Posts tagged ‘invasive species’
(Released by Minnesota DNR on September 3, 2009)
A draft Minnesota Statewide Invasive Species Management Plan (PDF) is now available for public review and comment until Sept. 22.
It is designed to provide a framework for addressing both aquatic and terrestrial invasive species issues in Minnesota.
The plan includes strategies and actions to address the main issues related to invasive species: prevention of new introductions into the state; early detection and rapid response to new introductions; containment of populations; and management of established populations to reduce their harm.
This draft plan reflects several years of work by many organizations from the local, state and federal government levels and a number of nongovernmental organizations.
“It will be a good framework for addressing the invasive species issue,” said Jay Rendall, DNR invasive species prevention coordinator. “However, we want to have more input on strategies and actions that could be taken in the future.”
Comments from individuals and organizations will be used to refine and expand the actions identified in the draft plan. When completed, the plan will also provide opportunities for improved coordination and partnerships between federal, state and local governments, tribes, conservation organizations and others working to minimize the impacts caused by invasive species in the state.
The draft plan and information about submitting comments is available on the DNR Web site. Printed copies can be requested by calling 651-259-5100. Written comments can be submitted in writing to Invasive Species Program, Minnesota DNR, 500 Lafayette Road, St. Paul, MN 55155, or by e-mail.
The following information was sent out by the Minnesota Department of Agriculture (MDA) on April 7. We’re developing information to help Minnesota woodland owners plan for the expected widespread ash mortality. Meantime, see the many links below and post your thoughts here or on the discussion board.
This discovery was made only last week and confirmation was made on Monday, April 6. The Wisconsin Departments of Agriculture and Natural Resources have released the news of this find today, April 7. Although Wisconsin has not had much opportunity to evaluate the scale of this infestation, their initial assessment was that this was a significant infestation.
Due to the proximity of this infestation to Minnesota and Iowa, it is possible that the infestation extends into one or both states. The Minnesota Department of Agriculture, along with our partners at the Department of Natural Resources, USDA APHIS Plant Protection and Quarantine and USDA Forest Service are already investigating the southeastern portion of Houston County to determine if the infestation extends into Minnesota. We expect these initial surveys to last up to four weeks. If emerald ash borer is found in Minnesota, we will activate our EAB Response Plan (PDF).
Whether or not this initial round of survey discovers EAB in Minnesota, we will be intensifying survey and outreach efforts in southeastern Minnesota during 2009.
The complete press release that is being issued in Minnesota is here. Some key points to remember about the situation are:
- EAB has not yet been found in Minnesota, but state and federal authorities are investigating the area.
- No quarantines have been established in Minnesota. A federal quarantine will be imposed in Wisconsin on the infested area.
- At this time we are asking the public to voluntarily not move ash wood out of Houston County. A quarantine could be placed on Houston County by Minnesota Department of Agriculture in the coming weeks.
- For Minnesota beyond Houston County the situation has not changed. People should be vigilant as to the condition of their trees and report suspected infestations to MDA. Movement of untreated firewood over long distances should be avoided in any part of the state.
If you have questions, please direct them to MDA’s Arrest the Pest hotline.
“Arrest the Pest” Hotline: 651-201-6684 – Metro Area or 1-888-545-6684 – Greater Minnesota. Or email Arrest.The.Pest@state.mn.us.
Watch MDA’s new 6-minute video on EAB:
More about Emerald Ash Borer:
- New: Get involved! EAB first detector training: Winona, MN April 28, 2009.
- EAB and the future of the Minnesota woods
- EAB prevention, detection, and rapid response
- EAB: Invader at our doorsteps. 6-minute video by MDA.
- Do I have Emerald Ash Borer? (PDF)
- Ash Tree ID (PDF)
- Native borers & look-alikes (PDF)
- EAB Signs & Symptoms (PDF)
- A Reference for Recognizing Insect Galleries in EAB Detection Trees in Minnesota (PDF: 3MB)
- Link to an August 2008 video news release about EAB
By Steve Katovich, US Forest Service, St Paul, with contributions from Mike Reichenbach, University of Minnesota Extension
In 2002, a small emerald green beetle native to Asia was found killing ash trees in the Detroit area. The beetle was given the common name “emerald ash borer” or EAB for short. It had apparently arrived on infested pallet wood or crating material, perhaps as far back as the early 1990’s. The infestation spread undetected for 10 years. Surveys in 2002 quickly confirmed a massive infestation with almost every ash tree in the Detroit metro area affected.
Since then, EAB populations have been found in 10 states and 2 Canadian provinces. Of greatest concern is the transport of infested firewood from Illinois, north of Milwaukee, and in the Upper Peninsula of Michigan. By transporting firewood, visitors from these areas could very easily initiate EAB outbreaks here in Minnesota. Beetles could also arrive on an infested nursery trees or perhaps in logs arriving at a mill.
EAB is a tremendous tree killer, and Minnesota woods include a huge ash component in both rural and urban forests. In fact, EAB is proving to be such an efficient killer that it seems likely that few ash trees will populate our landscape in the future.
