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| Photo credit: Joe Boggs, The Ohio State University |
I came across this article today in the Forestry News. The same could be said for our state. Let's hope that doesn't happen. Pennsylvania’s
17 million acres of forests already are under attack by a variety of invasive
insects including gypsy moth, hemlock woolly adelgid, and emerald ash borer.
The Asian longhorned beetle is the next big threat, at least that we know of.
This large beetle, 1 ½ inches long, is shiny black with white spots. It prefers
many different species of hardwoods with maples being its favorite. To date, it has not been documented in
Pennsylvania. But, it has been found in Ohio,
Massachusetts, New York, New Jersey, Illinois and Toronto.
Now is a
great time of year to look for the insect as it is active in late summer to
early fall when the
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| Photo credit: Joe Boggs, The Ohio State University |
Video: The Asian Longhorned Beetle, Penn State Extension
Fact Sheet: The Asian Longhorned Beetle, Ohio State University Extension
It’s the
next great threat to Michigan’s hardwoods. Only up to 1 1/2 inches in length,
the Asian longhorned beetle is a big deal.
The shiny
black insect with white blotches spends much of its life eating through
hardwoods. It loves maples best but will settle for birch, elm, willow, buckeye
or a horse chestnut, making it a dangerous species for areas with trees, and
that’s 53 percent of Michigan. They’re not here yet, but they soon could be.
Forestry
experts and others are closely watching the advance of the exotic pest found in
Ohio, according to John Bedford, pest response program specialist with the
Michigan Department of Agriculture and Rural Development. “This beetle cannot
be allowed to enter Michigan,” he said. “The Asian longhorned beetle is our
poster child of invasive.”
The
six-legged beetle was discovered in 1996 in the United States after likely
being transported from Asia in wood-packing materials. Besides Ohio, it’s been
found in Massachusetts, New York, New Jersey, Illinois and Toronto. Bedford
said the beetle is presently confined to a 62-square-mile area east of
Cincinnati in Tate Township. It has damaged more than 97,000 trees in Ohio
alone.
According to
the Michigan Department of Natural Resources, the adults are active in late
summer to early fall when females chew depressions in tree trunks and branches
to lay eggs. When larvae hatch, they burrow deep into the tree, creating
chambers. The following summer, adult beetles emerge from trees by boring round
holes. Wood shavings can sometimes be seen near the holes in an infested tree’s
bark. The tree drops branches and dies 10-15 years later.
Bedford
notes the beetle does not move long distances on its own, but firewood
transportation provides an opportunity for it to spread. And the way to limit
the spread of the beetle is to destroy infested trees as “there is no good
treatment to eradicate this beetle.”
“Stock and
plantings are under quarantine, but if someone broke that, we’d have a major
problem as the beetle attacks hardwood forests, including all species of maple
trees,” he said. “It could do some serious damage to Michigan.”
Michigan is
on the lookout for the beetle and officials from federal to local governments
will act upon its presence by surveying and removing trees. Park rangers in
Michigan are surveying incoming vehicles carrying wood, while biologists set
pest traps and conduct aerial surveys in search of damage. “There will be a
rapid multi-agency response to any reports,” Bedford said.
Rhonda
Santos, a spokeswoman for the U.S. Department of Agriculture’s Animal &
Plant Health Inspection Services Division in Ohio, said eradication efforts by
destroying infested trees have been successful in impacted states. “Fortunately,
we have a window of opportunity: winter,” she said. “The cold slows the beetle,
and we can remove the infected trees and rid the area of the pest.”
Michigan’s
19.3 million acres of forest already are under attack by a variety of invasive
insects, and their damage affects the state’s forest industry and recreation.
The state park system, which includes more than 100 parks and recreation areas
covering 285,000 acres, has lost an estimated 500,000 trees since 2009,
according to state environmental officials.
The U.S.
Forest Service attributes 80 percent of invasive species impacting the state’s
forests to migration from identified sources. Invasive insects enter the state
in several ways, including infested wood-packing materials, firewood moved from
location to location, or through nursery stock, according to the DNR. All parks
offer for sale kiln-dried firewood from recognized vendors for use in the parks
to combat the movement of invasive species.
“We have
several insects or disease that can do serious damage to this resource,” said
Scott Robbins, director of the sustainable forestry initiative and forest
policy for the Michigan Forest Products Council. This damage impacts Michigan’s
forest industry, which is valued at $20.3 billion of economic activity each
year.
Since 2011,
the Forest Stewardship Program, Urban Forestry Program and DNR Forest Resources
Division Forest Health Programs have been working with non-federal public and
private landowners to prevent damage and restore damaged stands of trees.
Among the
most destructive species is the emerald ash borer. It was discovered in
southeastern Michigan in 2002 and has since killed an estimated 30 million ash
trees, Bedford said. “The borer is found in all but three Michigan counties, as
well as 25 states and two Canadian provinces,” he said.
A quarantine
is in place, but the insect has ravaged the state. Bug-resistant trees and
insecticides will help re-establish the species over time, according to the
DNR, U.S. Department of Agriculture, Michigan Tech and Michigan State
universities.
Beech bark
disease also has devastated beech trees in the eastern Upper Peninsula and
northern Lower Peninsula. First found in North America in 1890, the disease was
discovered in 2000 at the Ludington State Park and the Bass Lake State Forest
Campground near McMillan, according to the U.S. Fish and Wildlife Service. The
disease has since spread widely throughout Michigan. Triggered by a white scale
insect that feeds on sap under the tree’s bark, a fungus called nectria invades
tree and inhibits the flow of sap. Michigan has 7 million acres of
beech-containing forests.
Another
worrisome invasive disease is oak wilt, a fungal pathogen found in 46 of
Michigan’s 83 counties. The fungus moves through sap-feeding beetles and has
hit state parks especially hard, spread by carving initials in the trunk of oak
trees, pruning branches, or storm damage during summer months.
In 2001,
Michigan passed a quarantine prohibiting shipments of fir nursery stock and fir
timber products from states infested with hemlock woolly adelgid. The exotic
insect native to Asia has devastated stands of eastern hemlock in 11
northeastern states.
Forest
industry and environment expects hope the Asian longhorned beetle doesn’t join
these other invasive species in the state.
“Our concern
in Michigan is someone violating the quarantine could cause devastating damage
to Michigan’s forests,” Bedford said.
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