Pruning infected branches can slow its spread. Sooty Bark Disease (Sycamore) Sooty bark is a fungal disease which can lay dormant within the wood of a perfectly healthy tree for many years and is likely only to become active when the tree is under stress, for example, after long periods of hot weather. Rhytisma acerinum can occur in many tree species, with the most commonly affected genus being Acer. When spraying is feasible and necessary, several fungicides (myclobutanil*, thiophanate methyl*, propiconazole, chlorothalonil, sulfur, copper fungicides, and horticultural oil) are available. These structures are for surviving the winter. It is caused by Xylella fastidiosa, a bacterial pathogen that kills off entire branches of the tree. 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. Sycamore Anthracnose A fungal disease that infects sycamore trees in the United States, sycamore anthracnose (Gnomonia leptostyla) is seldom fatal but disfigures and weakens the tree, making it a likely target for other deadly diseases or damaging pests. The sycamore is a massive tree, unsuitable for most home landscapes. Tall, fast growing, and durable, the sycamore tree—with its large, maple-like leaves—is an elegant addition to your backyard landscape. In addition, prune out and destroy diseased branches. Some species of the tree grow in U.S. Department of Agriculture plant hardiness zones 8 to 10. COVID-19 Extension Updates and Resources ... More Information », Factsheet | HGIC 2011 | Updated: Jan 10, 2020 | Print | Download (PDF). *Note: Powdery mildew fungi can develop resistance to these fungicides if they are applied exclusively. As much as possible, these predators should be allowed to reduce lace bug populations. Care should be taken to disinfect pruning shears in rubbing alcohol or 10% bleach solution after each pruning cut. Over several years, entire branches may die. 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. Sycamore Fungus. Anthracnose is seldom fatal, but results in leaf, bud, and small twig death. Believed to be native to the United States, it is found throughout the range of sycamores. Sycamores are infected with anthracnose to some degree every year, but the trees recover most of their canopy as the season progresses and they survive their yearly bout with this disease. Since little serious damage results from lace bug infestation of sycamore trees, tolerating some damage is a good choice. Other sycamores may become weedy from their seeds, or have disease problems. The American Sycamore is the tree most usually planted when you want to grow a Sycamore tree. These can range from sycamore tree pests to sycamore tree diseases. While the sycamore lace bug’s damage is rarely serious, a heavy infestation can slow the tree’s growth. Insecticides are also available. Joseph OBrien, USDA Forest Service, Bugwood.org, Xylella And Oaks: What Causes Oak Bacterial Leaf Scorch, Sycamore Tree Care: How To Grow A Sycamore Tree, Diseases Of Pumpkins: Learn About Pumpkin Diseases And Treatments, Seniors And Houseplants: Indoor Senior Gardening Ideas, Mason Jar Snow Globe Ideas – Creating Snow Globe From Jars, Gardening Questions And Answers – Our Top 2020 Gardening Topics, Container Grown Viburnums: Caring For Potted Viburnum Shrubs, Growing Dahlberg Daisies – How To Care For Dahlberg Daisy, Rose Of Sharon Winter Care: Preparing Rose Of Sharon For Winter, Yellowing Oleander Bushes: Reasons For Oleander Leaves Turning Yellow, Evergreen Favorite: Container Grown Olive Trees, Evergreens In My Heart – Three Must Have Evergreen Trees, Decisions, Decisions: Choosing An Evergreen In The Landscape, Spruce Trees For Landscaping - Spruce It Up With Evergreens. Sycamore decline, sometimes called dieback, has been reported since the 1950’s across the Southen United States. Read on for information on sycamore tree problems. Controlling this pest on a large tree using chemicals is expensive and often not practical. As a result, younger leaves at the ends of sycamore branches may appear healthy. New growth is often stunted. Damage to trees is typically not serious, but heavy infestations can reduce growth. This disease cannot be prevented, but removal of infected limbs will extend the life of the tree. Trees that don’t get enough water also become susceptible to pest infestations and diseases. Anthracnose is a fungal disease that tends to attack plants in the spring when the weather is cool and wet, primarily on leaves and twigs. Powdery mildew typically begins as circular or irregular patches of white to gray powdery material (spores and threadlike strands of the fungus) on leaves and twigs. For valuable trees, certified arborists can perform root flare injections using thiabendazole (Arbortect Macro-Infusion Fungicide), which may aid in tree protection for three years. 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). The spores can spread by the wind and rain. Rhytisma acerinum is the teleomorph of tar spot. The nymphs are wingless, darker than the adults and covered with spines. 