Anthracnose is common on ash, maple, oak and walnut. The fungus is killing tree-type dogwoods in the wild. Dogwood anthracnose is a relatively new disease to North America. Apply a fungicide during bud break to protect new flowers, twigs, and foliage. It causes damage to grasses and cereal crops, fruits and vegetables, legumes, perennial crops, and trees. on tree leaves and needles. (3) The dogwood twig borer (Oberea tripunctata Swederus) kills shoots, causing the leaves to hang on the tree as they may in dogwood anthracnose. Dogwood Anthracnose Download a PDF of this article Plants Affected. Additionally, fertilizer applied too late in the season can stimulate new growth, making the tree vulnerable to winter damage. 1). 3 August 2005. The fungus overwinters on corn debris producing spores that infect the next year’s crop. Damage usually appears as withering leaves on branch tips during the growing season. ... and protect the tree from mechanical damage. Dogwood anthracnose can affect all flowering dogwood species. reduce damage from these diseases. Landscape trees are usually in more exposed locations, where the disease cannot progress as rapidly and where it can be managed. Anthracnose control with fungicides is fur-Managing anthracnose with fungicides The future for anthracnose management looks brighter with new chemistries and an integrated management approach. damage. Leaf, fruit, and twig infections can also occur. The fungus Discula destructiva causes extensive damage in North America to the native Cornus species, which are an important landscape feature. Dogwood anthracnose is Flowering dogwood (Cornus florida) and the Kousa dogwood (Cornus kousa). We’re in the South Carolina Botanical Garden on the campus of Clemson University beside a very large dogwood, which in some years is gorgeous, with beautiful white blooms, but this year it has a disease known as spot anthracnose caused by the fungus Elsinoe corni . Healthy, vigorous growing trees should quickly recover. Dogwood anthracnose can affect all flowering dogwood species. Figure 5. Many but not all cultivars of Kousa dogwood ( C. kousa ) are very resistant ( C. kousa var. Robert L. Anderson, USDA Forest Service, bugwood.org Insect damage to dogwoods is very common. It overwinters in twigs and fruits, and spores infect the bracts in the spring if moisture is present. The fungi are dependent on the plant and sometimes plant part invaded. The fungus responsible for the damage is known scientifically as Elsinoë corni. This is an aggressive disease that can cause permanent damage and death of dogwoods. chinensis has been quite susceptible in some studies). Spot anthracnose is usually not a source of significant damage but can weaken a tree if it occurs for several years. This publication discusses anthracnose on the shade tree hosts most commonly affected in Kentucky: ash, maple, oak, and sycamore. Anthracnose is typically caused by fungi of the Colletotrichum or Gloeosporium genus, though there are many other genus groups of fungi that can cause this disease, and it … 3-5 (1 = very little damage 5 = plants killed) Hosts. Tomato anthracnose is caused by Colletotrichum coccodes, as an example. The main difference is that foliage affected by twig borer damage is clumped rather than scattered throughout the affected portion of the tree crown. Figure 6. Anthracnose leaf blight of corn. Dogwood Anthracnose: One of the very common diseases of dogwood trees is the dogwood anthracnose which is caused by the fungus Discula sp. While this is a common and unsightly shade tree disease, anthracnose is rarely fatal to a tree. Flowering dogwood ( C. florida ) is moderately susceptible but is severely damaged under conditions ideal for disease development. Frequency. When present on dogwood and sycamore, however, stem death, which causes malformation, is common. Under Attack. Dogwood (Discula) anthracnose. Today we’re going to talk about a disease on dogwoods known as spot anthracnose. Anthracnose causes serious damage to two species of dogwood in natural habitats: eastern flowering dogwood (C. florida) and Pacific dogwood (C. nuttallii). Virginia Cooperative Extension, Charlottesville/Albemarle County Office 460 Stagecoach Road, Charlottesville, Virginia 22902 phone: 434.872.4580 fax: 434.872.4578 ~~~~~ Anthracnose is a name for a group of diseases caused by several closely related fungi that attack many of our finest shade trees. Pacific dogwood (Cornus nuttallii) is very susceptible. The infection is manifested in the form of leaf spots and stem cankers. Both of these insects cause tip dieback. Other types of observed and reported tree damage As leaves … Closeup of damage caused by sycamore anthracnose. The fungus is not thought to be native to North America, but its origins are unknown. Dogwood anthracnose is a disease of flowering dogwoods caused by the fungus Discula destructiva. Spot anthracnose on dogwood in Holly Springs, NC (Wake Co.) on 04 April 2012. In the … On these trees it mainly causes leaf drop late in the season, and is thus not serious. Infected dogwood trees stand the best chance of surviving is the infection is caught early, before extensive dieback occurs. Trees exhibit signs of infection via tan, blotchy leaf spots. It was first observed in 1976 affecting a population of Cornus nuttallii in Washington state (Byther and Davidson 1979). General defoliation of sycamore caused by anthracnose. It was first observed in 1976 affecting a population of Cornus nuttallii in Washington state (Byther and Davidson 1979). Anthracnose diseases are most noticeable on trees in the landscape, but they also occur on trees growing in natural woodlots and forests. 1). These were also the species on which the responsible agent for the disease was discovered in 2003 in a nursery in Lombardy, Italy, and in a private garden in Germany. A destructive disease known as anthracnose can tarnish its image. Figure 7. There are several similiar fungi causing these diseases. Knowing more about what plants get anthracnose and how to prevent it can go a long way in successful anthracnose control. Dogwood Anthracnose. Dogwood anthracnose is a relatively new disease to North America. Other trees that can get anthracnose diseases include catalpa, dogwood, hickory, hornbeam, linden, and poplar. Anthracnose attacks twigs, branches, trunks and leaves of dogwoods in cool, wet weather. It can attack many different types of plants, from grasses to flowering trees such as dogwood. These were also the species on which the responsible agent for the disease was discovered in 2003 in a nursery in Lombardy, Italy, and in a private garden in Germany. 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