​​Diagnostics Tools for Identification of Soybean Root Rot Diseases

July 2016 | 16 min., 41 sec.
by Alejandro Rojas
Michigan State University
https://doi.org/10.1094/GROW-SOY-07-16-133

Summary

​In a recent survey of oomycetes associated with diseased soybean seedlings, a total of 84 different oomycete species were found. Phytophthora sojae was found in 8 out of 11 states, but the frequency of isolation was relatively low. In addition, Phytophthora sansomeana was found in 6 out of 11 states at low frequency. Both species have been reported as pathogens of soybean, and the importance and distribution of P. sojae is well known in the U.S. However, this is not the case for P. sansomeana which is a recently described species and has been frequently isolated from soybean fields. Therefore, diagnostic tools that could distinguish and identify both pathogens have a great value to improve diagnosis and inform disease management decisions.

About the Presenter

Alejandro Rojas​ Alejandro Rojas is a fifth year PhD student in the Plant, Soil and Microbial Sciences Department at Michigan State University. He earned his BS with a major in microbiology and a minor in chemistry and MSc in microbiology from Los Andes University (Bogotá, Colombia). He decided to pursue a second MSc in plant pathology at Michigan State University, where he continued research on the oomycete Phytophthora infestans causal agent of late blight, looking at population genetics and virulence with Dr. William Kirk. In 2011, he joined Dr. Martin Chilvers lab to work on the diversity of oomycetes associated with soybean seedling diseases, where he characterized oomycetes collected from 11 states across the soybean producing region of the U.S. and worked on the development of diagnostic tools for specific oomycete species.​

Contact Information:
Email: rojasfle@msu.edu

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​Grant Funding

​This webcast was supported by funds provided through the United States Department of Agriculture, USDA-NIFA Project No. 2011-68004-30104.


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