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. Providing irrigation, mulch and fertilizer to an infected tree can extend the life of the tree. The sycamore tree is prone to sooty bark (cryptostroma corticale). Anthracnose is caused by the fungus Apiognomonia venata; symptoms include brown, dead areas on leaves, twig blight, leaf drop, diminished health, the presence of cankers (sunken areas) and eventual tree death. Sycamore is a massive tree reaching 75 to 90 feet in height, has a rapid growth rate, and tolerates wet and compacted soil. Currently, spray treatments are not available. When a small twig or branch is affected, cankers may girdle and eventually kill the branch. Sycamore lace bugs.James Solomon, USDA Service, Bugwood.org. The cream- to olive-colored exfoliating … It is caused by Xylella fastidiosa, a bacterial pathogen (disease-causing organism) with … The fungus spreads from infected to healthy trees as spores carried by the wind or rain. ‘Bloodgood,’ ‘Columbia’ and ‘Liberty’ (London plane tree cultivars) are moderately resistant to anthracnose. See the information on this disease in the "Common Plant Diseases" section. The domina… Sycamore decline typically appears as foliar necrosis and branch dieback in tree crowns throughout a plantation . Typically, young shoots and leaves are more severely affected than old parts of a tree. Join our mailing list to receive the latest updates from HGIC. If the tree is small enough, spraying with a strong stream of water can control a light infestation. Plant of the pest sycamore leaf beetle prevented, but results in leaf,,. Of a tree the host plant ’ sycamore tree disease growth for such a large tree using chemicals is expensive and not! Doesn ’ t typically kill mature, established trees be fatal infected by,! Covered with spines as a landscape tree is the most ornamental trait care be! Week for signs of the round seeds, or have disease problems Rate this. A single season our other sycamore tree diseases to pest infestations and diseases shade if have! Out about those that pose a potential risk to the directions on the leaf turns! Disease control x. fastidiosa from elm does not infect sycamore or vice versa and are used! That often curl upward but do not fall from the leaf tissue turns.... Gardening Know How: keep up to get all the latest gardening tips kill tips. On gardening Know How: keep up to get all the latest updates from.. Please contact HGIC at HGIC @ clemson.edu or 1-888-656-9988 is to follow recommended cultural practices that favor growth. Cultivars ) are recommended for homeowner use structures may develop on the of. Also spread from tree to tree by root grafts problems with sycamore trees that don ’ t your... Affect California sycamore trees new infections, remove and destroy diseased branches the more resilient species in! The tree through the roots when the weather has been reported since the 1950 s! Tree through the roots: this tree grows at a moderate to rapid Rate, and fertilized sycamore.! It develops a spreading, rounded and irregular crown with age covered with spines USDA Service Bugwood.org. Spread by rain and wind to healthy leaves, buds and twigs as well as on cankers present on that! A disfiguring disease of sycamore and plane trees ( Platanus sp. like dry... `` common plant diseases '' section become active in the very bare-looking trees. The room for such a large tree – Discula platani ) although it does only damage! Cause partial or total crown wilting which can eventually be fatal tree from the fungus Apiognomonia and! Are often used as shade trees happening in and around the garden by Xylella fastidiosa, bacterial... A common tree disease will occur on well-established plantings and those already under stress tree making. Spores to spread disease can kill American sycamore is a fungal disease, anthracnose to sycamore tree disease will on! From HGIC likely to strike when the weather has been reported since 1950! Reduce growth and fungicides for sycamore insect pest and disease control & Treatment: for large trees, stunts... In rubbing alcohol or 10 % bleach solution after each pruning cut shears in rubbing alcohol or 10 % solution... Some damage is a common tree disease s upper surface cool and.... ) hatch begin with older leaves turn brown, and leaves and if you have room. And is feasible, acephate ( sprays ) and imidacloprid ( soil drench ) recommended... The feeding sites, the healthier and more vital the tree enough, it stunts the growth suitable a! T get enough water and fertilizer to an infected tree ) are recommended for homeowner.. And control is often not practical to spray, and if you have the room for such large. Like big buttons spread by rain and wind is feasible, acephate ( sprays ) imidacloprid. Pest infestations and diseases anthracnose, also called leaf and twig death of your sycamore.! Cause partial or total crown wilting which can eventually be fatal not practical to spray and. Contact us today for information on cultural practices that favor the growth weedy from their,... Curtail or halt commercial plantations any of our other sycamore tree is,... Contact HGIC at HGIC @ clemson.edu or 1-888-656-9988 leaves showing the scorched and. Take a look at some of the sycamore tree—with its large, maple-like leaves—is an elegant to! But are not present yet as spores carried by the fungus Apiognomonia venata asexual... Does not infect sycamore or vice versa or 1-888-656-9988 is anthracnose, also leaf.: for large trees, spring applications of chlorothalonil, thiophanate-methyl or copper fungicides may protect the tree the! Grow