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NYSDEC Giant Hogweed Control Program

View the 2013 Giant Hogweed Program Annual Report (PDF). (3.8 MB)

View the 2012 Giant Hogweed Program Annual Report (PDF). (2.6 MB)

View the 2011 Giant Hogweed Program Annual Report (PDF). (2 MB)

The NYSDEC Giant Hogweed Control Program will control the giant hogweed (GH) plants on your property free of charge. The program currently has six field crews across the state employing 12 field technicians. NYSDEC crews use the appropriate giant hogweed control method at each site. In general, herbicide control is used at larger sites with greater than 400 plants, root-cutting control is used at smaller sites with less than 400 plants, and flower/seed head removal is used at all sites to limit seed dispersal.

How do you report a site for control?

Call the giant hogweed hotline at (845) 256-3111 or email DEC and give detailed directions to the plant infestation (GPS coordinates and street address a plus), an estimated number of plants, and provide photos. Please make sure to not touch the plants when you take the photos. The best photos to take are:

  1. One picture of the whole plant - so we can see how tall it is
  2. Pictures of the basal (bottom) leaves
  3. Close-up of the stem where the leaf stalk connects
  4. Flower head (include one from the bottom/side so the number of flower rays/stalks can be roughly counted) - if only dead seed head from last year is available, that is okay, too
  5. Close-up of seeds

Email to the address above or send photos to:

NYSDEC Division of Lands & Forests
Giant Hogweed Program
21 South Putt Corners Road
New Paltz, NY 12561

What happens when giant hogweed is confirmed?

If giant hogweed is confirmed through the photos, the landowner will be sent a packet that contains a letter of notification, a document on control methods, and a permission form to be signed and returned to the NYSDEC. The form will give field crews consent to enter the landowner's property and control the giant hogweed plants. That site will be controlled some time between April and October and will be on a list to be revisited in following years until the plants are eradicated. When no more plants are found, the site will be monitored for three subsequent years.

Funding

The NYSDEC Giant Hogweed Control Program has received funding from a federal American Resource and Recovery Act grant, USDA-APHIS, USDA-Forest Service and New York State.

History of Control Program Activities

Since 1998 USDA, NYS Department of Agriculture & Markets (NYSDAM) and Cornell Cooperative Extension surveyed for this weed in New York State through the Cooperative Agricultural Pest Survey (CAPS). CAPS led to the detection of giant hogweed in approximately half the state's counties, with most records from the western portion of New York State.

In 2006 and 2007, NYS Department of Environmental Conservation (DEC) forest health crews visited and confirmed new reported sites and gathered updated site information on known giant hogweed sites. In 2007, property ownership information was also gathered by NYSDEC using GIS and an outreach mailing.

DEC implemented manual control of GH plants starting in 2008 with three crews hired to control giant hogweed plants using a root-cutting control method. NYSDEC also began maintaining the GH hotline at this time. In 2009, two crews were hired to control the smaller sites using a manual root-cutting control method and one crew was hired to use herbicide to control the larger sites. In 2010 and 2011 DEC received an ARRA grant allowing the GH control program to double in size with five and six crews hired respectively to use either manual or chemical control methods.

In 2012 and 2013, state funds were used to hire six control crews. The USDA Forest Service supplied part of the 2013 funding through a Competitive Allocation Request Proposal (CARP). In 2012 & 2013 four partner agencies agreed to control GH sites within their boundaries: Adirondack Park Invasive Plant Program (APIPP), Catskill Regional Invasive Species Partnership (CRISP), St. Lawrence Eastern Lake Ontario (SLELO) and Oswego County Soil and Water Conservation District (OCSWCD). Accomplishments of the NY State GH control program from 2006 to 2013 can be found in Table 1.

Table 1. NYSDEC Giant Hogweed Control Program 2006-2013.
2006 & 2007 2008 2009 2010 2011 2012 2013
Giant Hogweed Hotline NYSDAM,
sites visited by DEC
200 calls 660 calls 912 calls
237 emails
1,976 calls
861 emails
967 calls
1,045 emails

592 calls
801 emails

Web site visits N/A 6,373 visits 10,770 visits 25,066 visits 307,444 visits 65,044 visits 345,665 visits
Root-cut controlled N/A 130 sites
10,558 plants
195 sites
13,354 plants
402 sites
39,411 plants
538 sites
73,793 plants
494 sites
38,781 plants
593 sites
43,023 plants
Herbicide controlled N/A N/A 146 sites
871,000 plants
210 sites
1,177,000 plants
270 sites
1,482,000 plants
347 sites
375,000 plants**

486 sites
637,000 plants**

Monitored* (no plants found) N/A 64 sites 106 sites 139 sites 204 sites 282 sites 251 sites
New sites 60 sites 122 sites 158 sites 341 sites 234 sites 179 sites 183 sites
Sites with plants 346 sites 433 sites 539 sites 805 sites 959 sites 1,010 sites 1,188 sites
Sites with no plants (after prior control)* N/A 64 sites 106 sites 139 sites. 28 of these are eradicated sites. 207 sites. 55 of these are eradicated sites 339 sites. 97 of these are eradicated sites 348 sites. 149 of these are eradicated sites.
DEC control staff hired N/A 6 people
7 people
12 people
14 people
10.5 people
12 people
Funding source State & Federal State & Federal State & Federal ARRA & Federal ARRA State State & Federal

* Monitored sites have had prior control but no GH regrowth/plants were found during the latest yearly field season's monitoring visit. After three consecutive yearly visits with no plants found, a site is deemed eradicated.

** Starting in 2012 we used a different but more consistent method of calculating the number of plants controlled by herbicide to allow for better comparison to future plant counts. 2012 and later calculations are based on the amount of herbicide used; prior year plant counts were calculated using crew plant density estimates.


  • Contact for this Page
  • NYSDEC Forest Health & Protection Program
    21 South Putt Corners Road
    New Paltz, NY 12561
    845-256-3111
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