keywords:
#soybean diseases, #soybean viruses
Information And Results
Project Deliverables

Final Project Results

Iron deficiency chlorosis (IDC) is a problem associated with low, wet soils. Because of very heavy precipitation and repeated ponding, four of sites were lost and the remaining site gave data with more variability than desired. In separate studies, nine different iron sources were tested as foliar fertilizers on young soybeans in the early stages of IDC. These studies were done at five locations. Leaf greenness was only slightly increased by spraying with iron. Averaged across all five sites, yields were increased from 28.6 to 32.5 bu/A for two sprays with ferrous lignosulfonate and 32.0 bu/A for two sprays of Fe-EDDHA, so there was a trend for increased yield for spraying young soybean plants showing early stages of IDC. At the site with the most severe chlorosis, yields were increased from 3.6 to 9.4 bu/A with two sprays of Fe-EDDHA, indicating that foliar sprays are of very limited help in correcting a severe chlorosis.

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.