Research Finds Multiple Herbicide-Resistant Marestail is Present in New York
Joshua Putman, Field Crops and Forage Specialist
Southwest New York Dairy, Livestock and Field Crops Program
Thirty populations of marestail (horseweed) were collected in the fall of 2020 and are being screened for resistance to commonly used herbicides. Of the 30 collected, 27 appear to be resistant to glyphosate (Roundup) and 28 populations appear to be resistant to cloransulam herbicide, an ALS-inhibitor. This indicates that we have multiple-resistance in NY. It is also suspected that 4 of these 30 samples may be resistant to paraquat (Gramoxone) herbicide. The screening efforts will continue to evaluate the effect of products like 2,4-D and dicamba, Liberty, and PPO-inhibiting herbicides like Reflex and Sharpen.
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Upcoming Events
2024 Aurora Farm Field Day
August 1, 2024
Aurora, NY
The annual Cornell Field Crop Research Field Day will be Thursday, August 1 at the Musgrave Research Farm, Aurora, N.Y. The program features walking and hay wagon tours in the morning and afternoon.
2024 Broiler Field Day at Laughing Earth Farm
August 19, 2024 : 2024 Broiler Field Day at Laughing Earth Farm
Cropseyville, NY
Join us for a free field day to explore broiler production, processing, and finances. Zack and Annie Metzger will be our hosts. They have run this 200 year-old small diversified farm for 8 years. They process their poultry in a 20C kitchen, where they produce value-added products like sausage and dehydrated chicken feet.
2024 Broiler Field Day at Majestic Farm
August 20, 2024 : 2024 Broiler Field Day at Majestic Farm
Mountaindale, NY
Join us for a free field day to explore broiler production, processing, and finances. Brett and Sara Budde will be our hosts. They raise slow-growth organic broilers on their diversified farm in large flocks on woodland pasture. Their birds are processed into whole birds, parts, and chicken sausage.
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