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Home / Invasive Species Resources

Invasive Species Resources

Provides access to all site resources (alphabetically), with the option to search by species common and scientific names. Resources can be filtered by Subject, Resource Type, Location, or Source.

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USDA. Animal and Plant Health Inspection Service.

Effective immediately, the Animal and Plant Health Inspection Service (APHIS) is expanding the Phytophthora ramorum (P. ramorum) quarantine area in Del Norte County, California. APHIS is taking this action in response to the confirmation of P. ramorum in the county on September 19, 2020. The California Department of Food and Agriculture has established an intrastate quarantine for the areas in Del Norte County that mirrors the federal regulatory requirements as specified in 7 CFR 301.92.

P. ramorum is the pathogen that causes sudden oak death, ramorum leaf blight, or ramorum dieback. Sudden oak death was first reported in 1995 on tan oak in Mill Valley, Marin County, California. Through ongoing surveys, APHIS continues to define the extent of the pathogen's distribution in the United States and uses quarantine areas and public outreach to limit its artificial spread beyond infected areas. Details on APHIS-designated P. ramorum quarantine and regulated areas and the conditions to move regulated articles are in 7 CFR 301.92 and at the APHIS website.

USDA. Animal and Plant Health Inspection Service.

Effective September 30, 2021, the Animal and Plant Health Inspection Service (APHIS) and the California Department of Food and Agriculture (CDFA) established an Oriental fruit fly (Bactrocera dorsalis or OFF) quarantine in the San Jose area of Santa Clara County, California. This action is in response to the confirmed detections of six adult male OFF from the San Jose area by CDFA between September 13 and September 24, all from traps in various types of fruit trees in residential areas. By October 4, CDFA confirmed the seventh male OFF in the vicinity of the earlier finds, which expanded the quarantine further. The establishment of this quarantine area is reflected on the APHIS website, which contains a description of all current Federal fruit fly quarantine areas.

USDA. Animal and Plant Health Inspection Service.

Effective May 11, 2021, the Animal and Plant Health Inspection Service (APHIS) and the New York State Department of Agriculture and Markets (NYS AGM) expanded the European cherry fruit fly (ECFF) quarantine to include all of Monroe County and Wayne County and a small portion of northwestern Ontario County, New York. With this expansion, the ECFF quarantine now includes all of Erie, Monroe, Niagara, Orleans, and Wayne Counties. This action is necessary to prevent the spread of ECFF to non-infested areas of the United States, while maintaining commercial cherry production and marketing within the state. The APHIS website reflects the expansion of this quarantine and contains a description of all the current federal fruit fly quarantine areas.

USDA. Animal and Plant Health Inspection Service.

Effective December 17, 2021, the Animal and Plant Health Inspection Service (APHIS) is removing the light brown apple moth (LBAM), Epiphyas postvittana, quarantine in California and Hawaii. APHIS is reclassifying LBAM as a non-quarantine pest, removing all areas under quarantine, and removing movement restrictions on LBAM host material.

When APHIS first confirmed detections of LBAM in the United States in 2007, the best science available indicated that this moth would be a pest of economic significance. In response, APHIS and the California Department of Food and Agriculture (CDFA) developed an eradication program. Over time, however, it became clear that the moth’s impact was not as significant as expected.

USDA. Animal and Plant Health Inspection Service.

Effective immediately, the Animal and Plant Health Inspection Service (APHIS) is removing 45,562.067 acres from the golden nematode (GN) regulated area in Suffolk County, New York and refining the global positioning system (GPS) points for the descriptions of the regulated area in the town of Oyster Bay in Nassau County, New York. APHIS is removing these areas based on survey results and other criteria in the "Canada and United States Guidelines on Surveillance and Phytosanitary Actions for the Potato Cyst Nematodes, Globodera rostochiensis and Globodera pallida”.

Since 2010, APHIS, working closely with the New York State Department of Agriculture and Markets (NYS AGM), has removed 1,186,693.79 acres from the GN-regulated area in New York. APHIS and NYS AGM have an active control and mitigation program in place to prevent GN from spreading from the remaining 101,955.27 acres, including 5,945 GN-infested acres in eight New York counties. The specific GN-regulated areas are on the APHIS website.

Invasive Carp Regional Coordinating Committee.

The Asian Carp Regional Coordinating Committee announced the release of its 2021 Asian Carp Action Plan, a comprehensive portfolio of projects focused on Great Lakes protection.

Wildlife Forever.

Scroll down for 25 Most Harmful Nonindigenous Aquatic Species in the West

Michigan Department of Natural Resources.

