What is the 2021 status of Emerald Ash Borer in Minnesota?
- EAB has been spreading across the metro area since 2009, but we are now reaching the peak impact when untreated trees are dying quickly. We are entering the uphill side of the “death curve.” The number of ash trees declining and the speed at which they are dying is accelerating. This is a crucial time for making a plan for your ash tree: have it protected this summer, or remove it before next spring.
- Tree crews that manage ash tree removals are extremely busy this summer. This includes city staff and private businesses.
- Ash trees that die must be removed quickly because they pose a safety risk.
- Stressors such as extreme heat, lack of rain, and environmental site conditions are killing trees of all species. Ash trees that have been treated are safe from EAB, but are still vulnerable to these health threats the same way all plant and tree species are. Proper tree care, including watering, is essential to keeping protected ash trees in top condition.
The results of different management strategies have become clear.
When making decisions about how to manage EAB, communities and homeowners took one of three approaches: remove ash trees, do nothing, or treat as many good quality ash trees as possible.
Treated ash trees continue to thrive after years of regular treatments. Dead / dying ash trees are easily spotted. Some cities chose to remove ash trees rather than have them protected.
Why treat ash trees now—isn’t it too late?
There are still healthy ash trees worth saving. Once a tree has suffered too much damage, treatments won’t save it. Fortunately, there are many healthy ash trees in every community that are still great candidates for being protected from EAB! As some communities have lost significant numbers of ash trees in recent years, the results of management strategies are becoming more clear.
If my ash tree needs to be removed, when should it be done?
If the tree is dead or poses a safety risk, have it removed as soon as possible. Otherwise, there are advantages to having it done in winter. It’s easier to contain the pest because adults aren’t flying and it’s easier on your landscape to have work done when it’s frozen. Finally, if the tree is still in relatively good condition you can enjoy one final summer’s worth of shade.
How do I pick the best replacement tree if my ash is removed?
Many factors determine the best tree choice, including the variety of trees in your neighborhood, and conditions in your yard. A certified arborist can examine your site and discuss your tree preferences to help you make the best choice. To get started, read our experts’ advice here!
What time of year do the borer insects spread to new trees?
Depending on spring weather, adult emerald ash borers usually begin to emerge in early summer. Adults generally fly from tree to tree seeking new food sources and places to lay eggs from May to September.
How does EAB spread?
Adult borers infest new ash trees and lay eggs under the tree’s bark. Once the larvae hatch, they feed on the layer of tissue beneath the bark, damaging the system used to transport water and nutrients and eventually killing the tree.
Rainbow Treecare can help you decide what’s right for your ash tree
Learn more about how Rainbow Treecare is committed to helping homeowners save our urban forest One Tree at a Time! As the number of trees impacted by Emerald Ash Borer in Minnesota continues to grow in 2021, knowing what is best for your ash tree can be a difficult decision to navigate. Rainbow Treecare can help. It’s our mission to protect as many ash trees from EAB as possible and to let our urban forest thrive. If you have questions about the 2021 effects of Emerald Ash Borer in Minnesota or are interested in our ash tree removal services, get in touch with us today.