Invasive Plants & Insects

autumn olive
Can invasive species be beneficial for wildlife?
A Question of the Week
A Question of the Week Learn More
japanese knotweed in bloom
When is the best time to control Japanese knotweed?
A Question of the Week
A Question of the Week Learn More
Purple Loosestrife
Invasive in the Spotlight: Purple Loosestrife
A beautiful menace in wetland habitats
A beautiful menace in wetland habitats 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
Northern spicebush (Lindera benzoin) in bloom
Planting Native Shrubs For Privacy and Wildlife
A Question of the Week: Can you suggest a native shrub that would make a good privacy screen and also provide food for wildlife?
A Question of the Week: Can you suggest a native shrub that would make a good privacy screen and also provide food for wildlife? Learn More
Autumn olive fruit
Invasive in the Spotlight: Autumn Olive
How to control the invasive shrub species taking over New Hampshire natural areas
How to control the invasive shrub species taking over New Hampshire natural areas Learn More
Swallow-wort (Cynanchum sp.)
Invasive in the Spotlight: Swallow-wort
How to control the "dog-strangling vine" taking over your yard
How to control the "dog-strangling vine" taking over your yard Learn More
Lily leaf beetles
What can I do to protect my lilies from lily leaf beetles?
A Question of the Week
A Question of the Week Learn More
Japanese Knotweed (Reynoutria japonica)
Invasive in the Spotlight: Japanese Knotweed
Japanese Knotweed (Reynoutria japonica) is an extremely fast growing invasive herbaceous plant in the buckwheat family (Polygonaceae). Native to ... Learn More
Bittersweet climbing over native trees and shrubs. Photo by Kristin Prince.
Invasive in the Spotlight: Oriental Bittersweet
Oriental Bittersweet (Celastrus orbiculatus) is a deciduous, woody, perennial vine native to China, Japan and Korea, that was brought to this country ... Learn More