Corn Diseases in Southwest NY
Joshua Putman, Field Crops and Forage Specialist
Southwest New York Dairy, Livestock and Field Crops Program
The 2019 growing season was favorable to diseases in our corn and soybean production systems. In southwest NY, Northern Corn Leaf Blight (NCLB) and Grey Leaf Spot (GLS) showed up and spread throughout our corn fields. Northern corn leaf blight fungus survives the winter on infected corn residue and remains on the soil surface. As temperatures increase in the spring, the fungus produces spores which then splash or are wind-blown onto the lower canopy of the corn plants. Last year, the cool, wet summer allowed for early appearance in our corn fields. Grey leaf spot is a destructive disease that can significantly reduce yields. Just like NCLB, the disease survives on corn residue on the soil surface and splash from the soil surface onto the lower leaves of a corn plant. The wind can carry the spores to a neighboring field if the disease is present in the crop residue. These two diseases can result in 10-50% yield reductions if the timing and conditions are favorable. Weather is the primary influence on the development of these diseases, but proper management with hybrid selection and use of an in-season fungicide will help limit the exposure to these diseases. Contact your local extension specialist for correct identification and management of these pests!
For more information see: https://www.extension.purdue.edu/extmedia/BP/BP-56-W.pdf;
https://www.extension.purdue.edu/extmedia/BP/BP-84-W.pdf
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Upcoming Events
NY Sheep Shearing School 2025
March 15, 2025
East Meredith, NY
This 2-day sheep shearing school is great for beginners and also for those who want to improve their current shearing skills. Doug Rathke, a seasoned shearer, knows what it takes to learn the art of shearing and he knows what it takes to teach it on a level so it can be understood and retained.
This class will give you the confidence to start shearing your own flock or take it to the next level and earn income by shearing for others.
Avian Disease and Highly Pathogenic Avian Influenza - the latest updates and what it means for poultry health
March 18, 2025
In light of the state of HPAI across the country and in NYS, the Poultry Subgroup of the Livestock PWT has developed two webinars to assist small farms and backyard laying flock owners to make informed decisions around getting laying hens and managing disease, while keeping abreast of the current status of HPAI and how they can keep it out of their flocks.
Join Dr. Jarra Jagne of Cornell's College of Veterinary Medicine and Dr. Chad Wall of NYS Department of Agriculture and Markets for an evening of learning about avian disease, including Highly Pathogenic Avian Influenza (HPAI). We'll cover:
- Updates on the HPAI outbreak
- Symptoms of HPAI
- Common small flock diseases
- HPAI disease look-alikes
- Keeping your birds safe
Shop Talk: Integrated Weed Management
March 19, 2025
Andover, NY
Mike Hunter, Field Crop IPM Coordinator, will share his knowledge on managing weeds. The discussion will cover various management practices in both conventional and organic settings, including herbicide-resistant weeds.
Announcements
Transition Heifer Calf Program
Join us for this hand-on program and demos! We will be offering this program in English and in Spanish.Calf and heifer managers, dairy herdspersons, farm owners, and heifer raisers interested in learning more about how to better house and manage animals as they transition from the calf phase to the weaned heifer phase.
Topics covered:
Nutrition
Health
Housing Management
Inventory Management
Biosecurity: All attendees must wear clean clothes and boots. You will be required to scrub and disinfect footwear upon arrival to the program and before leaving.
Registration: $25 per person (includes lunch)