The Michigan departments of Natural Resources and Agriculture and Rural Development today announced the addition of beech leaf disease to the state's invasive species watch list. Invasive species on the watch list have been identified as posing an immediate or potential threat to Michigan's economy, environment or human health. These species either have never been confirmed in the wild in Michigan or have a limited known distribution. Beech leaf disease is associated with the microscopic worm Litylenchus crenatae, a nematode that enters and spends the winter in leaf buds, causing damage to leaf tissue on American beech and European and Asian beech species. Infestations result in darkened, thick tissue bands between leaf veins, creating a striped effect on the leaves, leaf distortion and bud mortality. Trees weakened by leaf damage become susceptible to other diseases and can die within six years. Beech leaf disease has not been found in Michigan. The disease was first discovered in Ohio in 2012. Since then, it has been identified in seven eastern states and Ontario.

DOI. Bureau of Land Management.

The Bureau of Land Management has released the final programmatic environmental impact statement for fuels reduction and rangeland restoration in the Great Basin. This programmatic environmental impact statement (PEIS) is intended to further efforts to conserve and restore sagebrush communities within a 223 million-acre area that includes portions of Idaho, Oregon, Washington, California, Nevada and Utah.

Sagebrush communities in the Great Basin are a vital part of Western working landscapes and are home to over 350 species of plants and wildlife. Intact sagebrush communities are disappearing within the Great Basin due to increased large and severe wildfires, the spread of invasive annual grasses, and the encroachment of pinyon-juniper. The Great Basin region is losing sagebrush communities faster than they can reestablish naturally. Fuels reduction and rangeland restoration treatments can reduce fire severity, increase sagebrush communities' resistance to invasive annual grasses and improve their ability to recover after wildfires.

California Department of Food and Agriculture.

A state exterior quarantine has been declared to prohibit the introduction of the spotted lanternfly (SLF), Lycorma delicatula, into California. Spotted lanternfly was first detected in North American in 2014 in Pennsylvania and has now spread to nine states. The quarantine prohibits the entry into California of SLF, its host plants, and a variety of articles, including conveyances, originating from any area where an SLF infestation exists.

If you believe you have seen the spotted lanternfly, please contact CDFA's Invasive Species Hotline at 1-800-491-1899, via Report a Pest, or by contacting your local County Agricultural Commissioner.

California Invasive Plant Council.

This white paper describes the strategic advantages of an EDRR approach, puts the need for such an approach in context, and provides a suite of recommendations for action at the statewide level for California.

California Department of Fish and Wildlife.

The goals of the California Invasive Species Action Week (CISAW) are to increase public awareness of invasive species issues and promote public participation in the fight against California's invasive species and their impacts on our natural resources.

Prevention is the most effective strategy in managing invasive species. However, hundreds of invasive plants and animals have already established in California and are rapidly spreading each year. These invaders are negatively impacting our waters, our native plants and animals (some of them rare, threatened, or endangered), our agriculture, our health, our economy, and our favorite recreational places. Help us celebrate California's Invasive Species Action Week, and more importantly, help stop the spread of invasive species, by volunteering to take action.

Learn how invasive species are affecting California, with Invasive Species Week Lunchtime Talks (June 7-11, 2021). Webinars are part of California Invasive Species Action Week, organized by the California Department of Fish & Wildlife. Webinars were recorded and available for viewing.

USDA. FS. Southern Research Station. CompassLive.

Chinese privet (Ligustrum sinense) is one of the worst invasive plants in the South. It dominates the shrub layer and often becomes the only shrub underneath trees, especially in streamside areas. But insects and spiders living in fallen leaves and leaf litter were not affected by a privet invasion in Georgia, as a recent study shows.

New York State Department of Environmental Conservation.

The New York State Departments of Environmental Conservation (DEC) and Agriculture and Markets (DAM) today announced that although freezing temperatures will kill off adult spotted lanternflies (SLF), the public is urged to stay vigilant and report overwintering egg masses. In the fall, SLF will lay their eggs on any flat surface such as vehicles, firewood, outdoor furniture, stone or other items which can be inadvertently transported to new areas. If this insect becomes established in New York, it could impact New York's forests, agricultural and tourism industries. "To date, there has not been a documented spotted lanternfly infestation in New York, but I encourage the public to stay aware and be ready to report egg masses or other signs of this insect to help prevent infestations," said DEC Commissioner Basil Seggos.

Assistance from the public is crucial in limiting the movement of SLF and protecting New York's natural resources. DEC and DAM are urging the public to inspect outdoor items such as vehicles, outdoor furniture and camping equipment for egg masses or insects, and report any sightings by sending photos and location information to spottedlanternfly@dec.ny.gov. Anyone that visits locations of SLF quarantines in other states should look for and remove insects and egg masses on items before leaving those areas. For more information, please visit DEC's spotted lanternfly webpage.

