In the landscape, the disease can be kept in check with fungicides. Dogwood Anthracnose (Highly tolerant): C. Aurora®, Stellar® series (‘Rutban’, white) C. kousa x C . PropagationSow seed in a seedbed in autumn, or stratify and sow in spring. The following list is presented in most susceptible to least susceptible: Pacific dogwood (Cornus nuttalii), flowering dogwood (Cornus florida). Leaf and flower blight Irregular, brown, wrinkled patches form on flower bracts and leaves in the spring. Kousa Dogwood. The red fruits are edible, and they look like a big round raspberry. However, the cold hardiness of Kousa dogwood in Indiana is questionable. The following list is presented in most susceptible to least susceptible: Pacific dogwood (Cornus nuttalii), flowering dogwood (Cornus florida). Cornus kousa ‘Milky Way’ Milky Way Kousa Dogwood 25-30’ 20-25’ Profuse, white, pointed flower bracts in … However, this cultivar does not have resistance to powdery mildew. It infects and kills the leaves and young shoots of some North American Cornus species (dogwoods). Dogwood Anthracnose Discula sp. Kousa dogwood (Cornus kousa). Very colorful foliage in the fall and mottled bark. Widely cultivated as an ornamental, it is naturalized in New … The Shade Tree Laboratories considered it vital to examine any suspect trees in Massachusetts to see: a) whether they actually suffered from anthracnose, and b) whether, if so, they had a history of an unusual stress which might temporarily weaken or by-pass their resistance. The blotches are often at the tip of the leaf, triangular, and centered on the main vein. Several "stellar" hybrid crosses between C. florida and C. kousa are quite resistant to the disease. Dogwood anthracnose is a fungal disease of leaves and twigs. The causal agent is the fungus Discula destructiva, and as the name suggests, this pathogen is highly destructive. Dogwood anthracnose is a fungal disease of leaves and twigs. C. kousa also is considered a host, but leaf infection is generally minimal (Daughtrey et al. The kousa dogwood (Cornus kousa, Stellar series) is resistant but not immune to dogwood anthracnose but may harbor fungal inoculum that can perpetuate the disease. Spot anthracnose causes red spots on the foliage, but seldom warrants control. Dogwood anthracnose affects leaves, bracts, current-year shoots, localized areas of bark and cambium of the trunk or branches, fruits, and seeds of C. florida (Britton et al. The Kousa dogwood, an Asian species, is far less susceptible to dogwood anthracnose but the species is not a comparable food source for native insects and wildlife. 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. Dogwood anthracnose can affect all flowering dogwood species. And if so, what can I do about it? The blotches are often at the tip of the leaf, triangular, and centered on the main vein. It is also an important disease of Pacific Dogwood (Cornus nuttallii) in the West. Bloom occurs in late spring. After leaf out, typical symptoms include necrotic, distorted leaves and compromised flowering. Kousa dogwood is a slow-growing tree that will reach heights of 20 to 30 feet. Mar 25, 2016 - Kousa dogwood (Cornus kousa)...Alternative to the native white dogwood, anthracnose fungus resistant, has creamy-white flowers in June and a raspberry fruit. ProblemsNothing serious. kousa dogwood (Cornus kousa) and cultivars of hybrids be-tween flowering (Cornus florida) and kousa dogwoods were evaluated for susceptibility to dogwood anthracnose (Discula destructiva) and powdery mildew (Microsphaerapulchra). DOGWOOD ANTHRACNOSE . Dogwood anthracnose is. C. Ruth Ellen®, Stellar® series (‘Rutlan’, white) C. kousa x C. florida. The C. kousa is grown for its flowers in addition to its hardy, dependable nature. C. kousa has resistance to the dogwood anthracnose that is affecting many other Cornus species. Kousa dogwoods rarely suffer serious pest or disease problems. Conidiophores are … Cornus anthracnose is a fungal disease caused by Discula destructiva, which arrived in the UK from North America in the late 1990s. Symptoms Spot Anthracnose Thistypeof anthracnoseproduces. There are many beautiful and disease-resistant hybrids of flowering dogwood and kousa dogwood, but be mindful that these hybrids are sterile and don’t produce fruit. Like the other dogwood trees featured in this article, the kousa dogwood is known for its toughness. Dogwood anthracnose is considered the most serious disease of flowering dogwood (Cornus florida) in Connecticut and the Eastern Seaboard. Images of dogwood anthracnose symptoms . A number of crosses between C. kousa and C. florida have been made in attempts to produce the flowering characteristics of the Flowering Dogwood with the resistance of the Kousa Dogwood. Many but not all cultivars of Kousa dogwood (C. kousa) are very resistant (C. kousa var. 7 pictures total. chinensis has been quite susceptible in some studies). Conidiomata are acervular and subcuticular on leaves and twigs. ~~~~~ This fall Virginia Cooperative Extension will be offering Master Gardener training in Albemarle & Greene Counties. It is sometimes referred to as the Chinese dogwood. DOGWOOD ANTHRACNOSE Dogwood anthracnose is considered the most serious disease of flowering dogwood (Cornus florida) in Connecticut and the Eastern Seaboard. Resistant Dogwoods: Chinese dogwood, Cornus kousa is tolerant of Discula anthracnose and is recommended for nursery stock and replacement of dogwoods that have been killed by the fungus. 1993, Daughtrey and Hibben 1983). Birds devour the fruit quickly. kousa shows best in full sun or part shade, and fertile, moist but well-drained, sandy soil. Kousa dogwood (Cornus kousa) is considered resistant. The attractive C. kousa is native to Japan, China, Korea and Taiwan.. Bunchberry (C. canadensis), cornelian cherry dogwood (C. mas), and Japanese cornel dogwood (C. officinalis) are thought to be resistant. to be resistant to dogwood anthracnose. Symptoms of dogwood anthracnose include necrosis of bracts, leaf spots, necrotic blotches (Figure 1), wilted and curled foliage, dieback of twigs, leaf blight and cankers on trunks (4). susceptible to powdery mildew. leafspots, the centers of the spots on. Synonyms are Benthamia kousa and Cynoxylon kousa. 1996). Dogwood (Discula) anthracnose. that kousa dogwood might not, after all, be resis-tant. Some shade will improve performance in restricted soil spaces. The leaves display small to large irregular brown blotches or occasionally purple-edged spots. 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