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Lessons learned about 2023 tar spot cases

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A plant pathologist with University of Missouri Extension says tar spot was an earlier-than-usual issue with the drought this year.

Mandy Bish says the disease was confirmed in June and became more widespread after August rains in portions of Missouri. 

“By the end of the growing season, I had about a 90% success rate in stopping at a field and finding corn leaves with tar spot lesions on them in central Missouri.

Lessons learned about 2023 tar spot cases