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New Study Reveals Surprising Insights Into Tar Spot Management

A new study led by a team of researchers from Michigan State University and FMC Corporation, has challenged conventional wisdom in the management of tar spot, a significant corn pathogen in the U.S. and Canada.

Contrary to previous assumptions, the study found no evidence supporting a relationship between nitrogen application rates and tar spot severity. The research suggests that nitrogen application does not influence the severity of tar spot.

Key Findings:

  1. No Relationship Between Nitrogen (N) Application and Tar Spot Severity: The study found no evidence supporting a relationship between nitrogen application rates and tar spot severity. The research suggests that nitrogen application does not influence the severity of tar spot.

  2. Plant Population Density Impact: Higher plant population densities were unexpectedly associated with lower tar spot severity.

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Understanding the Blackleg & Verticillium Connection Webinar

Video: Understanding the Blackleg & Verticillium Connection Webinar

This webinar will explore the emerging connection between blackleg and verticillium stripe in canola, two diseases increasingly shaping yield risk across the Prairies. Presented by Ian Epp of Sask Oilseeds, the session will unpack current research and field observations that highlight how blackleg infection may influence the development and severity of verticillium stripe later in the season.

You will gain insight into disease biology, environmental drivers, and the role of variety selection, rotation, and management decisions in reducing overall disease pressure. The webinar will also connect the dots between early-season disease management and long-term risk, helping growers and agronomists better anticipate challenges and adapt strategies for more resilient canola production.