Cornell Cooperative Extension

Columbia and Greene Counties
hemlock woolly adelgid/ Adelges tsugae Annand USDA Forest Service
Image by Elizabeth Willhite

Hemlock wooly adelgid is a dangerous pest of hemlock trees.

The clitellum or collar of the jumping worm goes all the way around the body and is smooth. The worms are very active and have a sheen to them. When disturbed, the jumping worm (amyhthas agretis) will actively trash and flip, slither snake-like, and may shed their tails.
Image by Wisconsin Department of Natural Resources

Jumping worms (amynthas agretis) showing up locally

A large poison ivy vine growing up a tree.

70% of the US population is sensitive to Poison ivy

Invasive & Nuisance Species

Invasive species are non-native plants and animals that spread rapidly causing ecological and economic harm. Common examples are the emerald ash borer, Norway maple, and Asian clam. Invasive species are usually spread by humans. Once established, they become increasingly difficult to manage. Early detection of invasives is key to containment and practical management.

Nuisance species may be native or non-native, and may cause ecological and economic harm. Common examples are poison ivy and Canadian geese.

Last updated October 26, 2020

Invasive & Nuisance Species

Free Identifications!

graphic for insect identification; insect and magnifying glass

Information and free Invasive Species Identification Services are offered at Cornell Cooperative Extension of Columbia and Greene Counties. If you find a plant, insect or animal that you suspect could be invasive, please bring it to our offices in Acra or Hudson for a confirmation. You may also send a clear photo with your contact information in the mail or in an e-mail [email protected].  If an invasive species is confirmed, you will be given current information including management strategies for the particular species.  Together we can make a difference and stop the invasion!

CRISP

Logo for the Catskill Regional Invasive Species Partnership (850x425)

The Catskill Regional Invasive Species Partnership (CRISP) promotes education, prevention, early detection and control of invasive species to limit their impact on the ecosystems and economies of the Catskills. Visit their WEBSITE for more!

HOTLINE: Reporting Invasive plant or pests

CRISP (Catskill Regional Invasive Species Partnership) - 845- 586-2611(Catskill Mt. region)

Capital Mohawk Invasive Species Partnership -518-885-8995. (Upper Hudson Valley/Capital district)

Logo for iMap Invasives

iMapInvasives is an online tool for invasive species reporting and data management.

NYISCH image created from images on their website, to serve as a photo link.

Events

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Invasive Agricultural Plants Found in New York State

Agricultural weeds cause an estimated 12% crop losses ($33 ± billion/year) nationwide. Approximately $4 billion/year is spent on herbicides to control invasive plants. Learn how to identify these weeds.