It may take some dedication on your part because BOB just doesn't go away so easily. It all starts with the roots. Hi Barbara, Thank you for your response. Bur Oak Blight Management. Bur Oak Blight is a fungal disease affecting the leaves of bur oak trees in Midwestern states. The symptoms of Bur Oak Blight might look similar to those found with other conditions of oak trees. Bur Oak Blight Management. Bur Oak Blight in the wintertime. 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. Mailng Address 605 Okoboji Avenue Milford, Ia, 51351. The edges of the tree have more leaves than the inner canopy. 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. However confirmation of bur oak blight should be done through a laboratory test before any treatment is done. 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). Bur Oak Blight is a fungal disease affecting the leaves of bur oak trees in Midwestern states. High value oaks Management may include injections of the fungicide propiconazole in late May or early June. 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. A bur oak infected with blight. Emerald Ash Borer. Bur Oak Blight should not be confused with Oak Wilt which is a completely different disease and nonexistent in New Ulm at this time. 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. The symptoms of Bur Oak Blight might look similar to those found with other conditions of oak trees. 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. BOB is characterized by wedge-shaped … Craig Wilson (712)332-1230 craigdwilson1968@gmail.com. CONTACT. The disease can begin gradually and build in severity until it kills the tree. Bur Oak Blight in the wintertime. 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. Barbara H. Replied April 17, 2018, 1:46 PM EDT. Hello, The fungal pathogen is Tubakia iowensis, commonly called bur oak blight (BOB). 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. Certified Arborist. There are five known Tubakia spp. We will have a certified diseased tree inspector look at it. that infect bur oak, but only this newly identified one causes severe leaf symptoms, including defoliation that can and does lead to the death of the trees. Healthy Roots Make For A Happy Tree. Bur Oak Blight In The Winter. Contact. 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