Elm trees are stunning and beautiful additions to any property. These tall, graceful trees are prized for their spreading crowns, but can fall victim to some common elm tree diseases. In this article, we will help you identify different types of elm tree diseases and determine the best course of action.
Dutch Elm Disease
Photo credit: William Jacobi, Colorado State University, Bugwood.org
Easily the most common (and most nefarious) elm tree disease is Dutch Elm Disease, which is caused by a fungus spread through elm bark beetles. You can spot this disease by looking for wilted, yellowing leaves that turn brown and fall off early. To prevent Dutch Elm Disease, avoid pruning your tree during the summer months when the beetles are active and sign up for a preventive treatment. If your tree is infected with Dutch Elm Disease, there is no treatment. Severely infected trees should be carefully removed and the resulting debris should be disposed of properly to avoid the spread of beetle larvae.
Photo Credit: Elizabeth Bush, Virginia Polytechnic Institute and State University, Bugwood.org
Leaf Spot
Like many other species, elm trees are also affected by leaf spot fungus. On elms, symptoms include small, dark spots on the leaves along with premature leaf drop. Luckily, leaf spot does not pose a serious health concern for healthy elm trees. To keep your elm trees healthy and reduce susceptibility to aesthetically concerning issues like leaf spot, sign up for a Bio-Stimulant service twice a year.
Cankers
Cankers are areas of dead bark on the tree’s branches caused by fungal pathogens. The cankers typically appear red in color. Cankers can eventually weaken the tree, leading to yellowing leaves. You may also notice fruiting bodies on the branches of your elm tree. To prevent cankers, avoid damaging the tree’s bark during pruning or other outdoor activities and keep your tree healthy overall.
Photo credit: William Jacobi, Colorado State University, Bugwood.org
Proactive steps are typically the best way to manage elm tree diseases. Regular, proper pruning, proper watering procedures, and Bio-Stimulants can all help keep your elm trees happy and healthy for years to come. If you have an elm tree you’d like to retain, the best practice is to treat preventatively for the highly aggressive Dutch Elm Disease (DED). Contact us today to save your elm tree before it’s too late!
