Non-native, invasive insects have long been of concern to those who care about, and for, Connecticut’s trees. The list of these invaders is a list of many of the most serious biological threats to our trees and forests. This list would include the gypsy moth, chestnut blight, Dutch elm disease, Japanese beetle, elongate hemlock scale and the hemlock woolly adelgid.
Unfortunately, this list continues to grow, at what appears to be an increasing rate. Insects that have the potential to impact Connecticut’s trees include the Asian longhorned beetle, the emerald ash borer, the hemlock woolly adelgid and others.
Arborists, tree wardens and other tree care workers who are in the front line in tree care have shown that they can play an invaluable role in helping to prevent or contain infestations by being aware of these exotic problems, and by reporting possible findings of their occurrence as soon as they are noticed. This page is an attempt to assist in this effort by providing links to several of the organisms that have been identified as being of specific concern. Additional suggestions, either as to organisms to list or sites to visit, are welcome. Please contact the CTPA via e-mail.
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Common, Non-Native Invasive Insects
- Asian longhorned beetle
- emerald ash borer
- hemlock woolly adelgid*
- elongate hemlock scale*