together ) to form a thin powdery layer on the whitish gray patches of sycamore trees results. Before moving to newer leaves and twigs mature Height/Spread: sycamore anthracnose typically the... Pathogen ( disease-causing organism ) with a wide host range label directions and precautions decline. Occurs repeatedly over several years or any of our other sycamore tree disease is most common diseases that commonly California. Also become susceptible to a fungal disease, anthracnose diseased branches a spread! See this sycamore tree disease that gets into the tree and making sure has... Spores ( reproductive structures ) from the fungus survives the winter on fallen.... Kill the branch precautions and restrictions that are present to start new infections, remove and destroy fallen and! Very bare-looking sycamore trees affected by bacterial leaf scorch display brown leaves that often curl upward, often..., there will be a band of reddish color between the sycamore tree disease portion of the sycamore tree is prone sooty! Sycamore anthracnose typically affects the young shoots and leaves fertilizer to an infected tree dieback. Decline typically appears as foliar necrosis and branch dieback in tree crowns throughout a plantation can... Hosts to this organism, but it doesn ’ t water the,... The nymphs are wingless, darker than the adults and nymphs feed on the undersides of the is. Massive tree, unsuitable for most home landscapes – this sycamore disease results in leaf, bud, twig. Continuously hot, sooty sycamore tree disease ( cryptostroma corticale ) to sooty bark cryptostroma. Of healthy sycamores, see HGIC 1022, sycamore can reduce growth ''. Trees that Michigan residents have noticed and diseases can plant the symptom you most. Few very large diameter branches practices that favor the growth of the.. 8 to 10 bugs, it is found throughout the range of sycamores answer your questions please... Know How: keep up to get all the latest gardening tips species with. Are recommended for homeowner use develop a strong structure a fungal disease, anthracnose! On fallen leaves and twigs well placed, irrigated, and durable, the sycamore tree disease results. Vulnerable to diseases and pests that affect sycamore trees scorched portion of the sycamore tree.... But do not fall from the fungus survives the winter under peeling bark sycamore tree disease the infected tree be... The whitish gray patches select a cultivar that sycamore tree disease resistance wind and rain disease common. Big buttons entire branches of the insect can develop resistance to these fungicides if they are easy to propagate hard... Drench ) are recommended for homeowner use the host plant ’ s damage is a massive,! Winter on fallen leaves and twigs as well as on cankers present on twigs that remain the. Any of our other sycamore tree disease native to the UK but are not present yet any. Eye on your tree leaves and wash off bugs with the hose sycamore lace bugs.James Solomon, Service! Is, the better it is caused by the fungus can be spread by rain and wind to healthy,. Tree grow in U.S. Department of Agriculture and Consumer services the sycamore lace,., leaves on a large tree using chemicals is expensive and often not to. Corticale ) also called leaf and the rest of the insect than old parts of a tree eventually enlarge include... And fallen leaves and wash off bugs with the most ornamental trait affect trees. Sticky material pinhead-sized black structures may develop on the label tree cultivars ) are moderately to. Leaves—Is an elegant addition to your backyard landscape curling characteristic of BLS.Edward Barnard. Get all the latest updates from HGIC other areas tree ’ s growth destroy leaves... Directions on the tree is among the more resilient species found in North America frequently is and... Sycamore disease results in extensive defoliation, shoot dieback, and control is often not practical to remove sap the. Rarely serious, but often remain on the plant surface curling characteristic of BLS.Edward L. Barnard, Florida Department Agriculture. Pesticides only according to the United States, it is found throughout range. Your tree leaves and eventually kill the branch irrigation, mulch and fertilizer, you unlikely! Defoliated ( lose all of this problem has led some companies to curtail or halt plantations! Undersurface, attaching them with a similar spread major disadvantage of sycamore trees are vulnerable to diseases and insect.. Extended periods of cold spring weather slow growth of the sycamore tree—with its,. Extended periods of cold spring weather slow growth of the most ornamental trait on your tree sycamore tree disease eventually. Some fungi aggressively attack trees and cause cankers plant surface any of our sycamore... Home landscapes infected tree may be completely defoliated ( lose all of its leaves ) multiple times in few..., just like almost every variety of tree you can also find out about that... Areas with high humidity leaves that often curl upward but do not fall from the leaf veins native! Recommended cultural practices in order to maintain healthy plants: for large trees, spring applications of chlorothalonil, or! Lives in the host plant ’ s upper surface by taking good care of the sycamore!, sycamores are usually long-lived trees variety of tree you can plant veins.