Managing Corn Rootworm and a New Control Option for New York Farmers
Joshua Putman, Field Crops and Forage Specialist
Southwest New York Dairy, Livestock and Field Crops Program
Across the U.S. and within NY, corn rootworm (CRW) is developing resistance to the Bt-Rootworm traits in our corn hybrids, causing increased root damage and decreasing yields. Yield losses from CRW root feeding can surpass 10% without any above ground symptoms, making this type of loss difficult to detect. Dr. Elson Shields, Field Crops Entomologist with Cornell University, has been working with a biocontrol nematode to combat alfalfa snout beetle in Northern NY and most recently, to battle CRW in the state. "New York research data indicates a single soil inoculation establishes these NY adapted biocontrol nematodes in the soil profile for many years, where they attack a wide range of pest soil insects across a wide variety of crops. During the corn years, these biocontrol nematodes attack rootworm larvae and during the alfalfa years, attack wireworms, white grubs, clover root curculio feeding on the alfalfa and grass in the field" says Shields. With 2020 harvest coming to an end, did you notice any fields of lodged corn? Contact Josh Putman if interested in learning more about this yield-robbing pest.
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Upcoming Events
Animal Mortality Composting Demo
November 6, 2025 : Animal Mortality Composting Demo
Brant, NY
Join experts from Cornell's Waste Management Institute, Local Soil and Water Conservation Districts, Pro-Dairy, CCE, and WNY Crop Management as we evaluate a newly constructed livestock compost pile at a local dairy farm. Attendees will be able to learn how to properly design a pad and pile, evaluate pile success, and understand common pitfalls to proper composting.
Optimizing the Economic Return of Pasture-Raised Slow-Growth and Conventional Broilers - Webinar
November 13, 2025 : Optimizing the Economic Return of Pasture-Raised Slow-Growth and Conventional Broilers - Webinar
Over the past three years, Cornell Cooperative Extension has worked with nearly 40 small farmers across NYS to gather information on the true costs of raising broilers (meat chickens) on pasture. This presentation is a summary of the findings of this research project.
NY Small Farms Summit 2025: Stronger Together
December 5, 2025
Alfred, NY
We hope you will join us on December 5th for the 2025 New York Small Farms Summit! This is an opportunity to meet other farmers and ag supporters, learn about research and education projects, and set priorities for future efforts to grow small farm success.
At the Allegany County site, we will focus on giving trees a chance and how trees build resiliency on small farms. Whether attracted to fruit, nuts, vegetables, fodder or shade, trees can be an integral part of a successful farming system. Join us as we explore the opportunities for resiliency that come from adding tree crops or managing wooded areas of your farm for agroforestry or silvopasture systems.
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