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New York State Hemlock Initiative

Keeping the legacy alive



Hemlocks at Lick Brook Preserve, Tompkins County NY Photo by Carri Marschner

The USDA’s booklet on the biology and control of HWA offers an in-depth look the adelgid problem.

The Hemlock Initiative is featured in the December 2015 issue of the Finger Lakes Institute’s Happenings newsletter; it’s the final article in the issue.

The US Forest Service has provided basic information on HWA, along with a list of resources, here.

The US Forest Service published map showing where HWA was in the eastern US as of 2013: 2013 HWA Range Map

Hemlock Woolly Adelgid is under quarantine in five states and Canada: find more information here. is an excellent website for invasive species information: they have some good HWA photos here.

New York’s Department of Environmental Conservation keeps a database of pesticide applicators in New York. If you want to find a professional for HWA treatment, you can search the database for pesticide applicator businesses in your region. The search page is found here; the easiest method is to use the second search box on the right, and search by NY and county or city.

Urban Forestry Today, hosted by Cooperative Extension of New Hampshire, produced a very thoughtful presentation of the hazards and appropriate uses of neonicitinoids in landscapes and natural areas. The title is “Neonicotinoids, Bees and Urban Trees: The Controversy Defined”, and the presenter is Dr. Richard Cowles of the Connecticut Agricultural Experiment Station.

Hemlock at Lick Brook Preserve, Tompkins County NY Photo by Carri Marschner

Regional partners

The Finger Lakes Partners for Regional Invasive Species Management (PRISM) is a leader in HWA survey and monitoring for the Finger Lakes Region. They are also the go-to organization for all kinds of invasive species issues in the Finger Lakes.

The Cayuga Lake Cayuga Lake Watershed Network has been very active with surveying for HWA in Cayuga Lake’s watershed, and have found many new populations since 2013.

New York’s Master Forest Owner Program trains volunteer forest owners to visit landowners and advise on a variety of forest stewardship issues, including HWA.

Yates County CCE is actively involved in hemlock conservation.

HWA Management Programs

HWA treatment at Cornell Plantations Photo courtesy of Cornell Plantations
Surveying for biocontrol insects. Photo by Carri Marschner

The Nature Conservancy is spearheading hemlock conservation on the Allegheney Plateau: See this article and look at their document here.

The Chautauqua Watershed Conservancy is working in Western NY or HWA: visit their program here.

The Roger Tory Peterson Institute and Chautauqua County CCE are working together on HWA early detection: see this season’s plan here.

The Tennesee Wildlife Resources Foundation hosts the Tennessee Hemlock Conservation Partnership, a coalition to save high priority hemlock stands in Tennessee.

North Carolina has a very active hemlock conservation program: read about it in this Mountain Xpress article published August 2016.

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