Diseased Tree Program

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Emerald ash borer
Oak wilt
Additional resources
Shoreview has a confirmed Emerald Ash Borer infestation.

Ellen Brenna, Natural Resources Coordinator

The City sponsors a shade tree management program, which seeks to promote a healthy urban forest. This program includes a treatment program for emerald ash borer, information for residents in diagnosing tree diseases, and a City tree sale to diversify our urban forest for future resiliency to other diseases.

To prepare for inevitable ash tree loss across the City and to diversify our tree canopy, the City offers an annual tree sale. This tree sale allows residents to purchase trees at wholesale prices. The order form is available in the winter months and trees are delivered by city crews in May. Keep an eye out for the March edition of the ShoreViews newsletter for the order form.

Emerald Ash Borer

Shoreview has a confirmed infestation of Emerald Ash Borer (EAB) and encourages residents to watch their ash trees for these Signs and Symptoms of EAB. The emerald ash borer beetle infests and kills ash trees by burrowing through the bark, essentially cutting off the tree's circulation. Ash trees have no natural resistance to the emerald ash borer and without preventative treatment, will ultimately become a victim. EAB is the only tree disease the City offers preventative treatment for. More information on Shoreview's emerald ash borer treatment program is available on our website.

If your ash tree is still healthy and you want to protect it from EAB, call the Natural Resources Coordinator to ask about our EAB treatment program. The program is available to Shoreview residents and businesses. Treatments last for 2 years and are done from late spring to early fall.

The City Council approved and adopted an Emerald Ash Borer Management Plan which guides the response to the infestation on public and private property. If you want more current information on emerald ash borer, check out the Minnesota Department of Agriculture website .

Oak Wilt

Are the leaves on your oak trees turning bronze and/or wilting? Does the crown look thinner than the rest of the tree? It could be Oak Wilt (OW), a common disease in urban areas. Report the suspect trees to the City for an inspection, or call a certified arborist (list can be found under Tree Trimmers tab). Oak wilt can spread from tree to tree rapidly, so catching it quickly can make a big difference in your neighborhood. To help manage for oak wilt, do not cut down or prune oak trees between April and November.

Learn More about Oak Wilt through the University of Minnesota Extension website. The Minnesota Department of Natural Resources offers more Oak Wilt information for dealing with an infestation. The City does not offer treatments for oak wilt.

Dutch Elm Disease

If leaves high in the crown of an elm tree yellow while brown leaves litter the lawn below, it could be dutch elm disease. Dutch Elm Disease (DED) is a fungal disease carried by beetles or passed between root systems. To help control the spread of DED, remove all dead or dying elm wood immediately and remove from the site. The City does not offer treatment for dutch elm disease.

Other Information

Are you asking “What’s wrong with my Tree?!?” Before hiring an arborist, consider checking out the University of Minnesota Extension’s Plant Diagnosis Guide. This guide includes a wide variety of information with excellent photos to help you identify what is wrong with your tree, also includes insect and weed identification.

Trees are living plants, and they are easily stressed out. Common signs of stress include pale coloration of leaves, slow growth, early leaf drop and the appearance of abnormally small leaves. Before assuming a tree is diseased, be sure to consider other factors that may have stressed it out. Common stressors in urban environments include nearby construction work, repaving of driveways, landscaping efforts, weather events (drought, storms, or strong winds), excessive pruning and road salt. Oftentimes, trees can recover from stress events with extra water and care.

If you suspect your tree is diseased or are concerned about its decline, please contact the Natural Resources Coordinator at the information listed above.