Alaska Forest Insects, Diseases & Invasive Plant Leaflets

Many insects and diseases damage trees in Alaska. Several invasive plants threaten forests and grasslands across the state. Click on the titles below for general and diagnostic information on some of the most common and damaging forest insects, diseases, invasive plants and noninfectious declines & disorders. We also have links to common damage agent webpages on our homepage with continually updated information. Please contact Steve Swenson (, 907-743-9456) to request hard copies of the following forest health leaflets. Below, we have included .pdf files of trifold leaflets for printing, web versions for online viewing, and .html files (text-only, no images) to improve accessibility. National Forest Insect & Disease Leaflets can be found here.




Invasive Plants