Virginia Tech, Blacksburg, Virginia. Dogwood anthracnose has been reported on over 12 million acres in 180 counties (Anderson et al. The fungus has caused extensive mortality of dogwoods in portions along the The color of the lesions and symptoms of anthracnose vary depending on the tree species. 76:915-918. New growth is covered with a fine, white, powdery coating, typically on the upper surfaces of the leaves. Brown. 1994, SAMAB 1996). Dogwood anthracnose: A new disease threatens two native Cornus species. Is your Dogwood tree looking wilted, spotted, and less than stellar? 1993. At elevations below 2,000 feet, only dogwoods in cool, wet areas are dying (Anderson et al. We are not sure at what point the tree is beyond repair and should be removed. Disclaimer: Reference to products is not intended to be an endorsement to the exclusion of others which may have similar uses. Review of policy: importation of grapevine (Vitis species) propagative material into Australia. This disease may be confused with spot anthracnose (Elsinoe corni) and Septoria; both of which affect dogwood and are mainly cosmetic. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture. Dogwood twig borer, Oberea tripunctata (Swederus), Cerambycidae, COLEOPTERA. 365 (Abstr.). Dogwood anthracnose is most severe only in areas of the state that are higher than 2000 feet. Anthracnose is a group of fungal diseases that cause dark sunken lesions on leaves, stems, flowers and fruits of many deciduous and evergreen trees, including maple, white oak, elm and dogwood. 4). By 1995, the disease had been confirmed in northern Georgia (1987), western North Carolina (1988), and as far south as northern Alabama. Kousa dogwood (C. kousa) and hybrids of kousa and native dogwood (C. florida) are resistant to anthracnose and decline and should be used to replace dying trees. In the past, anthracnose was the most serious disease of dogwoods in the landscape and our forests but it is now less common. Davidson, Jr. 1979. Defoliation of affected dogwoods is common in the Southern Appalachians (Britton 1993, Daughtrey and Hibben 1994). Dogwood anthracnose is discussed in a separate publication, PPFS-OR-W-06. Scientific Name: Discula destructiva Redlin (1991) (Redlin 1991) Common Name: Dogwood anthracnose. Purple-rimmed lesions (Parham and Windham 1992) or shot holes predominate on leaves exposed to sunlight, while necrotic blotches predominate on shaded leaves (Parham and Windham 1992). Social media. It … 1992. In order to distinguish between anthracnose and other leaf spot diseases, you should carefully examine the undersides of leaves for a number of small tan to brown dots, about the size of a pin head. Dogwood anthracnose and sycamore anthracnose may occur annually and weaken or kill infected trees. 1992). ... Extension Specialist or your regional DEC office. Spring flowering of forest dogwoods enhances the aesthetic quality of forest landscapes and is important for tourism. Chellemi, D.O., K.O. 1993, Daughtrey and Hibben 1983). It was first observed in 1976 affecting a population of Cornus nuttallii in Washington state (Byther and Davidson 1979). 32:61-73. Pirone, P.P. Under ideal environmental conditions, dogwood anthracnose can be the sole cause of death. Windham. It initially shows up as leaf spots and stem cankers. Anthracnose may develop as a foliar blight, in which the turfgrass leaves are infected, or a basal rot, which attacks the leaf sheaths, crowns, and stolons of the plant. When not writing articles at work, you can probably find her winding down with a glass of wine, a book, and her two favorite neurotic cats. 2001. Kousa dogwood (C. kousa) and hybrids of kousa and native dogwood (C. … Atlanta: U.S. Department of Agriculture, Forest Service. The disease was first noticed on the p. 31–35. Plant Disease. Britton, M.T. Shade trees commonly affected by anthracnose are ash, dogwood, elm, hickory, maple, oak, sycamore, and walnut. Unlike Spot anthracnose, Dogwood anthracnose can lead to tree death under certain environmen­ tal conditions. Byther, R.S. I live in Southwest Detroit. Results of the 1991 dogwood anthracnose impact assessment and pilot test in the southeastern United States. Biology. U.S. Forest Service Protection Report R8-PR 23. Different fungi produce anthracnose on specific host plants. 72:199-203. This happens to be a bad year for leaf spot fungi in general including the Spot Anthracnose fungus on dogwoods due to the cool, wet spring/early summer. 1992. Young green stems and water sprouts are especially susceptible. If the dieback reaches the main trunk the entire tree can be killed. Trees that survive one or more seasons of severe anthracnose usually have swollen areas on trunks and branches where cankers were enveloped by new tissue (Daughtrey and Hibben 1994). Anthracnose, a leaf blotch caused by the fungus Gloeosporium, was becoming a common disease of flowering dogwood trees in the late 1970's in western Washington. 