Pale Swallow-wort

(Vincetoxicum rossicum syn. Cynanchum rossicum)

A.K.A. "Dog Strangling Vine"

Local Infestations

In Jefferson County, extremely large stands (100 to 500 acres, or more) of pale swallow-wort can be found on Grenadier Island, and Stony Point in the town of Henderson. It is also established in the townships of Adams, Antwerp, Brownville, Cape Vincent, Clayton, Ellisburg, Henderson, Lyme, Orleans, and on Fort Drum.

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Grenadier Island

Stony Point

Clark Reservation
State Park

Elbridge, NY

Great Gully
Cayuga Lake

Marcellus, NY

Agencies and organizations in Jefferson County that are part of the swallow-wort effort:

USDA - Natural Resources Conservation Services (NRCS)

The Agricultural Research Services (ARS)

FWS Fish and Wildlife Service

US Army

NYS - DEC

NYS Dept. of Transportation (DOT)

Cornell Cooperative Extension - CCE

Jefferson County Soil and Water Conservation Services - SWCS

The Nature Conservancy - TNC

Thousand Island Land Trust - TILT

Ducks Unlimited - DU

Development Authority of the North Country - DANC

NYS-Parks, Recreation and Historic Preservation (PRHP)

Invasive Plant Council - IPC-NYS

Cornell University

Carleton University, Ottawa

Ag Canada

and many private land owners

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Control: Prevention/Reporting

Local Infestations