Western Governors' Association.

Officials at the U.S. Department of the Interior (DOI) announced in June 2017 that DOI would coordinate with the Western Governors' Association, states, tribes, federal agencies, and other partners in a project to help strengthen existing efforts to address invasive mussels. The actions described in the 2017 report, Safeguarding the West from Invasive Species, Actions to Strengthen Federal, State, and Tribal Coordination to Address Invasive Mussels (PDF | 1.3 MB), vary from policy and program reviews to on-the-ground efforts to prevent, contain, and control invasive mussels. One recommendation in Safeguarding the West was the development of a reference manual to facilitate rapid response activities in the event of mussel introductions in the Columbia River Basin. The U.S. Fish and Wildlife Service recently finalized and released this manual, Dreissenid Mussel Rapid Response in the Columbia River Basin: Recommended Practices to Facilitate Endangered Species Act Section 7 Compliance (PDF | 3.63 MB).

Michigan Department of Natural Resources.

The Michigan departments of Environment, Great Lakes, and Energy and Natural Resources confirmed a report of didymo, a nuisance freshwater alga, in a stretch of the Upper Manistee River in Kalkaska County. Also known as rock snot despite its coarse, woolly texture, didymo can grow into thick mats that cover the river bottom. The Manistee River finding marks the first detection of didymo blooms in the Lower Peninsula. In 2015, extensive mats of didymo were found on the Michigan side of the St. Marys River near Sault Ste. Marie in the Upper Peninsula.

If you observe didymo in the water, either as small, cotton ball-sized patches or thick blankets with rope-like strings that flow in currents, take photos, note the location and report it by using the Midwest Invasive Species Information Network, available online at MISIN.MSU.edu or as a downloadable smartphone app. The MISIN smartphone app will take a GPS location point if a report is made at the site; it also will allow you to upload photos with a report. Find more information on didymo and how to identify it at Michigan.gov/Invasives.

United States Department of Agriculture.

Cattle grazing on a nearly half mile wide targeted strip of cheatgrass near Beowawe, Nevada, created a firebreak that helped limit a rangeland fire to just 54 acres this past August compared to rangeland fires that more commonly race across thousands of acres of the Great Basin. This "targeted grazing" firebreak and eight others are part of an evaluation project being managed by the Agricultural Research Service (ARS), partnering with other federal, state and local agencies and local cattle ranchers in Idaho, Nevada and Oregon. These demonstration sites are being studied so the concept's efficacy and environmental impacts can be uniformly evaluated and compared.

Cheatgrass, also known as downy brome, is an invasive annual that dominates more than 100 million acres of the Great Basin in the western U.S. Germinating each winter, cheatgrass grows furiously in spring and dies in early summer, leaving the range carpeted in golden dry tinder. The Great Basin now has the nation's highest wildfire risk, and rangeland fires are outpacing forest fires when it comes to acreage destroyed.

Midwest Invasive Plant Network.

MIPN synthesized recent research on garlic mustard and developed recommendations to help managers navigate sometimes-conflicting information about whether and how to prioritize management of this species. This 12 page guide includes a decision-support tree and a box discussion of best practices for volunteer pull events.

Conference of Great Lakes and St. Lawrence Governors and Premiers.

In a letter (PDF | 396 KB) to the Chairs and Ranking Members of the U.S. Senate Committee on Environment and Public Works and the U.S. House Committee on Transportation and Infrastructure, the Governors of the eight Great Lakes States have called on the U.S. Congress to provide full federal funding in the 2022 Water Resources Reform and Development Act for the remaining design, construction, operation, and maintenance costs of the Brandon Road Lock and Dam project. The project is intended to prevent invasive carp from migrating up the Mississippi River and entering and colonizing in the Great Lakes.

National Science Foundation.

The green crab, Carcinus maenas, is a widely distributed invasive species that eventually alters its new environment. It's assumed that such species have high genetic diversity, or a variety of characteristics allowing them to adapt and thrive. But the green crab has low genetic diversity, while still spreading rapidly in a new part of the world. A U.S. National Science Foundation-funded study led by Carolyn Tepolot of the Woods Hole Oceanographic Institution is investigating the adaptive mechanisms of the green crab along the west coast of North America, where it has shown extensive dispersal in the last decade despite minimal genetic diversity. The results are published in Molecular Ecology. The project is a collaboration among scientists at WHOI, Portland State University, the Smithsonian Environmental Research Center and the University of California, Davis.