Invasive Plants & Insects in Forests

Finding New Hampshire's Magnificent Black Ash Tree
Tips for Identifying Ash
Tips for Identifying Ash Learn More
gypsy moths and egg masses, photo by Wisconsin Department of Natural Resources
Gypsy Moths in Rockingham County
Summer 2018 Update
Summer 2018 Update Learn More
sugar maples defoliated by forest tent caterpillar
Forest Tent Caterpillar Defoliation in the North Country
The forest tent caterpillar (Malacosoma disstria) (FTC) is a forest pest that is native to New Hampshire. It can be seen every year in the woods or on... Learn More
trunk injection treatment for emerald ash borer
When to Treat Your Ash Trees to Protect Against Emerald Ash Borer (EAB)
The short answer: it depends
The short answer: it depends Learn More
invasive plants tree of heaven and giant hogweed
Two Invasive Plants to Look Out For: Tree of Heaven and Giant Hogweed
One found in NH, One not yet in NH
One found in NH, One not yet in NH Learn More
Asian longhorned beetle adult, photo by Donald Duerr, USDA Forest Service, Bugwood.org
Asian Longhorned Beetle Pool Survey
Check your pool filters for invasive insects
Check your pool filters for invasive insects Learn More
Dr. Josef Gorres in the forest
UNH Extension Hosts Invasive Earthworm Expert in Portsmouth
The quick-moving, voracious “jumping worm” in N.H. gardens and forests and you can learn about it at a seminar on July 26
The quick-moving, voracious “jumping worm” in N.H. gardens and forests and you can learn about it at a seminar on July 26 Learn More
sample of firewood collected from out-of-state and a beetle that emerged from the firewood
Public comment period: Proposed updates to New Hampshire’s firewood quarantine
from Piera Siegert, state entomologist, N.H. Dept. of Agriculture, Markets & Food
from Piera Siegert, state entomologist, N.H. Dept. of Agriculture, Markets & Food Learn More
an emerald ash borer adult with its wings spread
Update on Emerald Ash Borer
The emerald ash borer (EAB) continues to spread. It has been found in more than 40 New Hampshire towns and was discovered this winter in Vermont. E... Learn More
a hemlock branch infested with hemlock woolly adelgid
What's New for Hemlocks
Landowners and natural resources professionals have spent many years worrying about the hemlock woolly adelgid. They have diligently looked for and re... Learn More