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New Hampshire

Provides selected New Hampshire resources from agencies and organizations with an interest in the prevention, control, or eradication of invasive species.


  • New to New Hampshire - Invasive Spiny Water Flea Confirmed in Lake Winnipesaukee

    • Sep 29, 2023
    • New Hampshire Department of Environmental Services.

    • This summer, state biologists from the New Hampshire Department of Environmental Services (NHDES) documented the presence of a new aquatic invasive species to New Hampshire. The spiny water flea (Bythotrephes longimanus) was documented on September 13 in the deepest location of Lake Winnipesaukee, in the Broads in Gilford, New Hampshire. Subsequent sampling also confirmed spiny water flea presence in Alton and Wolfeboro areas of the lake. State biologists believe this is a recent infestation.

  • Boxwood Blight

    • New Hampshire Department of Agriculture, Markets, and Food.

    • Boxwood blight is a disease affecting plants in the family Buxaceae including boxwoods (Buxus), Pachysandra, and Sarcococca plants. First detected in the U.S. in 2011, it has since been found in multiple states and provinces from the East Coast to the West Coast. Boxwood blight has now been confirmed on boxwood nursery stock in New Hampshire. New Hampshire nurseries, landscapers, town officials and residents responsible for boxwood plantings should learn the symptoms associated with boxwood blight. Watch for black lesions on stems, "zonate" brown spots on leaves leading to chlorosis, and leaf drop. If boxwood blight is suspected on recently purchased boxwoods, or plants in proximity to recently purchased boxwoods, please contact the Division and collect a sample for analysis by the UNH Plant Diagnostic Lab.

  • NH Bugs - Reporting Form

    • University of New Hampshire. Cooperative Extension; New Hampshire Department of Agriculture, Markets & Food.

    • Please use this form to report any suspected invasive insect, forest pest, or disease in New Hampshire. NHBugs is a reporting tool for invasive insects and diseases detected within New Hampshire. If you are located outside of New Hampshire, please contact your state agency of agriculture to determine how to make a report in your state.

  • NHBugs - Asian Longhorned Beetle

    • University of New Hampshire. Cooperative Extension; New Hampshire Department of Agriculture, Markets & Food.

    • The Asian Longhorned Beetle (ALB) was found in Worcester, MA in August 2008 and in Boston in July 2010. This insect pest poses a serious risk to trees and forests. ALB has not yet been found in New Hampshire. Help us by looking at the debris from your swimming pools. Whenever you clean your pool, look at the debris you collect in your filter and skimmers. Use this fact sheet [PDF, 1.22 MB] to compare collected insects to common insects. Upload pictures of any insect you think is a longhorned beetle.

  • Out-of-State Decal

    • New Hampshire Department of Environmental Services.

    • On July 1, 2019, a new law (RSA 487:43) went into effect, requiring all persons operating a motorboat that is registered in another state (other than New Hampshire) on New Hampshire public waters, to display a New Hampshire aquatic invasive species decal from the Department of Environmental Services.

  • Statewide Ban on Importing Firewood

    • New Hampshire Division of Forests and Lands.

    • As of Jul 2011, New Hampshire has banned the importation of untreated firewood without a commercial or home heating compliance agreement. Firewood is a major source of damaging insects and diseases. This ban will help protect the health on New Hampshire's forests.

  • The Brown Marmorated Stink Bug in New Hampshire

    • University of New Hampshire. Cooperative Extension.

    • As of February 2015, brown marmorated stinkbug (BMSB) has been confirmed in 20 New Hampshire towns/cities. With the exception of a confirmation on nursery stock (shipped several months earlier from Long Island, NY), no specimens have yet been found on any crop. The vast majority of specimens have been found on or in buildings. We need your help. We want to find out where BMSB occurs in New Hampshire. Let us know if you see this species in or on your New Hampshire home. Verbal descriptions are not much use, but clear, close-up photos or specimens are helpful. We want to track this insect in NH and how it builds in numbers.

State Specific Threats

Selected Resources

The section below contains highly relevant resources for this location, organized by source.

  • NHBugs

    • University of New Hampshire. Cooperative Extension; New Hampshire Department of Agriculture, Markets & Food.

State and Local Government