Trees and Shrubs - Problems - University of Maryland Extension eXtension news
Agrosecurity - Plants - University of Maryland Extension eXtension news
Northeastern Invasive Plants Directory - USDA Forest Service
"Invasive Species" by Nevin Dawson, Forest Stewardship Educator - University of Maryland Extension (Previously published in The Delmarva Farmer)
Landscape Problem Solver Web Site - University of Maryland's Home and Garden Information Center
Invasive Species - University of Maryland's Home and Garden Information Center
Invasive Plant Control in MD - University of Maryland's Home and Garden Information Center Mimeo #HG88
IPM Series - Pine - University of Maryland's Home and Garden Information Center
IPM Series - Shade Trees - University of Maryland's Home and Garden Information Center
Maryland Invasive and Exotic Species - Maryland Department of Natural Resources
Noxious Weeds in Maryland - Maryland Department of Agriculture