Home

Welcome to the NYS Weed ID Network website. Our mission is to help you identify your weeds, so you can select the best available management to reduce crop competition and improve yields.

Effective weed management starts with weed identification; different weeds are best controlled with different management methods. We help with identification, and help you find the best management information.

 

Management Resources

 Cornell University’s Crop and Pest Management Guidelines provide annually-updated advice on weed management for New York farmers. The New York IPM program has weed management resources, as do Cornell’s organic research programs. We also provide resources from other areas on individual species pages, often from Pennsylvania, Nebraska, Kansas and other agricultural states. While these provide excellent advice, keep in mind that each state’s pesticide regulations are different, and check to make sure any suggested treatments are legal in New York.

Identifying weeds can be challenging, but there are many tools available to help. On our site, you can learn about common and problem weeds for New York’s main agricultural commodities, get help with identifying mystery weeds,  and learn about recent weed ID questions and upcoming trainings and events in New York.

 

Weeds By Crop Type

New York’s agricultural communities are wide ranging. Below find weed ID resources for the main commodity groups; if you would like to see another group added, please let us know.

Explore common weeds in field crops and their management.

Explore common weeds in tree crops and their management.

Identify common weeds in vegetable crops and their management.

Identify common weeds of berry crops and their management.

Weed ID Tools

Some types of weeds are hard to tell apart. Here are some tools to help:

Grass Identification Tools

Identify Mustards

Close up of root system, featuring fibrous root, stolon, rhizome, and tiller.
Wild mustard. Photo by Antonio DiTommaso of Cornell University.

Harmful Weeds

Giant hogweed. Image by Terry English, USDA APHIS PPQ via Bugwood.org

Identify Spring Rosettes

Virginia pepperweed mature rosette. Photo by Bruce Ackley of Ohio State University, via Bugwood.org.

Header images from left: Palmer amaranth seedling, Canada thistle flower, ivyleaf morningglory cotyledons, velvetleaf seedhead, and black nightshade seedling. First and last images courtesy of Lynn Sonoskie of Cornell University; middle three images courtesy of Cornell’s Weed Ecology and Management laboratory.