At this time, the best strategy is to delay EAB’s arrival as long as possible. Given enough time, researchers may yet uncover some key tools that will even out the battle between the insect and ash trees. Homeowners can help. Firewood should be obtained and burned locally. It is not a good practice to transport firewood long distances. Even within Minnesota it would be prudent to avoid transporting firewood from the Twin Cities to a cabin or campground. The Michigan experience has shown a number of state wide campgrounds were infested with EAB, as a result of firewood transport.
Despite our best efforts, EAB will eventually arrive in Minnesota. It would be best if any new introductions were found early. Everyone is encouraged to report unusual ash tree mortality. Extensive woodpecker activity on ash trees can be a sign that EAB larvae are active under the bark. This is most easily observed in the late winter when bark flakes cover the snow and the stripped bark stands out against a white background.
Minnesota landowners with ash do not need to panic. It will likely be years before EAB begins to impact Minnesota forests. But, it might be wise to rethink long term management plans for stands that have an extensive ash component. Rather than waiting for EAB to arrive, some early stand intervention could reduce the risk of extensive tree mortality. The insect attacks both healthy and weak trees, there’s little that can be done to create resilient stands. Landowners can take advantage of management actions planned in their woodland to harvest trees before the insect reaches Minnesota. After the insect is in MN quarantines may make it difficult to transport harvested logs.
Consider enrolling as an EAB First Detector. Trainings are coming up throughout Minnesota this spring. Details on upcoming trainings are on our class calendar and the Minnesota Department of Agriculture’s EAB website.
If you think you may have EAB on your property or in your woodpile, immediately contact the Arrest the Pest hotline: 651-201-6684 in the Metro Area or 888-545-6684 in Greater Minnesota. You can also email Arrest.The.Pest@state.mn.us.
Update: September 2009
Emerald ash borer (EAB), an invasive species, threatens to kill Minnesota’s ash trees. In response, Andrew David, a University of Minnesota forest genetics researcher, and Mike Reichenbach, forestry educator with University of Minnesota Extension, began a project to protect the genetic diversity of ash in Minnesota.
Seed collected from wild-grown ash trees will be sent to one of three seed storage facilities in Colorado, Georgia or Iowa depending on the amount of seed collected. This seed collection effort is a proactive response to the presence of EAB in Minnesota and the upper Great Lakes region. This conservation effort will preserve the genetic variation for a future point in time when EAB can be controlled and ash species can be reintroduced to Minnesota using locally adapted seed sources.
How to collect and contribute seed
Ash seed has been ripening all summer and will be ready to pick when the seed cavity is completely filled and the seed coat is brown. Collection of seed typically begins about September 21st and can continue through much of the fall. Black ash seed is the hardest to collect because it is difficult to judge ripeness and the seed begins to fall with the leaves. The best time to collect black ash seed is from 1 week prior to leaf fall to approximately 2 weeks after all leaves have dropped.
In contrast green ash seed will remain on the tree for awhile after the leaves have fallen allowing collections into late fall. It will be easier to collect from trees before the seed is scattered by winds and rain. Persons wishing to collect seed should watch the ash seed collection webinar found listed under the webinars tab at http://forest.nrri.umn.edu/ash. The ash seed collection form can also be downloaded here.
Value of ash to Minnesota; ongoing threat of EAB
Minnesota is host to three species of ash: white ash, green ash and black ash. While white ash is an upland species found along the Mississippi River in southeast Minnesota; both black and green ash are common lowland hardwoods found throughout the majority of the state. Ecologically, black and green ash are the most important hardwoods in the lowland forest community. They represent 51 percent of the lowland hardwood cover type in Minnesota. Black ash is very important in native cultures as a source of wood for ash baskets. Both black and green ash provide a source of pallet, saw and veneer logs. All of Minnesota’s native ash species are threatened by EAB.
EAB was most likely introduced to the region when it was transported on wood packaging of an overseas shipment from Asia in 2002 to the Detroit, Michigan and Windsor, Ontario area. Within the United States the insect is most often transported on firewood. As of August, EAB has been found in Illinois, Indiana, Maryland, Michigan, Missouri, Ontario, Ohio, Pennsylvania and Wisconsin. It has been responsible for the death of over 20 million ash trees despite quarantines on moving nursery stock and firewood out of infected areas.
This conservation effort will preserve the genetic variation for a future point in time when EAB can be controlled and ash species can be reintroduced to Minnesota using locally adapted seed sources.
Click for much more information on emerald ash borer in Minnesota. To get involved in seed collection, contact Mike Reichenbach, (888) 241-0724, firstname.lastname@example.org; or Gary Wyatt, (888) 241-3214, email@example.com, both with University of Minnesota Extension.
Some of the most common invasive species in Minnesota’s woods include buckthorn, garlic mustard, Dutch elm disease and the emerald ash borer. Others that might not come to mind could be earthworms or Gypsy moths. All of these species are non-native and are causing significant damage in Minnesota’s forests. You can find identification guides to common invasive species at the DNR invasive species index.