Posts tagged Michigan

Emerald ash borer alert – new infestation found just miles from Iowa in Wisconsin

This came out today from the Iowa Department of Agriculture and Land Stewardship. Spokesman Dustin Vande Hoef said the emerald ash borer infestation discovered in Wisconsin – the closest its ever been to Iowa – appeared to be well-established. The best action Iowans can take to prevent an infestation – which most experts believe is only a matter of time – is to buy firewood locally and not bring it into the state from quarantined areas such as Michigan, where the emerald ash borer was first discovered in the United States and where the beetle has already decimated ash trees.

Here is the press release that came out today:

Emerald Ash Borer

Emerald Ash Borer

IOWA OFFICIALS HIGHLIGHT EFFORTS TO PREVENT AND DETECT EMERALD ASH BORER FOLLOWING NEW DISCOVERY IN WISCONSIN

New Infestation Discovered Across Mississippi River in Wisconsin

 

DES MOINES – Following the discovery of Emerald Ash Borer (EAB) just across the Mississippi River from the Iowa-Wisconsin border, members of the Iowa Emerald Ash Borer Team today highlighted steps being taken to prevent an infestation in Iowa and detect the beetle if it is in the state.  EAB is an invasive beetle that feeds on ash trees and eventually kills them.

 

The new infestation was found near Victory, Wis. on the east bank of the Mississippi River across from Allamakee County in Northeast Iowa. This new infestation is less than 5 miles southeast of the Minnesota-Iowa border.

 

The Iowa Emerald Ash Borer Team includes officials from the Iowa Department of Agriculture and Land Stewardship, Iowa State University Extension and the Iowa Department of Natural Resources, USDA Animal Plant Health Inspection Service (APHIS) and the USDA Forest Service

 

The Emerald Ash Borer (EAB) is native to the Orient, and was introduced in the United States near Detroit, Mich. in the 1990s.  Although not yet found in Iowa, EAB has more potential for future harm to Iowa forests and urban communities than any other insect currently being dealt with in the United States.

 

EAB kills all ash (Fraxinus) species by larval burrowing under the bark and eating the actively growing (cambium) layers of the trees. EAB has been killing trees of various sizes in neighborhoods and woodlands. Ash is one of the most abundant native tree species in North America, and has been heavily planted as a landscape tree in yards and other urban areas. According to recent sources, Iowa has an estimated 58 million rural ash trees and approximately 30 more million urban ash trees.

 

The movement of out-of-state firewood to and through Iowa poses the greatest threat to spread EAB.  Areas currently infested are under federal and state quarantines, but unknowing campers or others who transport firewood can spark an outbreak.

 

Each member of the Iowa Emerald Ash Borer Team is taking steps to monitor Iowa’s ash trees and ensure that the beetle has not spread into Iowa by examining high risk sites.  The Iowa EAB team has defined high risk sites as locations where people would bring out-of state wood, such as campgrounds, nurseries and sawmills.

 

DNR estimates there are up to as many as 5 million ash trees in Allamakee County, this represents about 5% of the trees in the forested areas of this county.  Allamakee is the most forested county in Iowa with 42% of the land covered by trees (176,000 acres of forest).  Iowa agencies in cooperation with USDA-APHIS and Forest Service will be working together to survey for EAB.

 

Monitoring efforts include visual surveys at high risk sites by Iowa State University, DNR’s placement of sentinel ash trees that are intentionally stressed so that they are more attractive to EAB, and the placement of purple sticky traps around the state that attracts and traps the insect by a collaborative effort among APHIS and the Iowa Department of Agriculture and Land Stewardship.

 

Team members will be working with Wisconsin and Minnesota officials in response to this new discovery and will be conducting additional visual surveys in the area in the coming weeks.

 

To learn more about EAB and other pests that are threatening Iowa’s tree population please visit www.IowaTreePests.com.

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Flood advice

Landscape designer and author Janet Macunovich, who will be keynote speaker at the upcoming Winter Gardening Fair at Kirkwood Community College in Cedar Rapids, wrote this advice in 2005 after she and her husband, garden photographer Steve Nikkila,  experienced flooding at their home in Michigan.  Janet passed this along as advice for Iowans who were flooded last year.  She writes: “Although it’s been a year since Cedar Rapids’ devastating flood, I am sure what’s in it is still applicable, as gardens can’t be the first thing we think about after such a disaster, and they take time.”


Special to those with flooded gardens.
I’m thinking this week about gardeners in the path of Hurricane Katrina who were fortunate enough to be spared flooding within their homes, or who cleaned up from minimal interior damage only to find that their yards were not similarly spared.

