Both adults and nymphs feed on the undersides of leaves. 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. The disease first affects older leaves on a branch, before moving to newer leaves and eventually killing the entire branch. Pruning infected branches can slow its spread. Clemson University Cooperative Extension Service offers its programs to people of all ages, regardless of race, color, gender, religion, national origin, disability, political beliefs, sexual orientation, gender identity, marital or family status and is an equal opportunity employer. It has a pyramidal form in youth but develops a spreading, rounded and irregular crown with age. Unless infected by disease, sycamores are usually long-lived trees. 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. Older leaves turn brown, and dead areas occur along the leaf veins. This disease can kill twig tips, expanding to buds, new shoots, and leaves. Bacterial Leaf Scorch: Bacterial leaf scorch (BLS) is a problem on several species of shade trees, including American sycamore and London planetree, oaks, maples, sweetgum, dogwood and American elm. Sycamore anthracnose is a common tree disease that results in extensive defoliation, shoot dieback, and twig death of your sycamore trees. Spores (reproductive structures) from the fungus are spread by rain and wind to healthy leaves, buds and twigs. If insecticide application becomes necessary and is feasible, acephate (sprays) and imidacloprid (soil drench) are recommended for homeowner use. Read and follow all directions on the label. The symptom you see most frequently is crinkling and browning of the leaves. In the warmer parts of the year, you’ll need to water your sycamore at least twice a week. Sign up for our newsletter. This tree disease will occur on well-established plantings and those already under stress. The spores can spread by the wind and rain. These yellow flecks are visible from the leaf’s upper surface. Prevention & Treatment: The sycamore lace bug has several natural enemies, including assassin bugs, minute pirate bugs, lacewings, spiders and predaceous mites. When spraying is feasible and necessary, several fungicides (myclobutanil*, thiophanate methyl*, propiconazole, chlorothalonil, sulfur, copper fungicides, and horticultural oil) are available. It is caused by Xylella fastidiosa, a bacterial pathogen (disease-causing organism) with … The insects feed on the undersides of the sycamore’s leaves. Identifying the Disease. Another common disease of sycamore trees is powdery mildew fungus. Prevention & Treatment: There is no way to prevent BLS, but if affected limbs are pruned out early in the infection and well below the scorched leaves, a cure may be possible. It is caused by the fungus Apiognomonia venata (asexual stage – Discula platani). Let’s take a look at some of the most common problems these sturdy shade trees face. Providing irrigation, mulch and fertilizer to an infected tree can extend the life of the tree. They have piercing/sucking mouthparts that they use to remove sap from the leaves. A single attack seldom causes harm but if the tree is infected several years in succession it will weaken a tree, making it susceptible to borer attack and winter injury. It is often impractical to spray large trees. A fungal disease, sycamore anthracnose typically affects the young shoots and leaves of a tree. This tree is especially tough and very suitable for a shade tree or screen. The most dangerous of the diseases of sycamore trees is anthracnose, also called leaf and twig blight. The sycamore tree is prone to sooty bark (cryptostroma corticale). Sycamore Fungus. Prevent Sycamore Tree Diseases & Pests. Bacterial Leaf Scorch: Bacterial leaf scorch (BLS) is a problem on several species of shade trees, including American sycamore and London planetree, oaks, maples, sweetgum, dogwood and American elm. This tree was also once called Buttonwood, because of the round seeds, which look like big buttons. The white bark peels off in patches and is the most ornamental trait. All recommendations for pesticide use are for South Carolina only and were legal at the time of publication, but the status of registration and use patterns are subject to change by action of state and federal regulatory agencies. The recurrence of this problem has led some companies to curtail or halt commercial plantations. This bacterium lives in the host plant’s xylem (water-carrying tubes). The domina… Trees that don’t get enough water also become susceptible to pest infestations and diseases. As always, the first line of defense against pest problems is to follow recommended cultural practices in order to maintain healthy plants. Rhytisma acerinum is the teleomorph of tar spot. Gnomonia platani), an introduced fungus found naturally on the Oriental plane P. orientalis, … 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. When a small twig or branch is affected, cankers may girdle and eventually kill the branch. Its most recognizable feature is its bark that peels away as the trunk expands, revealing the white, tan, and green inner bark. New growth is often stunted. Sign up to get all the latest gardening tips! In late summer, small, pinhead-sized black structures may develop on the whitish gray patches. Often confused with frost damage, signs of … Promote plant vigor by protecting the tree from stresses. This disease can kill twig tips, expanding to buds, new shoots, and leaves. There are several damaging diseases and pests that affect sycamore trees. Symptoms tend to begin with older leaves on a branch and then develop in younger leaves. It is caused by Xylella fastidiosa, a bacterial pathogen that kills off entire branches of the tree. The disease stunts new growth as well. Sycamore leaves showing the scorched appearance and upward curling characteristic of BLS.Edward L. Barnard, Florida Department of Agriculture and Consumer Services. Insecticides and Fungicides for Sycamore Insect Pest and Disease Control. These patches may coalesce (grow together) to form a thin powdery layer on the plant surface. Canker stain: London plane and sycamore trees have sparse foliage, small leaves, and elongated sunken cankers on the trunk and larger branches. Bacterial leaf scorch can also be a problem. COVID-19 Extension Updates and Resources ... 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