If you have questions about your Bur Oak or one somewhere else, please contact the City of New Ulm Engineering office at 507-359-8245. We will have a certified diseased tree inspector look at it. Repeated, and progressive disease development will weaken the tree and allow for secondary problems such as Two Lined Chestnut Borer, which may result in tree death. CONTACT. The disease can begin gradually and build in severity until it kills the tree. Barbara H. Replied April 17, 2018, 1:46 PM EDT. The symptoms of Bur Oak Blight might look similar to those found with other conditions of oak trees. Bur Oak Blight Management. Healthy Roots Make For A Happy Tree. Bur Oak Blight Management. It may take some dedication on your part because BOB just doesn't go away so easily. Bur Oak Blight is a fungal disease affecting the leaves of bur oak trees in Midwestern states. High value oaks A bur oak infected with blight. Tubakia and Bur Oak Blight Posted on November 24th, 2020 in Disease , Forestry , Forests and Street Trees , How To , Plants , Woodlands | No Comments » Purdue Landscape Report : Tubakia leaf spot, caused by the fungus Tubakia , is the disease we find more commonly on oak than any other. Hi Barbara, Thank you for your response. Bur Oak Blight (Tubakia iowensisi), or BOB, is a serious and progressive leaf disease that leads to the decline of certain Bur Oak (Quercus macrocarpa) trees. Sometimes it takes the scientists a little while to come up with a plan of action but they finally dicussesd what they want us to do. Craig Wilson (712)332-1230 craigdwilson1968@gmail.com. The edges of the tree have more leaves than the inner canopy. A common leafspot fungus, Tubakia dryina, was initially thought to be the cause of the blight on bur oak, but closer examination showed that the cause was a new species of Tubakia.With funding provided by the US Forest Service, we were able to show that there are five species of Tubakia that can infect bur oak, but only one species can cause dramatic leaf symptoms and tree mortality. Bur Oak Blight in the wintertime. Bur Oak Blight in the wintertime. A recent increase in questions from homeowners about sick oak trees have revealed their concerns about oak wilt.But another major disease that shows symptoms in August is bur oak blight or BOB.. BOB is specific to bur oaks, but not all bur oak trees get sick. Emerald Ash Borer. Contact. There are five known Tubakia spp. Management may include injections of the fungicide propiconazole in late May or early June. Although typical Tubakia leaf spots do not cause lasting damage to the tree, Tubakia iowensis, causal agent of bur oak blight (BOB), causes significant damage to bur oaks (Quercus macrocarpa) (Figure 8, 9, 10).Tubakia iowensis is reported to infect other oaks in the white oak group, but does not normally cause much damage (Figure 11, 12). The symptoms of Bur Oak Blight might look similar to those found with other conditions of oak trees. The disease can begin gradually and build in severity until it kills the tree. Bur Oak Blight is a fungal disease affecting the leaves of bur oak trees in Midwestern states. Certified Arborist. BOB is characterized by wedge-shaped … Hello, The fungal pathogen is Tubakia iowensis, commonly called bur oak blight (BOB). However confirmation of bur oak blight should be done through a laboratory test before any treatment is done. 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