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Home > Invasive Pests

Invasive Pests


Watchlist

(Not known to be in Maine, but we're looking out for them!)

Bugs

Plant Diseases

Weeds

An "invasive species" is defined as a species that is:


1) non-native (or alien) to the ecosystem under consideration, and

2) whose introduction causes or is likely to cause economic or environmental harm or harm to human health. (Executive Order 13112)

Invasive species can be plants, animals, and other organisms (e.g., microbes). Human actions are the primary means of invasive species introductions." - United States Department of Agriculture

"An invasive species is a non-native species (including seeds, eggs, spores, or other propagules) whose introduction causes or is likely to cause economic harm, environmental harm, or harm to human health. The term 'invasive'; is used for the most aggressive species. These species grow and reproduce rapidly, causing major disturbance to the areas in which they are present." - Invasive.org

 

Other definitions of Invasive Species: (Wikipedia)
  (The National Invasive Species Council - Clarification and Guidance White Paper) [PDF]

 

Note: This page includes only those invasives that we have already included as "pests" on our site. There are other species that might be considered invasive in Maine.

 

Want to Know More? More Information about Invasive Species

Invasive Plants Information—Maine Natural Areas Program

Invasive Threats to Maine's Forests and Trees—Maine Forest Service

Watchlist

Asian longhorned beetle adult

Asian Longhorned Beetle

NOT YET IN MAINE!

Brown Marmorated Stink Bug

NOT ESTABLISHED IN MAINE!

brown spruce longhorned beetleBrown Spruce Longhorned Beetle
NOT YET IN MAINE!

     

emerald ash borer adultEmerald Ash Borer
NOT YET IN MAINE!

   
 

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Bugs

Asiatic garden beetle adults

Asiatic Garden Beetle

birch leafminer adult

Birch Leafminer

browntail moth larvae

Browntail Moth

     

elm leaf beetle larvae

Elm Leaf Beetle

European Fire Ant

hemlcok woolly adelgid

Hemlock Woolly Adelgid

     

Japanese beetle adults and damage

Japanese Beetle

lily leaf beetle

Lily Leaf Beetle

multicolored Asian lady beetles

Multicolored Asian Lady Beetle

     

spotted wing drosophila adult male

Spotted Wing Drosophila

 
 

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Plant Diseases

White Pine Blister Rust

White Pine Blister Rust

lily plant with day lily rust

Daylily Rust

 
 

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Weeds

morning glory

Morning Glory (Bindweed)

purple loosestrife

Purple Loosestrife

garlic mustard

Garlic Mustard

     

cypress spurge

Cypress Spurge

quackgrass

Quackgrass

Oriental bittersweet

Oriental Bittersweet

     

giant hogweed

Giant Hogweed

Japanese knotweed

Japanese Knotweed

 
 

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Want to Know More? More Information about Invasive Species

 

[Photos, left to right: (Asian longhorned beetle) Kenneth R. Law, USDA APHIS PPQ, Bugwood.org; (brown marmorated stink bug) David R. Lance, USDA APHIS PPQ, Bugwood.org; (brown spruce longhorned beetle) Georgette Smith, Canadian Forest Service, Bugwood.org; (emerald ash borer) David Cappaert, Michigan State University, Bugwood.org; (Asiatic garden beetle) David Shetlar, Ohio State University; (birch leafminer) Cheryl Moorehead, individual, Bugwood.org; (browntail moth) Jan Samanek, State Phytosanitary Administration, Bugwood.org; (elm leaf beetle) Whitney Cranshaw, Colorado State University, Bugwood.org; (European fire ant); (hemlock woolly adelgid) Connecticut Agricultural Experiment Station Archive, Connecticut Agricultural Experiment Station, Bugwood.org; (Japanese beetle) David Cappaert, Michigan State University, Bugwood.org; (lily leaf beetle) Lisa Tewksbury, University of Rhode Island, Bugwood.org; (multicolored Asian lady beetle) Louis Tedders, USDA Agricultural Research Service, Bugwood.org; (spotted wing drosophila) Hannah Burrack, North Carolina State University, Bugwood.org; (viburnum leaf beetle) Paul Weston, Cornell University, Bugwood.org; (white pine blister rust) Joseph O'Brien, USDA Forest Service, Bugwood.org; (daylily rust) Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org; (morning glory) K. George Beck & James Sebastian, Colorado State University, Bugwood.org; (purple loosestrife) John D. Byrd, Mississippi State University, Bugwood.org; (garlic mustard) David Cappaert, Michigan State University, Bugwood.org; (cypress spurge) Todd Pfeiffer, Klamath County Weed Control, Bugwood.org; (quackgrass) Steve Dewey, Utah State University, Bugwood.org; (Oriental bittersweet) Nancy Loewenstein, Auburn University, Bugwood.org; (giant hogweed) Maine Department of Agriculture; (Japanese knotweed) Richard Old, XID Services, Inc., Bugwood.org; ]

 
It is the policy of the State of Maine to minimize reliance on pesticides. The Maine Department of Agriculture, Conservation and Forestry and the Maine IPM Council encourage everyone to practice integrated pest management and to use pesticides only as a last resort. The mention of pesticides in the fact sheets linked to these pages does not imply an endorsement of any product. Be sure that any product used is currently registered and follow all label directions.