Suspected tar spot identified in Ontario corn field

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Eagle-eyed agronomists and researchers in Ontario’s southern corn growing region have identified what they believe is tar spot, a disease that can reduce corn yields by 40 bushels an acre.

The fungal disease has been steadily moving north out of the U.S., and researchers here have been anticipating the find for some time. Ontario Ministry of Agriculture, Food and Rural Affairs plant pathologist Albert Tenuta tweeted on September 22:

RealAgriculture’s Bern Tobin and Ontario research and extension staff have been covering the disease for some time. Learn more about identification, yield impact, management and more here:

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