Invasives in the News

January 5, 2016

MONTPELIER >> A new rule is being considered that would ban the transport of untreated firewood into the state of Vermont, in order to prevent the spread of invasive pests such as the Asian longhorned beetle and the emerald ash borer.

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December 21, 2015

"Miconia trees with their ginormous green and purple leaves are invading botanic gardens all around the world. While the plant is aesthetically pleasing, it is also called the "green cancer" for its ability to claim and overwhelm new territories, according to researchers from the University of Alcalá.

A recent study revealed 91 countries that are at risk of being colonized by these...

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December 17, 2015

The Scout Motto is the best advice for pest managers who want to establish a first line of defense against problematic invasive insects even before they become established, according to Dr. Surendra Dara, an IPM and crop advisor at the University of California.

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December 7, 2015

For some time there have been reports of “hot spots” of red pine mortality across our region.  An effort funded by the US Forest Service and led by a graduate student from UNH is looking into the situation and beginning to find some clues.  While the team continues to look at a variety of possible causal agents, one result of this research is that red pine scale (RPS) has been...

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December 7, 2015

Japanese knotweed (Fallopia japonica), native to Eastern Asia, was introduced to North America in the late 1800s as an ornamental plant. This plant is found in most U.S. states, and many countries worldwide, exhibiting invasive behavior outside of Asia*.

Japanese knotweed was identified in Vermont as early as the 1920s**. In the wake of Tropical Storm Irene, Vermont...

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December 3, 2015

For years, Didymosphenia geminata (Didymo, for short) has been on many states’ high-priority aquatic invasive species lists. Didymo, a freshwater diatom, has the potential to form dense mats on stream and river bottoms, making...

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December 1, 2015

Clint McFarland didn’t want to believe the pictures he was looking at on his smartphone.
A Worcester, Mass., neighborhood before ALB-infested tree removal

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November 23, 2015

"BOISE, Idaho — 

Finding a way to stop fire-prone cheatgrass and other invasive species is unavoidable if sagebrush ecosystems in the West are to remain viable for native plants and animals, experts say.

More than 200 federal and state land managers and scientists trying to figure out how to do that took part in the three-day 2015 Western Invasive Weed Summit that wrapped up...

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November 19, 2015

"Going for a walk the other day along a public trail I was struck by the number of invasive shrubs I saw. Most trees and shrubs have shed their leaves, but burning bush (Euonymus alatus), Japanese barberry (Berberis thunbergii) and honeysuckle (Lonicera spp.) still have leaves on their branches. Holding leaves and producing food by photosynthesis gives them extra energy to take over the world...

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October 27, 2015

By DIANE BRONCACCIO

SHELBURNE CENTER, Massachusetts — It was only a year ago that Norman and Lisa Davenport first noticed sunlight flickering through the once-dense shade of a stand of hemlocks on their hilltop farmland.

And now those first trees look more like utility poles than conifers.

As the twin evils of elongate hemlock scale and hemlock woolly adelgid spread...

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October 20, 2015

Over 30 participants attended the recent 4th Annual Vermont Tree Stewards Conference to explore that question and many more on how to keep our trees and communities healthy. Held at the historic Holly Hall in Bristol, this conference provided an educational and networking opportunity for the stewards of Vermont's urban trees and community forests.

Patrick Olstad, Landscape Architect...

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October 14, 2015

In New England, right around the start of autumn, many folks begin to adorn their front doors, fences, and yards with seasonal decorations. Pumpkins, bales of hay, stalks of corn, and a staple in the seasonal traditions, bittersweet. Wreathes and sprigs of these beautiful berries are sold along country roads, and at farmers markets, and are a tempting natural décor option. This plant is...

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October 12, 2015

The winter of 2014-2015 was tough on hemlock woolly adelgid; 97 to 99 percent of the sistens, or winter, generation died.  The previous winter had similar winter mortality rates.  This helped to give hemlock trees a bit of a reprieve.  But, while these recent mortality rates have been high enough to temporarily stop the spread of HWA, the trees are still...

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October 5, 2015

By Mark Wedel
 

Vic Bogosian has an 18,000-strong army--or, rather, air-force--of wasps, and he's looking for more draftees. They're fighting an enemy of the Pokagon Band of Potawatomi, the emerald ash borer, an invasive species from China that has been wiping out an important part of Michigan's Native American culture, the ash tree.

"The bugs here yet?" the...

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October 1, 2015

"Students and faculty managing the Ithaca College Natural Lands are in the process of removing what they hope is the last of an invasive species of plant known as Japanese stiltgrass after six years of sustained eradication efforts. On Sept. 26, the group cleared out a majority of the remaining stiltgrass.

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