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Forest Health

Diagnosing Sick Trees

If you have trees in your forest that are dying or already dead, the following websites and material may help you identify the culprit. Initially, you will need to be able to identify the species of tree that is affected, as many forest damaging insects and diseases are specific to particular host trees. You can learn to identify the trees on your property by downloading
Trees of Washington.

Once you know the tree species, you can move on to deduce the disease or identify the insect at the following web site:

On-line Catalog of Western Forest Insects and Diseases

Once you know the disease or insect, the following publications are useful:

Plant Disease Management Handbook

Insect Management Handbook

Other Helpful Web Sites


Forest health in Idaho

US Drought Monitor