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Climate change provides good growing conditions for charcoal rot in soybeans
Date:7/9/2014

URBANA, Ill. With over 100 diseases that can attack soybean crops, why would charcoal rot rise to the top of the most wanted list? University of Illinois scientists cite the earth's changing climate as one reason that more research is needed on the fungus that causes charcoal rot.

Fungi may often be associated with cool, damp growing conditions but Macrophomina phaseolina, the fungus that causes charcoal rot, prefers hot and dry drought conditions.

"As the climate continues to change and we see more extremes in the weather, including hotter, drier summers, this fungus will have more favorable conditions to gain a foothold in soybean and other crops," said Osman Radwan, a U of I molecular biologist. "If we look at diseases of soybean, we find that soybean cyst nematode (SCN) is at the top, but in the past decade or so, charcoal rot has become one of the top 10 diseases that affect soybean yield."

In examining previous studies on charcoal rot, Radwan and his team noticed that worsening weather conditions associated with climate change, such as higher heat and drought, brought an increase in the incidence of charcoal rot in soybean. He suggests that a research strategy be created to develop a high-yielding soybean that is both resistant to charcoal rot and drought tolerant.

"Right now we are screening lines of soybean to charcoal rot and drought stress, in collaboration with Glen Hartman, a USDA-ARS and U of I plant pathologist," Radwan said.

"His team is screening for charcoal rot resistance, and I am screening for drought tolerance," Radwan said. "Our ultimate goal is to identify the line that shows resistance to both charcoal rot and drought stress and in this way improve soybean tolerance to both the pathogen and the extreme weather conditions."

The review of research on the subject has been written along with Hartman and Schuyler Korban from U of I. Radwan said that this background for what
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Contact: Debra Levey Larson
dlarson@illinois.edu
217-244-2880
University of Illinois College of Agricultural, Consumer and Environmental Sciences
Source:Eurekalert  

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