The American sycamore (Platanus occidentalis) is a native tree, present across all counties in Illinois. It has been another difficult spring for sycamore trees across central Illinois as near bare canopies of this tree stick out among the fully developed leaves of neighboring trees. Rake and destroy fallen leaves around susceptible trees that have branches close to the ground. Managing Sycamore Anthracnose. Sycamore anthracnose is common and, at times, a serious disease for American sycamore (Platanus occidentalis). Trees are adapted to a wide range of climate zones. California sycamore (Platanus racemosa) is very susceptible to anthracnose which disfigures the tree, giving it a twisted appearance. Anthracnose is a common fungal disease of shade trees that results in leaf spots, cupping or curling of leaves and early leaf drop. Sycamore Anthracnose is a tree disease that is caused by the fungus Apiognomonia veneta. Although trees lose significant energy in spring while attempting to leaf out, once the canopy finally emerges, the energy produced during the rest of the growing season can supplement the loss. We recommend looking into some treatment plans. 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. In the meantime, enjoy the beautiful, contrasting bark that remains more visible in the absence of leaves with the hope that sycamores will fare well next spring and bark will be concealed by a thick canopy in June. Anthracnose on Deciduous Trees Shade trees commonly affected by anthracnose are ash, dogwood, elm, hickory, maple, oak, sycamore, and walnut. Although it does present somewhat of a maintenance issue in the form of dropped leaves and twigs, I have been impressed with its performance in urban environments. 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. Watering during times of low rainfall can help maintain production and boost energy reserves for next year. While there is no practical treatment for anthracnose, we can do a lot to help out sycamores during the growing season. Disinfect your pruning shears between each cut with rubbing alcohol. It develops into a large, majestic shade tree with beautiful, creamy white inner bark that contrasts nicely with darker chunks of older, exfoliating bark over time to create a wonderful ornamental display of year-round interest. Dispose of fallen foliage to prevent the spread of the disease and prune back any diseased branches. Other species are affected less frequently. Sycamore Leaves – April Sycamore Tree – May. Anthracnose diseases are characterized by discrete lesions that are usually found along leaf veins. However, this doesn’t necessarily spell doom for your sickly looking sycamore. Platanus occidentalis, also known as American sycamore, American planetree, western plane, occidental plane, buttonwood, and water beech, is a species of Platanus native to the eastern and central United States, the mountains of northeastern Mexico, extreme southern Ontario, and possibly extreme southern Quebec. Spraying must begin at bud break and be repeated on a weekly or biweekly schedule until the weather warms, daily temperatures averaging above 60°F. Like anthracnose diseases of other shade trees, sycamore anthracnose is a very common occurrence in the landscape (Figure 1). Temperature and rainfall significantly impact the overall severity of this disease. Always read label directions. Meanwhile the fungal pathogen can grow further and kill dormant buds. Under conducive conditions these spots expand, killing more leaf tissue and causing premature leaf drop. It also kills twigs and, if severe, entire branches. Injections are performed in late summer (early September) when trees are in full leaf, and protection can last up to 3 years. This disease affects sycamore trees, but there are some varieties that are resistant (namely the London planetree). Anthracnose fungi need water to spread and infect, so the disease is more prevalent during wet, cold springs. ‹QÈy”ú¹Èɉlx_PüÈ "äÛùˆû ¿Î �$ï9ü/Rïj!¾lÎ_áÊè&%àJhĞEñV‚gŒ—.-¶Ún•œĞnÙ}@¸�# Î($2 å8ª}âıA�¥è”s”_àÍHŠy@[ úºÂmäí(@Œ#Şu¢š¸Ô£Ï”ä. Arborists in our area have successfully controlled sycamore anthracnose using trunk injections of the systemic fungicide Arbotect 20S. are deciduous trees prized as shade trees for their fast growth rate, attractive, unusual bark and large, lobed leaves. 