Three times in the last five years, my own yard has been under 18 inches to several feet of water that poured in from uphill areas when over-taxed storm drains failed. Luck the first time, and then fast sandbagging during subsequent floods, kept the water in our slab home to under a foot. Yet all the relief I felt after removing the interior mud disappeared when I realized how much debris, piled soil, displaced mulch and gullies had been deposited, plowed and cut by the force of so much water moving through my garden.

So my heart goes out to you who are recovering from flood or trying to help one of those gardeners reclaim their beds. I hope when you conquer the despair and the anger and start the reclamation that some of the following notes may make your work easier.

Use the triage approach of doctors working in disaster situations. Spend the time you have on the most important and permanent plants in your yard, even if it means losing some others. Rinse off evergreens so their needles and leaves can return to full photosynthetic power. Then they can produce enough energy to make internal repairs or grow roots to replace those lost to drowning. Pull soil away from the trunks of trees and shrubs. Banked soil traps moisture against the bark and can incite rot the plant will be unable to repair. Cut back water-battered shrubs, even if this means removing major limbs. Chances are such a plant will grow back much more quickly than you imagine but even if it revives slowly it will be at a better pace and to a better end than if you left it alone. That’s because a few clean cuts take less energy to seal over than dozens or hundreds of breaks.

If a large tree has shifted and is leaning, do not try to brace or straighten it. Call in an arborist and be prepared to hear you have to remove it. Submerged soil floats, removing the weight that was anchoring the tree’s surprisingly shallow pan of roots. Many trees topple in a hurricane not from wind but when water renders weightless the anchor that was counterbalancing the tree’s top. A tree that doesn’t fall but only leans may remain in that position once the water departs but it will never be as stable as it once was, and may be a serious hazard in the next storm. Nothing you can do to the trunk will change that.

Don’t scoop up and reuse mulch that floated and piled up wherever the water slowed in its path. That mulch is no longer an asset in weed control but a liability, since it is full of weed seeds that came with the water. Instead, gather and pile that mulch high enough (three feet or more) to make a hot compost. The heat of active composting will kill weed seeds.

Right now and for the next couple of seasons, be extra vigilant about applying and maintaining a mulch layer. Mulch over the mulch you already have, even if you would have waited until next spring to renew it. If you normally go without mulch during the growing season, it will be better to make a temporary change. Over years, your attention to your garden had reduced the number of weed seeds in the top layer of the soil, so weeding had become less of a chore. The flooded garden, however, has been loaded with seeds from other places. Some may be weed species brand new to your experience. Be ready for them — suppress them before they can start.

Don’t hesitate – cut down all herbaceous plants that were battered. It will simplify removing debris and shifting flood-piled soil. The cutback is unlikely to kill them when it comes this late in the season.

Before you start digging and raking, determine just how much soil was deposited over your perennials. Most can emerge successfully through about an inch of extra soil. Bulb plants can manage even when buried 3 or 4 inches deeper than before. Where a heavier layer of soil covered an area, consider keeping it as a raised bed. Dig up a few perennials, divide them and replant the area with those starts at the new level.

Resist the urge to use collected debris to fill gullies that were gouged by fast moving water. Where the water moved fast enough to scour and cut this time, it will move quickly if it comes again. Such areas need to be filled and tamped down using uniform, dense material such as sand and gravel that will make a smooth, heavy, low-friction surface. Water will slide past. In contrast, junk makes a loose fill that presents a myriad of edges to rushing water. That water will pluck things loose, quickly making depressions that will then become a new wash-out.

Include damage to paved surfaces in your damage report to FEMA. You may find some help in resurfacing not just the driveway, but walks or patios that crumbled and washed away when their bases flushed away.

Expect your reclamation to take years. Higher expectations can sap your soul. Accept that some things will die or need replacement, even though they survived the flood itself. Try to think in terms of opportunity to try new things, rather than dwelling on the losses.

Give yourself a view that will fuel your heart rather than your depression. Start your clean-up in an area close to your window or door, even if this makes no logistical sense. A sitting area is ideal. Bring that space back up to your old standard, even if that means letting chaos reign elsewhere a little longer. Each time you see that spot or sit with some comfort in it, you’ll feel better, and be better able to keep moving outward from that refuge.

 

Janet publishes a free weekly gardening newsletter based on questions people ask. She offered to answer anyone from this area who might want to know more after reading her flooded-garden advice.
You can reach Janet by email at:
JMaxGarden@aol.com

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