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Common Pests of New Hampshire's Trees and Forests
The following is a collection of fact sheets for common insects and diseases of New Hampshire's trees and the forests of the Northeast. Insects and diseases can be searched in four different ways. Insects or diseases (both pests) can be identified by photograph under the Forest Pest category. Pests can be searched by tree species under the Forest Pest Host category. Pests can also be searched by the part of tree affected under the Tree Type and Part Affected category. Lastly, pest problems can be searched using a Keyword Search. If none of these assist you in identifying your pest problem you may submit samples to the
UNH Insect Identification Services
UNH Plant Disease & Diagnosis Services
1. Forest Pests
Find fact sheets for insects and diseases based on photos.
2. Forest Pest Hosts
Find fact sheets for insects and diseases by selecting the tree (host) affected.
Select a Tree
(trees that bear broad leaves)
Select a Tree
(trees that bear needles or scale-like leaves)
3. Tree Type and Part Affected
Find fact sheets for insects and diseases by selecting the type of tree and the part affected.
4. Keyword Search
Find fact sheets for insects and diseases by typing in a pest name or keyword.
This collection was produced by Jen Weimer as part of an independent study in Plant Biology at the University of New Hampshire with the collaboration of the University of New Hampshire Cooperative Extension Forestry and Wildlife Program.