Biology and Management of Soybean Stem Diseases
Sustainable Production
Biotic stressDiseaseGenetics
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Leonor Leandro, Iowa State University
Co-Principal Investigators:
Project Code:
Contributing Organization (Checkoff):
Institution Funded:
Brief Project Summary:
The goal of this proposal is to mitigate losses from stem diseases to soybean farmers and the soybean industry.
Information And Results
Project Summary

Project Objectives

Project Deliverables

Progress Of Work

Final Project Results

The goal of this project is to reduce soybean losses from stem diseases by improving management of important stem diseases, including stem canker, white mold, and SDS. Our deliverables were: 1) increased knowledge of stem pathogen biology; 2) recommendations for field practices for improved disease management; 3) germplasm with improved resistance to stem diseases and 4) extension activities and products to disseminate new information to farmers and the soybean industry. We accomplished these deliverables by: • by testing sensitivity of F. virguliforme (SDS) and Diaporthe species (stem canker) isolates to the SDHI fungicide fluopyram (Ilevo); • developing a qPCR tool to quantify the amount of Macrophomina in soybean roots, as an indication of soybean genotype resistance to charcoal rot • screening plant essential oils for ability to inhibit growth of the SDS, charcoal rot and white mold pathogens • evaluating the impact of soil amendments with biochar for SDS suppression • screening more than 700 soybean varieties and advanced breeding lines for resistance to white mold, SDS, iron deficiency chlorosis, and agronomic traits • disseminating new information to soybean stakeholders through outreach activities including: two webinars (one on Phytophthora and one of white mold) released by the Crop Protection Network; creating 3D visual displays of soybean stem diseases and using them as educational tools at large audience events; recording 3 training/outreach videos of stem diseases; and presenting research results as posters and oral presentations at scientific and extension meetings.

Benefit To Soybean Farmers

- New knowledge on the biology of pathogens that cause stem diseases on soybean - Recommendations for field practices for improved disease management - Germplasm with improved resistance to stem diseases - Extension activities and products to disseminate new information to farmers and the soybean industry

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.