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Tag Archive | "Asian longhorned beetle"

State urges travelers to leave firewood at home


Perfectly round exit holes, just smaller than a dime, in tree limbs and trunks can be a sign of Asian longhorned beetle infestation. Photo courtesy of Joe Boggs, Ohio State University, Bugwood.org.

Perfectly round exit holes, just smaller than a dime, in tree limbs and trunks can be a sign of Asian longhorned beetle infestation. Photo courtesy of Joe Boggs, Ohio State University, Bugwood.org.

As the summer travel season begins, the Michigan departments of Agriculture and Rural Development and Natural Resources remind vacationers to leave firewood at home to prevent the spread of invasive tree insects and diseases.

Hauling firewood from one part of the state to another is a common way for these destructive pests to move to new locations, which could be devastating to Michigan’s native trees. The emerald ash borer already has wiped out millions of ash trees across the state. High-impact diseases, including oak wilt and beech bark disease, now are making their way through Michigan – often helped by travelers with trunkloads of wood harboring unseen fungi that can spread to healthy trees in new areas.

The fungus that causes oak wilt is visible under the bark of this split log.

The fungus that causes oak wilt is visible under the bark of this split log.

“Visual inspection does not always reveal disease or insect damage in wood,” said Gina Alessandri, MDARD’s Pesticide and Plant Pest Management Division director. “Disease may be in an early stage, and insect larvae can be hidden under bark. The safest choice is to burn firewood at or near the location it was harvested.”

Travelers are encouraged to buy firewood at their destination, burn it all on-site and not take it home or to their next destination. In most public and private campgrounds, firewood is available on the premises or from nearby firewood vendors.

It is a good idea to purchase firewood within a short distance of where it will be used. For ease in finding a local vendor, use www.firewoodscout.org. For day trips that include a cookout, bring charcoal or a cook-stove instead of firewood.

In- and out-of-state quarantines limit movement of regulated wood items to prevent the spread of invasive species and tree diseases. In Michigan, it is illegal to transport hardwood firewood in violation of the MDARD EAB Quarantine.

“It’s recommended that travelers do a little firewood homework before their trip,” said Jason Fleming, chief of the Resource Management Section in the DNR Parks and Recreation Division. “Many out-of-state visitors live in areas under quarantine for pests such as thousand cankers disease or Asian longhorned beetle, and it is illegal to move any regulated items (including items such as firewood and wood chips) from quarantined zones out of those states and into Michigan.”

Quarantines for Asian longhorned beetle include areas of New York, Massachusetts and Ohio. The Asian longhorned beetle is not known to be in Michigan, but the public is asked to look for signs of this invasive beetle, including round, 3/8-inch-diameter exit holes in tree trunks or limbs. Asian longhorned beetle larvae feed on a wide variety of tree species including maple, birch, elm, willow, buckeye, horse chestnut and other hardwoods. The damage caused by Asian longhorned beetles ultimately will destroy an infested tree.

Anyone observing an actual beetle or a tree that appears to be damaged is asked to report it. If possible, capture the beetle in a jar, take photos, record the location, and report it as soon as possible through the U.S. Department of Agriculture’s Asian longhorned beetle website, www.asianlonghornedbeetle.com or contact MDARD at 800-292-3939 or MDA-info@michigan.gov.

More information on the Asian longhorned beetle and other invasive forest insects and tree diseases can be found at www.michigan.gov/invasivespecies. Select the “take action” tab to learn more ways to avoid transporting invasive species during the recreation and travel season.

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Check trees for Asian longhorned beetle


Adult Beetle—Large black beetles with white spots on wing covers; antennae have a white band at the base of each segment. Photo courtesy US Forest Service.

Adult Beetle—Large black beetles with white spots on wing covers; antennae have a white band at the base of each segment. Photo courtesy US Forest Service.

August is national tree check month, which makes it a great time for Michiganders and travelers alike to be on the lookout for invasive, destructive pests threatening the state’s forest landscape. The Michigan departments of Agriculture and Rural Development, Environmental Quality and Natural Resources, along with the U.S Department of Agriculture, are asking people to take time out this month to examine trees for signs of Asian longhorned beetle, a highly destructive invasive pest.

Take just 10 minutes this month to check trees around homes for Asian longhorned beetle or any signs of the damage it causes. Out for a stroll? Look for signs around the neighborhood, at local parks and favorite recreation spots. Early detection and response are vital to protecting Michigan’s trees.

Dead Tree—Box elder killed by Asian Longhorned Beetle (ALB). Bark has fallen off, revealing larval galleries and exit holes. Photo courtesy US Forest Service.

Dead Tree—Box elder killed by Asian Longhorned Beetle (ALB). Bark has fallen off, revealing larval galleries and exit holes. Photo courtesy US Forest Service.

Adult Asian longhorned beetles are distinctively large, ranging from three-quarters of an inch to 1 and one-half inches in length, not including their long antennae. The beetles are shiny black, with random white blotches or spots, and their antennae have alternating black and white segments. They have six legs that can be black or partly blue, with blue coloration sometimes extending to their feet. The Asian longhorned beetle was first identified in the United States in 1996, likely transported from Asia in wood packing materials. Like the emerald ash borer, the Asian longhorned beetle spends most of its life cycle eating its way through the insides of trees. What makes ALB much more dangerous is that it feeds on a wide variety of tree species. Its first choice is maple, but it also will infest birch, elm, willow, buckeye, horse chestnut and other hardwoods. The damage caused by Asian longhorned beetles ultimately will destroy an infested tree. Adult beetles are active in late summer to early fall. During that brief window, beetles may be seen and some of the telltale signs of infestation may be more noticeable. Female beetles chew oval depressions in which they lay eggs. When larvae hatch, they burrow deep into the heartwood of the tree where insecticides can’t reach, creating large chambers in the wood. The next summer, fully formed adult beetles emerge from trees by boring perfectly round, three-eighths-inch-diameter exit holes. Sometimes a material resembling wood shavings can be seen at or below these holes or coming from cracks in an infested tree’s bark. Once a tree is infested, it must be removed. To date, there are no known infestations of Asian longhorned beetle in Michigan. However, the beetle has been found in areas of Ohio, Massachusetts, New York, New Jersey, Illinois and Ontario (Toronto). “Though the beetle does not move long distances on its own, it can be transported in firewood,” said John Bedford, Pest Response Program specialist at the Michigan Department of Agriculture and Rural Development. “When traveling, leave your firewood at home. Buy it at your destination point and burn it there.”

Anyone observing an actual beetle or a tree that appears to be damaged is asked to report it. If possible, capture the beetle in a jar, take photos, record the location, and report it as soon as possible through the USDA’s Asian longhorned beetle website, www.asianlonghornedbeetle.com or contact MDARD at 800-292-3939 or MDA-info@michigan.gov.

MDARD’s Asian longhorned beetle Web page provides more information and photos to help identify the beetles and signs of the damage they cause to trees.

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