The resulting tree decline may require removal of the infected tree. They are easy to propagate from hard wood cuttings and provide ample shade if you have the room for such a large tree. This sycamore tree disease is most likely to strike when the weather is cool and wet. Other sycamores may become weedy from their seeds, or have disease problems. Pruning infected branches can slow its spread. The insects feed on the undersides of the sycamore’s leaves. The following spring, they produce a second kind of spore that causes more infection. It has a pyramidal form in youth but develops a spreading, rounded and irregular crown with age. Sycamore Lace Bug: Sycamore lace bug (Corythucha ciliata) gets its name from the lacy pattern seen on the adult’s wings, head, and thorax (chest region). Bacterial leaf scorch can also be a problem. COVID-19 Extension Updates and Resources ... More Information », Factsheet | HGIC 2011 | Updated: Jan 10, 2020 | Print | Download (PDF). When a small twig or branch is affected, cankers may girdle and eventually kill the branch. This tree is especially tough and very suitable for a shade tree or screen. Signs and Symptoms of Sycamore Anthracnose Currently, spray treatments are not available. Spores (reproductive structures) from the fungus are spread by rain and wind to healthy leaves, buds and twigs. Anthracnose Growth Rate: This tree grows at a moderate to rapid rate, and has a moderate to long life span. Some species of the tree grow in U.S. Department of Agriculture plant hardiness zones 8 to 10. The white bark peels off in patches and is the most ornamental trait. Rhytisma acerinum is the teleomorph of tar spot. Prevent Sycamore Tree Diseases & Pests. However, it is not impervious to disease. You can also find out about those that pose a potential risk to the UK but are not present yet. Look for patches of powdery white matter on sycamore leaves or branches, an indication that your sycamore has powdery mildew disease. However, it is possible that you experience problems with sycamore trees. The extent and severity of the disease varies with the spring weather; the cooler and wetter springs usually are associated with greater problems with anthracnose. Another common disease of sycamore trees is powdery mildew fungus. Use pesticides only according to the directions on the label. Over several years, entire branches may die. Of the 10 species of sycamore (Platanus species), one species, American sycamore (Platanus occidentalis) and one hybrid, London plane tree (Platanus x acerifolia) are common in South Carolina. If you know the name of the tree pest or disease affecting your trees, see the Forestry Commission guidance giving detailed information on specific tree pests or diseasesknown to be present in the UK. To enter a new plant, the bacteria are generally carried by insects such as leafhoppers, sharpshooters and spittlebugs that have fed on xylem fluid from an infected plant. Around the feeding sites, the leaf tissue turns yellow. Marjan Kluepfel, Former HGIC Horticulture Information Specialist, Clemson UniversityJanet McLeod Scott, Former Horticulture Information Specialist, Clemson UniversityJames H. Blake, EdD, Extension Associate/Adjunct Professor, Dept. If insecticide application becomes necessary and is feasible, acephate (sprays) and imidacloprid (soil drench) are recommended for homeowner use. Powdery Mildew: Microsphaera species cause powdery mildew disease on sycamores. Sycamore anthracnose symptoms can be severe when we have cool, moist spring weather at the time of bud-break and leaf emergence, but healthy trees generally recover and put on new leaf area once the environmental conditions that favor the disease change to the warmer, drier conditions of late spring and summer. Read and follow all directions on the label. Identifying the Disease. It can be treated with fungicides. Pyramidal in youth, it develops a spreading rounded or irregular crown with age, supported by a few very large diameter branches. In the warmer parts of the year, you’ll need to water your sycamore at least twice a week. Many fungi that cause cankers normally inhabit the surface of the tree, gain entrance through natural or man-made wounds, and only cause disease when the tree is under stress. Insecticides are also available. This defoliation will not kill an otherwise healthy tree unless it occurs repeatedly over several years. Both adults and nymphs feed on the undersides of leaves. Controlling this pest on a large tree using chemicals is expensive and often not practical. Prevention & Treatment: Apply adequate fertilizer and water to maintain the vigor of the tree(s) as per recommendations in HGIC 1000, Fertilizing Trees & Shrubs. This disease cannot be prevented, but removal of infected limbs will extend the life of the tree. Sphaeropsis tip blight, formerly known as Diplodia, is a fungal tree disease most commonly affecting Austrian pines (Pinus nigra), Scotch pine (P. sylvestris), ponderosa pine (P. ponderosa) and mugo pine (P. mugo). This information is supplied with the understanding that no discrimination is intended and no endorsement of brand names or registered trademarks by the Clemson University Cooperative Extension Service is implied, nor is any discrimination intended by the exclusion of products or manufacturers not named. The sycamore is a massive tree, unsuitable for most home landscapes. Sycamore trees are vulnerable to diseases and insect pests, just like almost every variety of tree you can plant. This disease can kill twig tips, expanding to buds, new shoots, and leaves. The disease stunts new growth as well. Follow all directions, precautions and restrictions that are listed. The recurrence of this problem has led some companies to curtail or halt commercial plantations. The majestic sycamore tree provides great shade for lawns. Gnomonia platani), an introduced fungus found naturally on the Oriental plane P. orientalis, … Sign up for our newsletter. This tree disease will occur on well-established plantings and those already under stress. This disease may appear as four distinct phases: Sycamore anthracnose symptoms on leaves and twigs.Robert L. Anderson, USDA Forest Service, Bugwood.org, Sycamore anthracnose symptoms on leaf.Clemson University – USDA Cooperative Extension Slide Series, Bugwood.org. The fungi overwinter in dead twigs and fallen leaves. Verticillium wilt is a fungal disease that gets into the tree through the roots. Anthracnose is caused by the Sycamore tree fungus Apiognomonia veneta and is often mistaken for frost damage. Anthracnose can usually be prevented by taking good care of the tree and making sure it has enough water and fertilizer. Extended periods of cold spring weather slow growth of the sycamore tree. Join our mailing list to receive the latest updates from HGIC. Sycamore is susceptible to sooty bark, which can lead to wilting of the crown and death of the tree, as well as a variety of other fungal diseases. While the sycamore lace bug’s damage is rarely serious, a heavy infestation can slow the tree’s growth. Sycamore decline, sometimes called dieback, has been reported since the 1950’s across the Southen United States. Powdery mildew disease will not kill your tree. In a few days, the nymphs (immature stage) hatch. Care should be taken to disinfect pruning shears in rubbing alcohol or 10% bleach solution after each pruning cut. Older leaves turn brown, and dead areas occur along the leaf veins. 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