FOR MORE INFORMATION
An update on the status of Dutch Elm Disease and the American elm is at http://www.ars.usda.gov/is/AR/archive/jun06/elm0606.htm.
A great website for information on the emerald ash borer is Stop the Beetle! http://stopthebeetle.info/what-is-eab/. See signs and symptoms of EAB infestation at http://stopthebeetle.info/signs-symptoms/. Another very helpful site is emeraldashborer.info: http://www.emeraldashborer.info/index.cfm#sthash.LjQY85fb.dpbs. You can report EAB infestations on these sites or by phone: 1-800-292-3939 (Michigan), 1-800-462-2803 (Wisconsin), or 1-888-545-6684 (Minnesota).
The Beetle Buster site has everything you need to learn how to recognize and report the Asian longhorned beetle: http://beetlebusters.info/. Remember, there are other beetles that look similar to the ALB! You can see photos of these at http://www.uvm.edu/albeetle/identification/index.html.
This story about the loss of hemlock in the southeast is a must-read: The Last of the Giants: Documenting and saving the largest eastern hemlocks. http://www.americanforests.org/magazine/article/the-last-of-the-giants/.
Finally, there's an excellent 2006 leaflet by the US Forest Service about the effect the balsam woolly adelgid and its effect on fir trees, at http://www.na.fs.fed.us/pubs/fidls/bwa.pdf