Suspected Herbicide-Resistant Tall Waterhemp Now Present in Upstate New York

Joshua Putman, Field Crops and Forage Specialist
Southwest New York Dairy, Livestock and Field Crops Program

August 14, 2019
Suspected Herbicide-Resistant Tall Waterhemp Now Present in Upstate New York

Tall waterhemp is one of the most problematic weed species throughout the Midwest and has now arrived and spread to eight counties in Upstate New York (Figure 1).

It also happens to be one of our weed species that is glyphosate-resistant or better known as Roundup-resistant. Recent research conducted by Dr. Bryan Brown, Integrated Weed Management Specialist at the Geneva Experiment Station, has found 2 populations of waterhemp that survived an application of atrazine, imazethapyr (Pursuit) and glyphosate - meaning these populations are resistant to multiple Modes of Action (MOA's). Waterhemp is a part of the pigweed family and has evolved resistance to herbicides very quickly. Waterhemp is dioecous, meaning there are separate male and female plants. Another reason this weed is problematic is that it grows very rapidly and can produce more than 1 million seeds per plant. It competes for sunlight, water and nutrients. Waterhemp can spread from field-to-field and farm-to-farm on equipment, clothing, application equipment, or via water from over flooded ditches and rivers. Currently, research is being conducted to evaluate various PRE and POSTEMERGE herbicide options for controlling this weed in both corn and soybeans here in New York. It is important to know the difference between this weed and other pigweed's like it.

 

 




Field Crops

Field Crops

Dairy

Dairy

Business

Business

Livestock

Livestock

Grains

Grains

Upcoming Events

2024 Aurora Farm Field Day

Event Offers DEC Credits

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. 

View 2024 Aurora Farm Field Day Details

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.

View 2024 Broiler Field Day at Laughing Earth Farm Details

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.

View 2024 Broiler Field Day at Majestic Farm Details

Announcements

No announcements at this time.

NEWSLETTER   |   CURRENT PROJECTS   |   IMPACT IN NY   |   SPONSORSHIP  |  RESOURCES   |   SITE MAP