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In an effort to monitor invasive northern snakeheads in the Chesapeake Bay and Blackwater River, the Maryland Department of Natural Resources (DNR) announces a new tagging program in conjunction with the U.S. Fish and Wildlife Service (USFWS). Both agencies are placing yellow or blue tags on up to 500 northern snakeheads. Each tagged northern snakehead caught and harvested from now until 2024 could be rewarded with a gift card of $10 or $200 depending on the tag.

In order to qualify, the harvester must report the tag number to USFWS at 800-448-8322, and is asked to take a picture of their harvested and tagged northern snakehead. Only harvested northern snakeheads with reported tags will qualify for gift cards.

ARS works with foreign scientists to prevent overseas diseases from spreading to the United States. This collaboration specifically targets research that cannot be conducted in the U.S., either because a disease does not exist here or the expertise in a pathogen resides overseas. Of particular concern are emerging diseases that may spread from animals to infect humans.

USDA NIFA research investment in Texas A&M AgriLife leads to breakthrough in fighting agricultural plant diseases. Researchers have made a discovery that will help combat fastidious pathogens, which cost U.S. agriculture alone billions of dollars annually.

Electronic noses are sensitive to a vast suite of volatile organic compounds that every living organism emits. A new USDA Forest Service study shows that e-noses can detect emerald ash borer (Agrilus planipennis) larvae lurking under the bark – an early, noninvasive detection method. 

New website delivers spectacular images and details of some of the world's bees. ARS scientists need your help in monitoring and protecting our important pollinators. The Exotic Bee ID website, designed and developed as a screening aid to support identification of non-native bees, offers spectacular views of some of our most important and not so important pollinators with stunning clarity. Watch the  video to learn more about this new tool.

Exotic Bee ID was designed and developed as an interactive screening aid to help those that monitor and intercept non-native bees in the U.S. Theintention is to help reduce the loss of valuable native pollinators through early detection of possible invasives.

Over recent decades, globalization has led to an increase in the international flow of people and goods, bringing people together but also bringing together species that have never coexisted before. Species that are introduced and successfully colonize areas outside their natural ranges are considered ‘invasive’ and can have devastating impacts on species native to the region. Invasive species can cause the decline or extinction of native species, outcompeting them for food, water and space, preying upon them or introducing them to new diseases.

How can an insect that is smaller than a penny cause so much ecological, economic, and cultural devastation? The emerald ash borer, an invasive beetle native to Asia, is one of the most destructive invasive species in North America. These tiny pests killed tens of millions of ash trees in the northeast – and continue to this day.

In Maine, a coalition of Indigenous and non-Indigenous researchers, tribal members, state and federal foresters, conservation groups, and local communities have been working for the past twenty years to prepare for the onset of emerald ash borer in northeastern forests. The group, called the Ash Protection Collaboration Across Wabanakik, is focused on identifying research-informed strategies to protect the future of ash trees.

The arid and semiarid Great Basin of the western United States comprises parts of California, Nevada, Utah, Idaho, and Oregon and can variously be described by its hydrology, topography, or biology. Biologically, the area has been defined historically by the native sagebrush and shrubs that thrive in the dry valleys of the Sierra Nevada and Cascade Mountains. But, as a recent study undertaken by researchers at the University of Montana and the Department of Agriculture notes, these native plant communities are rapidly being colonized by nonnative annual grasses like cheatgrass (Bromus tectorum), red brome (B. rubens), and medusahead (Taeniatherum caput-medusae) to the detriment of wildlife and humans.

USDA Forest Service scientists are exploring the impacts of invasive species in forests and rangelands of the United States and developing early intervention strategies that land managers can take as well as strategies for restoring impacted landscapes.

Nonnative tree species are gaining a foothold in forest ecosystems. These trees compete with native species for resources, sunlight, and space. Tree of heaven and Chinese tallow tree are the most invasive tree species in the South, according to a recent study which uses Forest Inventory & Analysis data to create an indicator of nonnative tree regeneration success and can help prioritize the species and locations for treatment. 

Spotted-wing drosophila (Drosophila suzukii), is an invasive fruit fly species that causes about $500 million in economic damage to fruit crops in the U.S. each year. A native to southeast Asia, it arrived in the U.S. in Hawaii in the 1980s and in the continental U.S. in California in 2008. It is now widespread through many parts of the U.S. and the world. In a new review article published last week in the Journal of Economic Entomology, Vaughn Walton, Ph.D., of Oregon State University and a multi-university team of experts have created a comprehensive look at how SWD management strategies are evolving to address these challenges.

