Scientists & Staff

Dr. Jessie A. Glaeser (photo by T.J. Volk)

Jessie A. Glaeser

Notes: This person is no longer an employee of the Northern Research Station.

Featured Publications & Products

Publications & Products

National Research Highlights

Hawaii’s native forest, Oahu, Hawaii.

Team assesses invasive species threat to Hawaii and other U.S. ports of entry

Year: 2017

Introduced through pathways of international trade and tourism, invasive insects and pathogens can strike anywhere. The Hawaiian Islands are especially vulnerable due to their dependence on trade with foreign countries and the mainland. Forest Service researchers, working with the U.S. Forest Service Wood Import and Pest Risk Assessment Mitigation and Evaluation Team (WIPRAMET), evaluated the risk of introducing nonnative pests that could endanger native Hawaiian plants. Lessons from this analysis are applicable to other U.S. ports of entry.

Figure 1: Spores of Pseudogymnoascus destructans, magnified one thousand times.. Curved spores are the most characteristic, but they are often highly variable in shape.
Figure 2: Efficacy of 70 percent ethanol on spore survival. Top row: Growth after exposure to ethanol for 0, 0.3 and 1 minute.  Row 2: Growth after 5, 10 and 15 minutes.

Preventing human-based transmission of white-nose syndrome of bats.

Year: 2017

Over six million bats have died in eastern North America from white-nose syndrome since the disease was first observed in 2006. Forest Service scientists are looking for ways to slow the spread of the disease by finding better ways to clean the clothing and equipment that people bring into the caves.

DAME crystals on a smoldering mesquite tree in Alamo Canyon, ArizLaurence A. J. Garvie, Arizona State University

Wood Decay Fungus Forms Toxic Organohalogen Crystals in Mesquite

Year: 2015

A Forest Service scientist identified toxic organohalogen crystals formed by fungi in decaying mesquite. Charcoal production and forest fires in the Southwest could release significant quantities of this compound into the atmosphere.

Tree failure resulting in damage to house, Kennebunkport, ME. USDA Forest Service

Managing Wood Decay in the Urban Forest

Year: 2014

Arborists need tools to help identify patterns of wood decay as part of tree risk analysis and decisions on the proper care of urban and community trees. Forest Service scientists prepared a series of articles to introduce arborists to frequently encountered decay fungi and patterns of decay in common oak and riparian tree species.

Heterobasidion root rot in red pine. Jessie Glaeser, USDA Forest Service

Detection of Heterbasidion Root Disease Using Genetic Fingerprinting

Year: 2013

Heterobasidion root rot is a significant pathogen in the red pine plantations of the midwestern U.S. Little is known about its distribution. Forest Service scientists developed a DNA molecular test for field personnel to use in diagnosing the disease.

DNA Tool Detects White-Nose Syndrome Fungus in Bat Caves

Year: 2010

NRS scientists Daniel Lindner and Jessie Glaeser are collaborating with the USGS Wildlife Health Laboratory in Madison, WI, to characterize the distribution of G. destructans in cave sediment samples from bat hibernation sites in the eastern United States.

Living fungal cultures stored in liquid nitrogen in the CFMR culture collection (photo by S. Schmeiding, USFS). Examining specimens in the CFMR herbarium. S. Schmeiding, Forest Service

Web-enabled Database for Center for Forest Mycology Research Expanded

Year: 2010

The culture collection and herbarium maintained by the Center of Forest Mycology Research (CFMR) in Madison, Wisconsin is one of the largest fungal 'libraries' in the world. The collection specializes in fungi associated with wood and contains both living fungi and dried reference specimens, which are used by researchers world-wide in studying forest pathology, disturbance biology, fungal genetics, distribution of invasive species, and impact of climate change on forest ecosystems. The CFMR's web-enabled database, accessible at, has recently been enlarged and updated.

Last modified: Tuesday, August 18, 2015