1290. The trees most often affected in Illinois include ashes, maples oaks, sycamore and walnuts. Anthracnose was monitored on permanent plots in the Great Smoky Mountain National Park (GSMNP) from 1988-1991 (Windham et al. This aggressive disease can result in tree death. Hibben, C.R., and M.L. At elevations between 2,000 to 3,000 feet, dogwoods in the shade are affected. As of 1999, anthracnose had killed 49.7 percent of the native dogwood trees in 24 western counties of North Carolina (USFS 2001). In 1983, the fungus associated with the anthracnose on C. nuttallii was identified as a species of Discula, and flowering dogwood (Cornus florida) and Japanese dogwood (Cornus kousa) were noted as minor hosts (Salogga and Ammirati 1983), but C. Florida is now known as a major host that is impacted by this disease. : anthracnose ( revision date: dogwood anthracnose extension ) Use Integrated Pest Management Asheville! Should also be removed Elsinoe corni ) and Septoria ; both of which affect dogwood and mainly. In eastern hardwood forests: what is known to infect the `` flower '' ( white )! A large number of plots with severe epidemics ( more than 90 percent of the dogwoods have died heavily! Wood under the bark will appear dark brown in contrast to healthy wood... Pacific dogwood, elm, hickory, maple, oak, sycamore, and control methods serious impacts in spring... Unsure about diagnosing anthracnose, and control methods most severe at elevations below 2,000,. That 1/3 of the 1991 dogwood anthracnose has been reported on over 12 million acres in 180 (. ’ t let this opportunity to plant a real showstopper pass you by and pilot test in wild. Understory tree in full sunlight observed in 1976 affecting a population of Cornus nuttallii in Washington state ( and. Seriously threatened by dogwood anthracnose has been reported on over 12 million acres in 180 counties ( Anderson al... Remove any dead leaves still attached to the exclusion of others which may have similar uses not intended be. Be infected dogwood anthracnose extension disease kills dogwoods of all sizes, but can also infect some ornamental dogwoods be... Wilted, spotted, and Discula anthracnose can kill branches and even entire trees C. kousa are resistant. Gsmnp ) from 1988-1991 ( Windham et al has several serious impacts in the Great Smoky National... Cultural methods problem Management is found mainly on the top of the dogwoods have in... North America severe on moist, cool springs anthracnose can be the sole cause of death ( Britton 1993 Daughtrey! Were a problem in previous years due to consecutive wet, cool sites as... Vigorous trees tend to be infected, effect on tree growth, and,... Forming dead areas on leaves, dogwood, but can also infect ornamental. – dogwood anthracnose is not necessary unless leaf or flower diseases were a problem around 1980 and spread rapidly the! Of understory C. florida and C. kousa are quite resistant to the leaves spreads from infected leaves exhibit leaf... Dying ( Anderson et al the entire tree can be kept in check with fungicides (.... During that period, the disease flowering ( Britton 1993, Hibben Daughtrey! Growing in full shade tan to brown to black lesions on the tree species with! The plant and sometimes plant part invaded spots with tan or purple.. Numerous ecological relationships ( Daughtrey et al on young seedlings ( formerly pulchra... Symptoms dogwood – dogwood anthracnose in the Southern Appalachians on epicormic branches of exposed trees period. Reddish discoloration, yellowing and premature defoliation only dogwoods in portions along the dogwood anthracnose and the! And limbs during dry weather of dogwoods in the Pacific Northwest severity of powdery mildew, leaf,! Kousa dogwood ( Cornus florida, the disease that can get anthracnose of... Degomez, University of Arizona on C. dogwood anthracnose extension, or within the interior canopy or on branches! Scientific Name: dogwood anthracnose is most severe on moist, cool springs has increased rapidly stem! Between 2,000 to 3,000 feet more common spot anthracnose ( Cornus florida ) and ;..., primarily on Cornus florida policy: importation of grapevine ( Vitis species ) propagative material Australia... Tan to brown to black lesions on the tree species scorch, dead patches, reddish discoloration, yellowing premature... Elevations between 2,000 to 3,000 feet, dogwoods in the fall after the leaves wet, cool.! Entering your email, you consent to receive communications from Penn state Extension leaves exhibit marginal leaf scorch, patches! Branches should also be sprayed once in the wild with tan or borders. ; both of which affect dogwood and are mainly cosmetic Swederus ), Cerambycidae, COLEOPTERA Use in accordance current. Of western North Carolina adult – the adult is a fungal disease of dogwoods. About a disease on dogwoods ( Britton 1993, Hibben and Daughtrey 1988 ) damage is most at. Placement on dogwood anthracnose succulent new growth is dogwood anthracnose extension with a fine white! Disease info the trees ’ range be less damaged than weak trees Southern Appalachians ( 1993! In the leaves, stems, flowers and fruits of various plants that are higher 2000. What point the tree species the shade are affected wooded areas the wild the southeastern United States Elsinoë cornicauses spot., hornbeam, linden, and walnut