Early-Season Corn Disease: Northern Corn Leaf Blight
Joshua Putman, Field Crops and Forage Specialist
Southwest New York Dairy, Livestock and Field Crops Program
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
NYSDEC How to Get Certified Course
March 3, 2026 : NYSDEC How to Get Certified Course
Ellicottville, NY
NYSDEC training course in preparation to take the pesticide applicator exam.
From Data to Dollars: Making Data-driven Decisions to Increase Farmers Market Success
March 3, 2026
The Cornell Agricultural Marketing Research Program and Penn State University are excited to present this new, 6-week course as part of Cornell's Farmers Market Research Project. The course is for farmers with experience selling at farmers markets who wish to increase their earnings through management and marketing practices.
Cornell Organic Field Crops & Dairy Conference
March 6, 2026
Waterloo, NY
Farmers, researchers, educators, and agricultural service providers from across the Northeast are invited to the 2026 Cornell Organic Field Crops & Dairy Conference, held Friday, March 6, 2026, from 8:00 a.m. to 4:30 p.m. at the Lux Hotel & Conference Center in Waterloo, N.Y.
Co-hosted by New York Soil Health and Cornell CALS, the annual conference brings together leaders in organic grain, dairy, and livestock systems to share practical tools, new research, and farmer-tested strategies to support resilient and profitable organic production.
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