Herbicide Resistance Update on Marestail
Joshua Putman, Field Crops and Forage Specialist
Southwest New York Dairy, Livestock and Field Crops Program

Horticulture Weed Scientist, Dr. Lynn Sosnoskie, has been conducting some interesting research over the past few months. Extension specialists from all around the state collected and submitted weed specimens last fall for herbicide-resistance testing to better understand the best management practices for these weeds in field crops. We now have preliminary results from the first screening on horseweed aka marestail. Thirty populations have been tested so far and, it appears, that 27 out of 30 have resistance to the field-use rate of glyphosate (Roundup). Testing will continue with different chemistries so that we can provide growers with proper control measures. Join us next week for the Field Crop Series where we will cover topics on weeds, diseases, and insects in further detail.
Upcoming Events
NY Beef Producers Association Region 4 Annual Meeting
April 4, 2026
Alfred, NY
Open to all interested beef and dairy producers!
Presentations:
- Tube Feeding 101
- Early Calf Care Tips
- Handling Livestock Safely
Membership in the beef producer association is not required to attend. New memberships and renewals will be accepted at the meeting; drawing will be held for 1 free membership or renewal.
MILKING IT: Moving Milk Quality Forward
April 14, 2026
Springville, NY
***SAVE THE DATE***
More details to come!
April 14th from 11am-1pm
Education sessions by:
- CCE SWNY Dairy, Livestock and Field Crops
- Springville Veterinary Services, P.C.
- Quality Milk Production Services
New York Application for Dairy of Distinction
April 15, 2026
Purpose of Program
Attractive dairy farms give the consumer greater confidence in the wholesomeness of milk and stimulate milk sales which encourages public support of the dairy industry. The award gives recognition to the dairy farmer for maintaining a well-kept farmstead.
Announcements
No announcements at this time.