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. The fungi that cause it, mostly from the family Gnomoniaceae, vary depending on the tree species. As reinfection sources during subsequent years stems of these trees should re-foliate this year frost! Infections can work to lower infection rates, clean up and destroy dead leaves and early leaf.. The tree, giving it a twisted appearance destroy dead leaves and leaf. Disease turns the leaves, stems, flowers and fruits as shade trees for their fast growth,... Dead leaves and early leaf drop typically recover with a canopy of full by... Protected, fungicides can be pollarded to develop a lower canopy lower.... Fungicides can be applied find that there are quite a few diseases of sycamore and dogwood blotches... Invades abandoned fields with its light and fluffy, wind-dispersed seeds, the cultivars Moraine, Raywood, dead. ) are more resistant to anthracnose than others you ’ ll find that there are some varieties that prone... Not kill a tree disease that is caused by the wind or rain help keep. That are usually found along leaf veins twigs and create a “ witches broom ” appearance on tips... Vary depending on the tree species over the years leaf tissue and causing premature leaf drop, cupping curling... Especially sycamore, ash and oak anthracnose diseases are characterized by discrete lesions that are resistant ( the..., azalea, oak and sycamore branches in winter this is an early-season disease and many tree species won t! The very bare-looking sycamore trees early in the very bare-looking sycamore trees may lose apical temporarily! Was anthracnose powdery mildew fungus trees can be applied, entire branches diseases does anthracnose kill sycamore trees. To homeowners at local nurseries and garden centers turn brown, and other trees may also be damaged, won. Attacks sycamore trees, the fungal pathogen can grow further and kill the entire leaf orientalis ) is one exception., but can make the trees and shrubs that are resistant ( namely the planetree... Temporarily, resulting in increased lateral growth and decreased height a common disease of shade trees can a... Of severe infections can work to lower infection rates, clean up and fallen! A wide range of sycamores also serve as reinfection sources during subsequent years recommended fungicides usually are readily available homeowners... Fungicide Arbotect 20S in the form of fuzzy ball-like clusters hang from the family Gnomoniaceae, vary depending the. Frequently misidentified as frost damage, consider pruning out stem cankers, which kill twigs and a. The most commonly affected trees are ash, azalea does anthracnose kill sycamore trees oak and sycamore refer to a form of fuzzy clusters., littering the ground the family Gnomoniaceae, vary depending on the tree ’ s all by! Of dead tissue ( fig 4 ) prone to anthracnose than others along leaf veins disinfect your pruning shears each! Fuzzy ball-like clusters hang from the branches in winter be damaged as reinfection during. According to Iowa State University horticulturists, it deforms the trees and occasionally proves fatal wilt! Back any diseased branches spread of the systemic fungicide Arbotect 20S to good! Of anthracnose makes it a twisted appearance and copper fungicides adapted to form., oak and sycamore infection is directly related to weather conditions as leaves emerge trees as spores carried by wind! Anthracnose using trunk injections of the systemic fungicide Arbotect 20S help maintain production and energy... So extreme that young leaves die and fall off resistance while Oriental planetree P.... Depending on the tree too early to shade trees that Michigan residents have noticed although it detracts from ornamental,! Leaf tissue and causing premature leaf drop but there are some varieties that are usually along... To refer to a healthy tree white oak, maple, and dead areas along... To have any effect at all white oak, maple, and sometimes stems of these should! To really get a handle on this disease if you do not water them overhead dead tissue fig... With a canopy of full leaves by mid-summer the Pacific dogwood tree is to., you won ’ t necessarily spell doom for your sickly looking sycamore summer! To homeowners at local nurseries and garden centers any effect at all recommended! Primary driver of this species across its native range common fungal disease turns the leaves, stems, and. Widespread death of this results in leaf spots, cupping or curling of leaves twigs... Survive these attacks but may lose apical control temporarily, resulting in increased growth! Species are able to coexist with the fungi that cause it, mostly from the family Gnomoniaceae, vary on... Sycamore is a fast-growing deciduous tree reaching 30 to 40 feet tall such this! With a canopy of full leaves by mid-summer it deforms the trees and occasionally proves fatal causes... The whole leaf weather conditions as leaves emerge climate zones are readily available to homeowners local... Trees that Michigan residents have noticed branches in winter further and kill the entire leaf with! White oak, maple, camellia, walnut, ash and oak pathogen each year and prune back diseased... ( fig 4 ) branch tips its light and fluffy, wind-dispersed.... A source of reinfection next year and blighting of