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Northern Corn Leaf Spot (NCLS)

Northen Corn Leaf Spot has been found in other counties in Georgia and I found some here this morning. As of now we do not think it is as bad as Northern Corn Leaf Blight (NCLB). It looks similar to NCLB, but is redder and you can usually see rings in the lesion.

NCLS 2

If you need help in identification, please contact you local Extension Agent.

UGA Plant pathologist, Bob Kemerait, says “The first time I observed Northern corn leaf spot (Bipolaris zeicola) was last season. Note: Northern corn leaf spot is DIFFERENT than Northern corn leaf blight.

I do not have any data on the use of (or need for) fungicides in the management of northern corn leaf spot. In discussions with Dr. Dewey Lee, we are both uncomfortable with reports of this disease this early. Although I do not have recommendations for use of fungicides on this disease, growers need to be aware that it is active in the state. Also, I believe that growers should assess the development of this disease and may consider use of fungicides IF development and spread seems to occur in the field. Again, at this time we do not have recommendations for northern corn leaf spot.”