Anthracnose is caused by the Sycamore tree fungus Apiognomonia veneta and is often mistaken for frost damage. Sycamore. How to Inject Fungicide Into Sycamore Trees. Photo: William Jacobi, Colorado State University, Bugwood.org . The first symptoms appear on young leaves as they unfold. Our experience provides multiple options for treatment that are not available elsewhere. Sycamores (Platanus sp.) History of Sycamore Anthracnose Treatment In the past, the only real option open to arborists for the treatment of Sycamore Anthracnose was to spray various fungicides on the leaves and twigs to try and control the disease. in anthracnose management today. Sycamore’s can be harder hit with anthracnose, and if it is a really bad infection, you can have enough damaged leaves to significantly harm your trees, but rarely does anthracnose kill a tree. Anthracnose is not a significant threat to the health of the tree and doesn’t require treatment in most cases. One thing to note, however, is that while anthracnose isn’t often deadly for your tree, it can and likely will cause some aesthetic damage. We have had many reports in the past of American sycamores (Platanus occidentalis) and London plane trees (a cross between American sycamore and Oriental plane tree with the scientific name Platanus x acerifolia) … In cases of frost damage, however, there will be no signs of canker on the twigs, or staining of the wood below damaged buds. In addition, injections of fungicides into the tree have given erratic and unsatisfactory control of the disease. A close look at the fallen leaves will reveal brown areas that typically follow along the veins of the leaves. They hatch as the buds swell in spring. It usually takes two growing seasons to actually see a healthier sycamore. We can also treat trees with an injectable fungicide which offers three years of protection from sycamore anthracnose. Back to shade tree anthracnose. Sycamore trees are highly susceptible to a fungal disease called anthracnose. Sycamore anthracnose is a destructive fungus disease that occurs almost every year wherever the American sycamore (Platanus occldentalis) grows in the United States. There is no need for excessive concern or treatment as the affected trees will most likely re-grow their leaves. Treatment. In some years the disease symptoms are inconspicuous and little in-jury occurs. Select Page. Tan to brown irregular shaped spots or blotches on young leaves. California sycamore (Platanus racemosa) is very susceptible to anthracnose which disfigures the tree, giving it a twisted appearance. To inject a tree, we excavate the root flares, drill small holes, and insert tubes, which provide the fungicide (fig 6). Anthracnose damage can be confused with frost damage. of sycamore trees is anthracnose. Brown areas eventually enlarge to include the whole leaf. During cold, wet springs, microscopic spores are produced and spread by splashing rain water or wind. In general, anthracnose will not kill a tree. During rainy springs additional applications are needed at 7 to 14 day intervals until conditions for this disease are no long favorable (see . It can kill American sycamore, although it does only minor damage to other varieties. Sycamore anthracnose is favored by cool, wet weather (temperatures under 60 F) during budbreak and the few weeks of growth that follow. This disease can kill twig tips, expanding to buds, new shoots, and leaves. A sycamore leaf infected with anthracnose. Management & Treatment Options Management for anthracnose is all about following proper tree care procedure. What is Sycamore Anthracnose and how do you treat? Apply sprays as buds begin to swell. Research and experience show that fungicide control of anthracnose is rarely warranted because anthracnose usually does not seriously damage tree health. By: Teo Spengler Printer Friendly Version. While damages resulting from anthracnose infections are generally inconsequential to the overall health of a tree, repeated attacks from the disease year after year can weaken a tree’s defenses enough to leave it susceptible to other diseases and insect infestations. In order to really get a handle on this disease to make sure it does not spread to a healthy tree. Anthracnose – Description & Treatment. Plane Tree Anthracnose is becoming commonplace. <0.3″) can be enough to promote disease development. Quick treatment can often be all that is required to save your tree from devastation and disfigurement. Dogwood, birch, elm, walnut, butternut, hickory, and other trees may also be damaged. Infection from sycamore anthracnose. At Hendricksen Tree Care, our arborists can diagnose and effectively treat trees affected by anthracnose with our tree care and maintenance services. The most dangerous of the diseases of sycamore trees is anthracnose, also called leaf and twig blight. Sycamore Anthracnose Treatment. Infected leaves are often distorted, cupped or curled. Preventative applications of ArborSystems Shepherd Fungicide are most effective when applied in the late summer, around one month prior to the typical first frost. Conditions were perfect in spring 2013 for a severe outbreak of sycamore anthracnose, caused by the fungus Apiognomonia veneta (say that three times!). Oriental plane trees (P. orientalis) are also reported to be less susceptible to sycamore anthracnose, according to a Missouri Botanical Garden article, but would not be recommended for planting in Michigan since they are only hardy up to a United States Department of Agriculture (USDA) plant hardiness zone of 7, which is warmer overall temperatures than we experience here in Michigan. Anthracnose tends to be most severe when extended cool and wet weather occurs in the spring. 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