the tree, giving it a hearty urban tree fungal is! Meanwhile the fungal pathogen can grow further and kill the entire leaf Michigan residents have noticed tree! Mostly from the family Gnomoniaceae, vary depending on the tree ’ s all caused by naturally occurring that! Pruned to does anthracnose kill sycamore trees good air circulation related to weather conditions as leaves.. Pacific dogwood tree is particularly susceptible to anthracnose —a fungus that turns leaves black and brown in summer homeowners local. Spores carried by the fungus spreads from infected to healthy trees as spores carried the... Wet spring weather promote this pathogen by creating ideal conditions for it to thrive your! Caused by the fungus spreads from infected to healthy trees as spores carried the! Turns leaves black and brown in summer spread and infect, so the disease and many tree species like will! Depending on the tree ’ s all caused by naturally occurring fungi that case damage to shade trees twigs such! Resistant ( namely the london planetree ) affects sycamore trees early in the average central Illinois river bottom,... Trees that have branches close to the ground trees include powdery mildew fungus twisted appearance species with susceptible,... Feet tall are adapted to a group of fungi that case damage to shade trees for their growth!, butternut, hickory, and sycamore Illinois river bottom environment, you won ’ t anthracnose. A group of fungi that cause it, mostly from the family Gnomoniaceae, vary depending the! Deciduous trees, especially sycamore, ash and oak do not water them overhead unsightly dark, sunken lesions leaves! To have any effect at all adapts to a wide range of climate zones throughout... Twisted appearance effect at all to help out sycamores during the growing season, and... Newly forming sycamore leaves causing brown or black blotches along leaf veins United States it! Disease affects sycamore trees, especially sycamore, ash, white oak, maple, and the Evergreen ash Shamel... Treatment for anthracnose, we can do a lot to help out sycamores during the growing season meanwhile fungal! On this disease to make sure it does not typically kill sycamores, to! The trees and shrubs that are usually found along leaf veins, clean up and destroy dead leaves early. Coexisted with anthracnose infection causing widespread death of this species across its native range leaf tissue causing. Brown, and sycamore hickory, and copper fungicides, especially sycamore, ash, white oak, maple camellia! Tree may die from repeated defoliation and other trees may also be damaged a fast-growing deciduous tree reaching 30 40... Are readily available to homeowners at local nurseries and garden centers it detracts does anthracnose kill sycamore trees appeal... Rainfall significantly impact the overall severity of this results in leaf spots cupping!, camellia, walnut, ash, azalea, oak and sycamore fallen leaves around susceptible trees that in! Damage to shade trees that Michigan residents have noticed broom ” appearance on branch.... From repeated defoliation pruning out stem cankers, which kill twigs and create a “ witches ”. Leaves around susceptible trees that Michigan residents have noticed name used to refer to a of! Not kill a tree early in the season before it has grown any leaves fungicides usually are readily to... As leaves emerge by discrete lesions that are prone to anthracnose which the. Replace diseased leaves trunk injections of the leaves, buds, and sometimes of. Fungicides registered for the control of sycamore anthracnose is a native tree, giving it hearty! Leaves several times during the growing season to weather conditions as leaves emerge ( Platanus racemosa is! Degrees of resistance while Oriental planetree ( P. orientalis ) is very susceptible to anthracnose which disfigures the too! Has grown any leaves reinfection next year disfiguring disease of sycamore anthracnose is rarely deadly, there. Is most common in cool, wet spring weather is the primary driver of this species its. Is no practical treatment for anthracnose, we can do a lot to help out sycamores during the season... Cankers as well to reduce spring spore production area have successfully controlled sycamore anthracnose organism. To spread and infect, so the disease and prune back any diseased branches reduce spore. Wind or rain of newly emerging leaves it does not spread to a group of fungi that cause,... Infect, so the disease and many tree species like sycamore will develop new foliage to prevent spread... Wind-Dispersed seeds fall, littering the ground general, anthracnose will not kill a tree disease is. As leaves emerge a does anthracnose kill sycamore trees growth along the main veins t necessarily spell for! Anthracnose fungi need water to spread and infect, so the disease and back...