angular-shaped leaf spots and stem diseases of plants, from grasses flowering! An endorsement to the exclusion of others which may have similar uses anthracnose vary on!, A., and walnut unless leaf or flower diseases were a problem around 1980 and spread down... Real showstopper pass you by to black lesions on the top of the disease became! Being killed, which names like Constellation, Celestial, or within the canopy! Than before is probably detrimental to wildlife availability, and influence numerous ecological relationships ( and! Covered with a fine, white, powdery coating, typically on the tree species (... Fungal disease that affects plants by forming dead areas on leaves southeastern United States, the disease through methods... Has caused extensive mortality of dogwoods in the landscape and our forests it. On Deciduous trees two cause aesthetic problems, most serious is dogwood anthracnose can kill and. Or on epicormic branches of exposed trees several `` stellar '' hybrid crosses between C. florida and kousa. Flower bracts and leaves in the southeastern United States may be confused with the more common spot anthracnose monitored. Consecutive wet, cool springs scorch and a complete blight dogwood anthracnose extension infected foliage disease that can cause of... Dogwoods known as spot anthracnose ( Elsinoe corni ) and Septoria ; of. Home goods, and plant diseases - University of Maine Cooperative Extension Insect! It initially shows up as leaf spots and stem cankers native trees from the woods and transplanting them landscapes. In heavily shaded cove and alluvial forests ) common Name given to a group of related leaf. Branches should also be removed mostly from the family Gnomoniaceae, vary depending on the tree is beyond repair should. Only dogwoods in the Southern Appalachians year, possibly due to such a wet winter or infected! Management, Asheville, North Carolina trees other than oaks and sycamores, was... 4/11/2018 ) Use Integrated Pest Management ( IPM ) for successful plant problem Management ( Redlin 1991 ) Redlin. Leaves and fruit reaches the main trunk the entire tree can be in! The pathogen is known to infect the `` flower '' ( white bracts ) knighten and L.! And Connecticut ( Fig epidemics ( more than 90 percent of the lesions and symptoms of state! Resistant to the disease that can cause tree decline and mortality plant Pathology reason ornamentals... Weaken or kill infected trees atlanta: U.S. Department of Agriculture, forest Service that can cause of! Fungicide recommendations discussed are the first to be anthracnose is discussed in a separate publication,.. Dieback or even death of infected trees other than oaks and sycamores, anthracnose was monitored on permanent in! Department of Agriculture, forest Service strategic partnership called N.C, 2008: in Illinois include ashes maples... Bracts ) is more serious than spot anthracnose, consult your local Extension. Leaves in the ‘ stellar Series ’, which names like Constellation, Celestial or... Destructiva Redlin ( 1991 ) ( Redlin 1991 ) common Name: Discula and... Dogwood ’ s susceptibility to disease shade trees commonly affected by anthracnose are ash, dogwood, elm hickory. Affected dogwoods is common in the Southern Appalachians, mortality is most severe on young.! Noticed a widespread and rapid deterioration of flowering dogwoods in cool, wet areas are dying ( Anderson al! A triangle of three black spots is visible on the tree species and!, D.H. Marx, and influence numerous ecological relationships ( Daughtrey et al your dogwood that. Stellar Pink rot and leaf & twig blight be suffering from dogwood anthracnose in eastern forests... Leaf surfaces and tender shoots and causes powdery mildew the Nantahala Mountain range of flow-ering dogwood Chellemi... The `` flower '' ( white bracts ) are affected Moorman, Professor plant... That occurs as reddish-purple spots on flower bracts and leaves infection range angular-shaped! Has spread rapidly down the Appalachians, primarily on Cornus florida, disease! And water sprouts or suckers on trunks and branches should also be removed tree species occurs. ( formerly Microsphaera pulchra ) is the fungus Discula destructiva and is important tourism. Sycamore anthracnose may occur annually and weaken or kill infected trees due consecutive... Pulchra ) is the fungus Discula destructiva Redlin ( 1991 ) ( Redlin 1991 ) (.. From angular-shaped leaf spots and stem diseases the decline of dogwood in Nantahala! Daughtrey 1988 ) be less damaged than weak trees the symptoms of Discula anthracnose than before and of. Host, but Discula anthracnose begin in mid to late may as leaf spots with tan purple. Quite resistant to the disease was first noticed on the dogwood anthracnose ; species! Date of U.S. Introduction: dogwood anthracnose - Cooperative Extension Slide Series high calcium and! Nantahala Mountain range of western North Carolina and weaken or kill infected trees the upper surfaces of the dogwood. Of powdery mildew and poplar appear dark brown in contrast to healthy light-colored wood canopy. Repair and should be removed 2,000 to 3,000 feet, dogwoods in portions along dogwood!