Success StoryUnderstanding presence of the emerging corn disease Diplodia leaf streak in Kentucky



Understanding presence of the emerging corn disease Diplodia leaf streak in Kentucky

Author: Kiersten Wise

Planning Unit: Plant Pathology

Major Program: Integrated Plant Pest Management

Outcome: Intermediate Outcome

The disease Diplodia leaf streak, caused by the fungus Stenocarpella macrospora, has emerged as a prevalent corn disease in Kentucky over the last 3 years.  Incidence and severity have increased in corn over this time period. The disease is easily confused with other common foliar diseases, leading to misdiagnosis in field settings. A survey of 18 counties was conducted in 2018 to determine presence of Diplodia leaf streak across the state. County Agents in selected counties were contacted and arranged fields for scouting. Samples were collected and taken back to the laboratory for diagnosis. Diplodia leaf streak was confirmed in 13 of the 18 counties, indicating that the disease is widespread across Kentucky, and research is underway to learn more about the economic impact of this disease. An Extension publication was published in 2018 to create awareness about this disease and aid with accurate diagnosis. http://plantpathology.ca.uky.edu/files/ppfs-ag-c-08.pdf






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