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 Arthropod Identification Center or the UNH Plant Diagnostic Lab.

Forest Pests

Find fact sheets for insects and diseases based on photos.

• Insects
• Diseases

Forest Pest Hosts

Find fact sheets for insects and diseases by selecting the tree (host) affected.

• Apple Ash Aspen Basswood Beech Birch Black Gum Butternut Catalpa Cherry Elm Hickory Horsechestnut Maple Oak Select a Tree  Hardwoods (trees that bear broad leaves)
  
  
• Arborvitae Fir Hemlock Pine Spruce Select a Tree   Softwoods (trees that bear needles or scale-like leaves)
  

Tree Type and Part Affected

Find fact sheets for insects and diseases by selecting the type of tree and the part affected.

Keyword Search
Find fact sheets for insects and diseases by typing in a pest name or keyword.