Early-Season Corn Disease: Northern Corn Leaf Blight

Joshua Putman, Field Crops and Forage Specialist
Southwest New York Dairy, Livestock and Field Crops Program

July 22, 2020
Early-Season Corn Disease: Northern Corn Leaf Blight

In 2019, northern corn leaf blight (NCLB) appeared throughout the Southwest New York region. In general, NCLB is more of an issue in fields with a history of continuous corn production however, this year, the environment has been conducive for the infection to occur in first year corn fields as well. Environmental conditions of 65-85F, sporadic rain events, and humidity can result in an NCLB infection. Early NCLB symptoms appear as long, narrow, tan lesions that form on the leaf surface of a corn plant. As the disease progresses, the lesions become longer, more oblong, or "cigar-shaped" and can appear grayish in color. These lesions can range from 1-8 inches long with multiple lesions forming dense, irregular areas of dead tissue on the corn leaves. Cornell University Field Crops Plant Pathologist, Dr. Gary Bergstrom, recommends we scout our fields now for early disease detection. For more information visit Purdue University Extension or contact Field Crops Specialist, Josh Putman.




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Upcoming Events

MILKING IT: Moving Milk Quality Forward

April 14, 2026
Springville, NY

April 14th from 11am-1pm

Education sessions by:

  • CCE SWNY Dairy, Livestock and Field Crops 
  • Springville Veterinary Services, P.C.
  • Quality Milk Production Services


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New York Application for Dairy of Distinction

April 15, 2026

Purpose of Program

Attractive dairy farms give the consumer greater confidence in the wholesomeness of milk and stimulate milk sales which encourages public support of the dairy industry. The award gives recognition to the dairy farmer for maintaining a well-kept farmstead. 

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Virtual Egg Count Training for Sheep and Goats

April 23, 2026 : Virtual Fecal Egg Count Training for Sheep and Goats

Amy Barkley and Rachel Moody, Livestock Specialists with Cornell Cooperative Extension, will take attendees through the why, how, and interpretation of fecal egg count testing for sheep and goats using the McMaster method. 

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