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Ornamentals Diseases

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Spores of the Macrophomina phaseolina pathogen can be seen as transparent ovals in this microscopic image taken from an infected corn plant. (Photo by MSU Extension Service/ Clarissa Balbalian)
January 13, 2017 - Filed Under: Ornamentals Diseases

CRYSTAL SPRINGS, Miss. -- When impatiens planted as part of a Mississippi State University variety trial died within two weeks, researchers acted quickly and described a pathogen never before seen in this flower.

"We were growing SunPatiens, which are hybrid impatiens immune to downy mildew. This disease has been a big problem for the industry," Broderick said. "The plants were doing really well, but in July they started to look like they were wilting. The stems were collapsing and dying, and in a two-week period, they went from looking relatively healthy to dead."

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