National Invasive Species Information Center
U.S. Department of Agriculture

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Displaying 21 to 26 of 26

  • 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.

  • 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.

  • NHBugs - Jumping Worms

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

  • NHBugs - Oak Wilt

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

  • Pest Alert: White Pine Blister Rust [PDF, 1.04 MB]

    • New Hampshire Department of Resources and Economic Development. Division of Forests and Lands.

    • See also: White Pine Blister Rust in NH for more resources 

  • 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.