The U.S. Department of Agriculture grant that funds part of Walton and colleagues SWD research stipulates that they work with industry influencers, and they have been doing this from the beginning. They bring technologies to industry and seek feedback on how well the technologies work in actual practice. "Federal funding is allowing us to listen to and serve our clients—the growers," Walton says. As the Journal of Economic Entomology paper details, many promising control strategies are being developed for this challenging and uniquely adaptable invasive species. With continued advances, researchers can hope that populations of SWD can be controlled and the damage they cause reduced.

Noxious weeds plague farmers and ranchers, push out native species, and cause both economic and ecological damage. Synthetic herbicides are often used to control the spread of these plants, however, some species have developed a resistance to these chemicals.

New techniques use radiation to eliminate dangerous mosquitoes. The Aedes aegypti mosquito is notorious for spreading dengue virus, yellow fever virus, chikungunya virus, and Zika virus, among other ailments. While many mosquitoes do not feed on people, or even domestic animals, this mosquito targets humans causing disease to millions of people throughout the world. ARS researchers with scientists from the University of Florida have developed a new technique for using radiation to control mosquito populations.

Thousands of invasive fish have been removed from the Chesapeake Bay watershed at the Conowingo Dam earlier this year and donated to local food banks through a continuing partnership between Maryland Department of Natural Resources and others. During the 2024 season, which ran from March to June, more than 18,000 pounds of invasive fish (blue catfish, flathead catfish, and northern snakehead) were removed from Maryland waters.

A tiny wasp may be the solution for managing an agricultural pest causing major economic damage to fruit, vegetable, and field crops in North America and Europe. Agricultural Research Service (ARS) scientists are currently studying Trissolcus japonicus, commonly known as the samurai wasp, to see if this parasitoid wasp is the right biological control agent for reducing brown marmorated stink bug (Halyomorpha halys) (BMSB) populations outside of Asia. Biological control is the process of reducing or mitigating pests or pathogens by using the pest’s or pathogen’s natural enemies. The samurai wasp is a known natural enemy for the BMSB in Asia, and researchers are understanding how it behaves in non-native environments.

Northern pike are native to Alaska, Canada, and much of the central and eastern continental United States. Genetic evidence reveals the role of human transport in the spread of invasive northern pike in the Columbia River basin.

Potatoes and oak trees don’t have a lot in common, but there is one thing, and it isn’t good – a fungal-like plant pathogen in the genus Phytophthora. One of the many invasive pathogens contained in this genus, P. infestans, was responsible for the Irish potato famine. Since the mid-1990s, though, Phytophthora has been attacking forest trees along the West Coast, with the pathogen P. ramorum, also known as "sudden oak death" (SOD). SOD was first detected in the San Francisco Bay Area; it has since spread throughout California. In 2001, SOD was discovered in southwest Oregon where it infected tanoaks trees. The discovery led to the formation of an interagency team that included researchers from the Agricultural Research Service (ARS) and Oregon State University (OSU), to develop strategies to mitigate the impacts of SOD.

Insects and diseases that are damaging and killing trees across the contiguous United States are reducing the ability of the nation's forests to capture and store climate-changing carbon dioxide, according to a new study. The study – published in the journal Frontiers in Forests and Global Change – found that forests damaged by insects sequestered 69% less carbon than undamaged forests. Those affected by disease sequestered 28% less carbon. In total, the study found that the damage currently being caused by insects and diseases across the contiguous US is reducing the sequestration potential of America’s forests by roughly 50 million tons of carbon dioxide each year – the equivalent of emissions from more than 10 million cars.

Tribal, state and local governments will join forces at Lake Roosevelt this week to combat the spread of northern pike, recently recorded just two dams away from critical Columbia River salmon habitat. “We are at a critical moment in time where northern pike have not spread into salmon habitat,” said Kelly Susewind, director of the Washington Department of Fish and Wildlife. “If northern pike move downstream, the State of Washington will consider this an environmental emergency. We need to work together to stop northern pike.”

The Administration announced a new interagency conservation agreement to protect western water supplies, power generation, outdoor recreation and aquatic ecosystems by strengthening efforts to combat invasive mussels.

A Memorandum of Understanding (MOU) among the U.S. Army Corps of Engineers, U.S. Department of Agriculture Forest Service, and six Department of the Interior bureaus focuses on boosting federal coordination, communication and collaboration to enhance the capacity of federal, state and tribal agencies to rapidly respond to discoveries of invasive mussels in western states.