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Balsam Woolly Adelgid

Started by Ron Scott, June 30, 2014, 05:43:53 PM

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Ron Scott

RE:  BWA QUARANTINE

For immediate release:  30 June 2014
Media contact: Jennifer Holton, 517-284-5724 or holtonj@michigan.gov

LANSING – Today, the Michigan Department of Agriculture and Rural Development (MDARD) established a quarantine to protect the state's nearly 14 million fir trees from balsam woolly adelgid (BWA), an exotic pest which has caused the death of millions of fir trees in North America.

Balsam woolly adelgid is a sap-feeding insect that attacks true fir trees, including balsam fir and Fraser fir.  Repeated attacks by the pest weaken trees, cause twig gouting, kill branches, and eventually kills the tree. Small (less than 1/32nd of an inch) purplish-black adult BWA form white, waxy "wool," that covers twigs, branches and stems of infested trees. Smaller, amber-colored crawlers hatch in mid-summer, which is when the risk of spreading the insect by wind and wildlife is highest.

"While we don't have BWA in Michigan, it could be introduced into the state's landscape in a number of ways, including on infested nursery stock, firewood, logs and vehicles and then spread by wind, birds and other animals which can carry it for miles. And, once it's here, it's difficult to detect and eradicate," said MDARD Director Jamie Clover Adams. "This pre-emptive quarantine is designed to prevent the massive losses of native firs that have occurred in other states due to the balsam woolly adelgid. We don't want to see places like Tahquamenon Falls or the Pictured Rocks lakeshore suffer loss of thousands of fir trees that grow there, as has occurred in the scenic Appalachian Mountains."

According to the United States Department of Agriculture Forest Service, BWA was accidently introduced into Maine in 1908 from Europe. It now infests firs in southern Canada, the Pacific Northwest, and the northeastern United States. In the eastern United States, vast stands of Fraser and balsam fir have been killed, with serious negative impacts on timber and Christmas tree industries. For example, in the Great Smoky Mountains National Park, 95 percent of Fraser fir has been killed by BWA.

The BWA quarantine generally prohibits the shipment of fir nursery stock and fir timber products into Michigan from infested states. Certain low-risk fir products are exempt, including Christmas trees and wreaths and heat-treated timber products.  The quarantine also allows fir seedlings grown under an active pest management program to be shipped into Michigan.

"If BWA were to become established in Michigan it could cause severe losses across multiple industries, including timber products, Christmas trees, nursery stock and tourism.  This quarantine is designed to help keep BWA from entering Michigan from areas where it has already become established," said Clover Adams.

Additional information about the BWA quarantine is available at www.michigan.gov/mdard. For more information on BWA, go to  http://michigan.gov/exoticpests or www.michigan.gov/invasivespecies

~Ron

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