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Sycamore Anthracnose. Trees and shrubs that are prone to anthracnose include maple, camellia, walnut, ash, azalea, oak and sycamore. Pruning can help you shape the tree to look a certain way. The leaves are curled up and in some places, the major leaf veins are brown (necrotic). The most dangerous of the diseases of sycamore trees is anthracnose, also called leaf and twig blight.It can kill American sycamore, although it does only minor damage to other varieties. A succeeding flush of leaves will appear during the summer. The first symptoms appear on young leaves as they unfold. Sycamore anthracnose is a fungal disease that can cause leaf drop, twig dieback, cankers and the sudden death of more than 90% of a tree’s new shoot growth. Anthracnose on Sycamore I have received a lot of calls in regards to sickly looking sycamore trees. Meanwhile the fungal pathogen can grow further and kill dormant buds. Thanks to the cool, wet spring we had, anthracnose has made an appearance in our area. You can help to prevent this disease if you do not water them overhead. The severity of infection is directly related to weather conditions as leaves emerge. The Pacific dogwood tree is susceptible to a form of anthracnose. While anthracnose in and of itself does not kill a tree, it weakens the tree which allows other insects or diseases to attack the tree more readily. Optimum conditions for growth. Even though seriously defoliated during May and June, trees live through the disease. June-July the browning of leaves begins, although tolerable . While anthracnose may cause extensive defoliation, it does not cause serious harm to healthy, well-established trees. Diseases of Sycamore Trees. It has large lobed maple-like leaves. Anthracnose does not typically kill trees. Believed to be native to the United States, it is found throughout the range of sycamores. How Do You Treat Anthracnose? This happens because fewer leaves on the tree means it is not producing enough energy to make the auxins and other chemicals needed for tree defense. Conditions were perfect in spring 2013 for a severe outbreak of sycamore anthracnose, caused by the fungus Apiognomonia veneta (say that three times!). Anthracnose (leaf blight) is a fungus that winters on twig tissue on the tree. These cankers can spread to larger branches, or even the trunk in some cases. My best guess was anthracnose. Tomato anthracnose is caused by Colletotrichum coccodes, as an example. Save For Later Print. Dispose of fallen foliage to prevent the spread of the disease and prune back any diseased branches. To confirm, I was expecting to see damaged leaves as shown by Iowa State and re-growth of newer leaves that would be unaffected as the temperatures had risen enough to supress anthracnose. The disease is enhanced by cool, wet conditions. The ends of twigs may be killed back 8 to 10 inches. The fungus spreads from infected to healthy trees as spores carried by the wind or rain. Shade trees commonly affected by anthracnose are ash, dogwood, elm, hickory, maple, oak, sycamore, and walnut. Symptoms of sycamore anthracnose normally develop as small spots or dead areas centered along the veins of leaves or along leaf margins (Figure 2). On sycamore trees, anthracnose lesions typically develop along major leaf veins. Anthracnose On Shade Trees; Anthracnose On Shade Trees. Usually sycamore anthracnose does not kill trees; on occasion a nursery tree will die. Sycamore trees are a beautiful addition to any yard, but Sycamore tree fungus can quickly turn a nice tree into a major problem. Anthracnose is a fungal disease. How to Inject Fungicide Into Sycamore Trees. The most serious disease of sycamore trees is anthracnose. Methods for Killing Sycamore Trees. Tree anthracnose is caused by a fungal infection fueled by optimal weather conditions. Apiognomonia Veneta – Attacks london planes and sycamores. Each species of tree is infected by a different species of fungus, thus the fungus does not spread from oak to maple or maple to ash or ash to sycamore. caused by the fungus Apiognomonia veneta. A close look at the fallen leaves will reveal brown areas that typically follow along the veins of the leaves. If left untreated, the tree may die from repeated defoliation. can you cut down a sycamore tree? Also Know, is my sycamore tree dying? Infected leaves develop tan to reddish brown lesions that extend along the veins of the leaf. Although the disease is rarely fatal and trees will grow a second set of leaves, repeat infections will result in abnormal branching and will leave a tree stressed and more susceptible to other diseases and pests. But: March-April the leaves are paltry and sad. Picking up and disposing of all diseased plant parts, including twigs and leaves, from the ground or from around the plant is important. Seed pods in the form of fuzzy ball-like clusters hang from the branches in winter. Sycamore Tree Fungus Leads to Diseases Anthracnose. Anthracnose control begins with practicing good sanitation. Trees can be pollarded to develop a lower canopy. Sycamore anthracnose, however, is caused by Apiognomonia veneta, a completely different fungal genus. Oriental plane tree (zones 7-9) and London plane tree cultivars, Bloodgood, Columbia and Liberty are less susceptible to the disease than the American sycamore. They won’t kill anthracnose but will help to keep it under control by not allowing its spores to germinate. Brown areas eventually enlarge to include the whole leaf. It's a huge (60') and potentially lovely tree that dominates my backyard. Twigs can develop cankers, which are sunken areas of dead tissue (fig 4). Like anthracnose diseases of other shade trees, sycamore anthracnose is a very common occurrence in the landscape (Figure 1). These areas of browning are often V-shaped. 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