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.
Upcoming Events
Build Your Own Bee Hotel Workshop
May 10, 2025
Belmont, NY
Create a welcoming home for native pollinators and boost your garden's health!
Planning For Immigration Enforcement At Your Farm
May 20, 2025
Ramped-up immigration enforcement is spreading fear and resulting in family and workforce disruptions across the farm landscape. Farms and employees should take action by making a plan for what to do in case of an immigration enforcement action at your farm. Planning is critical to avoid the worst outcomes. Learn about available resources and hear from the experience of crisis support leaders!
Chainsaw Safety & Forestry BMP's
June 13, 2025
Belmont, NY
Perfect for beginners or experienced users needing a refresher. We'll cover safety features and basic maintenance of the modern saw and learn kickback prevention techniques. Participants will be able to try on various PPE and learn ergonomic practices. Interested participants will learn to safely start up, throttle up, and turn off a saw. You may bring our own saw if you choose, there will be no cutting in this class.