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The horticultural trade relies on healthy plants to flourish. However, its very nature
means that it is also a key pathway for the introduction and spread of plant pests and diseases.
European ash is a significant tree commercially, ecologically, and culturally. It is currently
threatened by two invasive species, the fungus that causes ash dieback and
Oak decline is a slow-acting disease complex that involves the interaction of biotic and abiotic factors such as climate, site quality and advancing tree age.
Interception of potential invasive species at ports-of-entry is essential for effective biosecurity
and biosurveillance programs. However, taxonomic assessment of the immature stages
This webinar was brought to you by the Natural Areas Association.
Presented by Sarah Wurzbacher, Forestry Extension Educator, Penn State University.
Ice or snow loads can cause branch breakage or failure of entire trees and shrubs. Branches or entire trees that fall in storms can impact homes, vehicles, power lines and block roads.
In August 2008, a dangerous pest, the nonnative, invasive Asian longhorned beetle, was discovered in Worcester County, Massachusetts.
EAB has become more prevalent in the northeastern U.S.
- Many exotic plant pests and pathogens are unknown prior to their establishment, making prevention and management difficult.
The invasive hemlock woolly adelgid (HWA) has decimated hemlock stands across much of the eastern United States, and presents a significant threat to all eastern hemlock in Canada across Ontario, Quebec, New Brunswick, Nova Scotia, and Prince Edward Isl