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See also: Noxious Weeds Program Risk Assessments for more species

Agricultural Research Service (ARS) and the Weed Science Society of America (WSSA) are co-hosting 10 webinars on weed science and research, with a focus on impacts from weeds and invasive plants.

Beginning April 5, weekly presentations will be given by ARS weed science research experts. The webinars will occur every Tuesday from 2-3p.m. Eastern Time (ET) and include an interactive Q&A session. The webinar series is open to the public. Webinars are recorded and available to view on demand.
See also: USDA-Agricultural Research Service and Weed Science Society of America Collaborate to Present Weed Science Webinar Series (Mar 28, 2022)

Includes final annual and cumulative maps and data from 1999 to 2024.

A chance discovery in an Ohio woodland has turned into a multi-disciplinary, multi-agency, and multi-national effort to piece together a puzzle and understand a scourge that is killing trees by the thousands in northern states east of the Great Plains. The leaves of young beech trees are failing somehow. Scientists have figured out what causes the malady; it’s the 'how' that has them scratching their heads. Beech trees are one of the most common trees in America's northern and northeastern forests. Their nut crop feeds birds and other animals, and its wood is prized for bentwood furniture. The symptoms of beech leaf disease were plain to see – sunken dark spots on the leaves, which eventually died – but opinions differed on the cause. Was it bacterial, fungal, or viral? Then, a plant pathologist working for the State of Ohio noticed wiggly things in the leaf lesions. They turned out to be nematodes, microscopic worms that live in the soil, that had somehow managed to make it to the tree canopy 40-50 feet above ground. Nematode samples were sent to Beltsville, MD, for analysis and identification at the Agricultural Research Service (ARS) Mycology and Nematology Genetic Diversity and Biology Laboratory in Beltsville, MD. The nematode, Litylenchus crenatae, turned out to be native to Japan – the first population of L. crenatae found in the Western Hemisphere. The curious thing is that it's not a tree-killer in Japan.

WHISPers, a Wildlife Health Information Sharing Partnership event reporting system with current and historic information on wildlife morbidity or mortality events in North America. Events typically involve five or more sick or dead wild animals observed in the same general location and time period. This information is collected opportunistically and provided here by multiple State, Federal, and other agencies to enhance collective understanding of disease in wildlife populations.

Wildlife researchers have confirmed the presence of white-nose syndrome (WNS) in bats at Devils Tower National Monument. While this is the first confirmation of WNS in the state, the fungus that causes WNS, Pseudogymnoascus destructans (Pd), was potentially detected in southeast Wyoming as early as 2018. Biologists from the University of Wyoming discovered evidence of WNS during surveys completed in early May 2021, when they captured and sampled bats to test for the fungus.

The NPS will be working closely with the climbing community at Devils Tower to better understand and develop guidance for climbers to help care for and protect Wyoming’s bat populations – including how to safely clean and disinfect climbing gear. Climbers and cavers who have used gear or clothing in WNS-infected areas should not re-use them in areas not already known to have Pd fungus. If you see a sick or dead bat, report it to park rangers or Game and Fish biologists, but do not touch or pick up the bat.

Science conducted by the USGS and the White-nose Syndrome (WNS) Response Team. Our scientists are tracking the fungus as it spreads and characterizing the effects of WNS on hibernating bat populations in North America.

White-nose syndrome has killed over 90% of northern long-eared, little brown and tri-colored bat populations in fewer than 10 years, according to a new study published in Conservation Biology. Researchers also noted declines in Indiana bat and big brown bat populations. The findings, detailed in "The scope and severity of white-nose syndrome on hibernating bats in North America," underscore the devastating impacts of the deadly fungal disease. The research tapped into the most comprehensive data set on North American bat populations to date, which includes data from over 200 locations in 27 states and two Canadian provinces.

See the current Spread Map from August 1, 2025, and the states and provinces where WNS has been confirmed.

This page displays results from samples collected as part of the USDA, Wildlife Service, National Wildlife Disease Program's wild bird surveillance program. Sample collection from other entities (State agencies, Dept of Interior, private wildlife facilities) are not included.
See related resource: Data Visualization Tools to explore plant and animal health management data and interactive story maps

This state-of-knowledge review of information on relationships between wildland fire and nonnative invasive plants can assist fire managers and other land managers concerned with prevention, detection, and eradication or control of nonnative invasive plants. The 16 chapters in this volume synthesize ecological and botanical principles regarding relationships between wildland fire and nonnative invasive plants, identify the nonnative invasive species currently of greatest concern in major bioregions of the United States, and describe emerging fire-invasive issues in each bioregion and throughout the nation. This volume can help increase understanding of plant invasions and fire and can be used in fire management and ecosystem-based management planning.