Plant disease experts at the American Phytopathological Society annual meeting are preparing to potentially do battle with a new strain of wheat stem rust.
Washington State University plant pathologist Tim Murray says wheat stem rust has been in the United States since the early 1900s but this new strain could pose new problems. “The Ug99 strain is a new strain of this fungus that emerged in Africa in 1999,” he said. “That fungus has since spread in West Africa and there is concern in the United States that if it eventually gets here it could cause problems.” Over 80 percent of the wheat varieties currently grown globally are susceptible to the disease.
Scientists in the U.S. are working together coordinating a surveillance program to watch for the fungus, similar to the Asian soybean rust program. “It’s very similar to Asian soybean rust with the rusty red color on the plants and both spread by aerial spores,” Tim said.
No time frame for when, or if, the fungus could arrive in the U.S., but Tim says they are working on a recovery plan and they are investigating which fungicide will be most effective on it. “There are materials registered now that can be used,” he said.
Listen or download to an interview with Tim Murray here:
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Jim Evans,