Many have commonly believed that more diverse habitats are less likely to be invaded by exotic plants since ecological niches are occupied by species already present. Recent evidence shows that invasibility is a much more complex issue and may be …
Preventing Forest Tree Illness

Do not wait to act on insect and disease issues until after you see dead branches. Look for visible symptoms or signs of tree illness …
Invasive Species in Forests
Invasive Forest Plants
On October 2, 2015, this content was automatically unpublished and marked as inactive. Please feel free to rework this page, along with properly indicating the copyright for all included images and republish it as appropriate.
Do not hesitate to Contact
A Regional View of Invasive Plants
How does what I do in my yard, on my land and in my garden affect what plants invade our forests and grasslands? What has happened on the land where you live (its history of use), and what you plant …
Oak Decline
Written by D.J. Moorehead and G.K. Douce for Forest Encyclopedia Network
Causal Agents
Oak decline is the name given to a slow-acting disease complex stemming from interactions between biotic and abiotic stressors of oaks (Quercus spp.). Abiotic factors …
Sudden Oak Death in the Eastern United States
Adapted from: D.J. Moorhead and G.K. Douce for Forest Encyclopedia Network
Sudden oak death, caused by the pathogen Phytophthora ramorum, is a potentially devastating disease. P. ramorum has been found in nurseries in California, Oregon, Washington, and British Columbia,
Purple Loosestrife-Lythrum salicaria
Written by D.J. Moorhead and G.K. Douce for Forest Encyclopedia Network
… Oriental Bittersweet-Celastrus orbiculatus
Written by D.J. Moorhead and G.K. Douce for Forest Encyclopedia Network
…Kudzu-Pueraria montana (Lour.) Merr.
Adapted from: D.J. Moorhead and G.K. Douce for Forest Encyclopedia Network
Kudzu is a climbing deciduous vine capable of reach lengths of …