Assessment of the Potential Year-Round Establishment of Soybean Rust Throughout the World

Plant Disease
S Pivonia, X B Yang

Abstract

Soybean rust (Phakopsora pachyrhizi Sydow) has been known to occur in eastern Asia and Aus-tralia for decades. In recent years, the disease entered Africa and South America and has spread rapidly in these continents. It has become a concern to the U.S. soybean industry. To assess the threat of soybean rust, we used a modeling approach to determine the potential geographical zones where the fungus might overwinter and serve as source areas for seasonal epidemics. Long-term meteorological averages were used to assess the temperature stresses by using CLIMEX, and the dry stress with an algorithm developed in this study. Integration of stresses was used to predict the likelihood of survival of the rust in a defined location. Our results suggest that the new soybean rust invasions in Africa and South America occurred in the areas where the fungus might persist year-round. The main regions where rust has not been reported but might overwinter are located in the western hemisphere, including northern South America, Central America, the Caribbean, Mexico, southern Texas, and Florida. Southeastern China and neighboring areas are suggested as the primary regions where initial spores for soybean rust epidemics in central China are produce...Continue Reading

Citations

Jun 9, 2006·Microbiology and Molecular Biology Reviews : MMBR·J FletcherS A Tolin
Jun 16, 2006·Planta·Kurt MendgenWilhelm Boland
Nov 1, 2008·Plant Disease·H K OlokaS Shanmugasundram
Sep 22, 2010·International Journal of Biometeorology·Emerson M Del PonteWalter E Baethgen
Mar 11, 2009·Phytopathology·C W BarnesV C Bowersox
Sep 16, 2010·Phytopathology·Zhiwei D FangFrancis J Schmidt
Apr 22, 2010·Ecological Applications : a Publication of the Ecological Society of America·Anna M FabiszewskiCharles E Mitchell
Nov 1, 2008·Plant Disease·Wayne M JurickPhilip F Harmon
Mar 12, 2021·Plant Cell Reports·Ervin D NagyRobert T Gaeta

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