New Hampshire - National Invasive Species Information Center

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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.

Spotlights

• 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 (Calonectria pseudonaviculata, BB) kills plants in the family Buxaceae, including boxwoods, pachysandra, and Sarcococca. It was first detected in the U.S. in 2011, and many states have implemented requirements for boxwoods to have been grown in a certified “clean boxwood” program to ship into their state. When this disease is found in New Hampshire nurseries, infected plants are required to be destroyed. BB has been rarely found in managed boxwood plantations in the state. Care is recommended when introducing new boxwood plants into existing plantations as the disease can be latent and difficult to detect. The Horticultural Research Institute has best management practices guidelines for production and landscape managers.

• 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.

• 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

• Clemson Officials Find, Destroy Yellow-legged Hornet Nests in Beaufort County

  • Aug 16, 2024

  • Clemson University.

  • The Clemson University Department of Plant Industry destroyed the first secondary nests of the yellow-legged hornet this month in South Carolina near Hilton Head Island. Yellow-legged hornets were also detected in November 2023 in a trap in South Carolina.

• Early Detection & Distribution Mapping System (EDDMapS) - Invasive Species Status Report by State

  • University of Georgia. Center for Invasive Species and Ecosystem Health.

  • Includes invasive species by category for insects, diseases, plants, and animals.See also: Invasive Species Status Report by Congressional District

• Nonindigenous Aquatic Species (NAS) Database - Species Lists By State

  • DOI. USGS. Wetland and Aquatic Research Center.

  • Provides fact sheets, maps and collection information for aquatic vertebrates and invertebrates occurring outside of their native range.

• Pest Tracker - Exotic Pest Detection By State

  • USDA. APHIS. Cooperative Agricultural Pest Survey (CAPS). National Agricultural Pest Information System (NAPIS).

  • Provides State pest detection contacts, recent state exotic pest news, links to state pest resources, and a list of state CAPS survey targets.See also: Pest List for information and maps, and CAPS Resource and Collaboration Site, includes National Priority Pest List.

All Resources

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Selected Resources

Partnership

• NHBugs

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

State and Local Government

• Boating and Fishing - Invasive Species

  • New Hampshire Department of Environmental Services.

• Division of Plant Industry

  • New Hampshire Department of Agriculture, Markets & Food.

• Forest Health

  • New Hampshire Division of Forests and Lands.

• Invasive Species and Parasites

  • New Hampshire Fish and Game Department.

• Invasive Species Best Management Practices

  • New Hampshire Department of Transportation.

  • To address mounting concerns over invasive plants and the role NHDOT activities play in the spread of these plants along roadsides, Best Management Practices (BMPs) have been developed with input from Maintenance Districts, the Roadside Development Section, the Bureau of Construction, and the NH Department of Agriculture. Implementation of these BMPs will help prevent the spread of invasive plants caused by maintenance and construction activities.

• Picking Our Battles: Planning Successful Invasive Plant Management Projects

  • New Hampshire Fish and Game Department.

Academic

• Forests & Trees - Invasive Species

  • University of New Hampshire. Cooperative Extension.

• New Hampshire Integrated Pest Management

  • University of New Hampshire. Cooperative Extension.

Professional

• Lake Host Program

  • New Hampshire Lakes Association.

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