Alaska Forest Insects, Diseases & Invasive Plant Leaflets

Many insects and diseases affect trees in Alaska. These invasive plants are threatening forests and woodlands in different regions of the state.  Click on the titles below for general and diagnostic informatiom on some of the most common tree problems. Hard copies of the forest insect and disease leaflets (FIDL) can be obtained from: Steve Swenson, Forest Health Protection, USDA Forest Service, S&PF, 161 East 1st Avenue, Door 8, Anchorage, AK 99501, or by e-mail requests at:




Invasive Plants