Other species of dogwoods such as Kousa dogwood ( C. kousa ), Tatarian dogwood ( C. alba ), and Redosier dogwood ( C. sericea ) are resistant to this disease and are a good option for landscapes that are prone to dogwood anthracnose. Flowering dogwood ( C. florida ) is moderately susceptible but is severely damaged under conditions ideal for disease development. Dogwood Anthracnose: Discula destructiva This disease of Flowering Dogwood (Cornus florida) ... consider using resistant varieties. If you see signs of infection, treat the area with insecticide spray and horticultural oils. The fungus Elsinoë corni causes a spot anthracnose primarily on Cornus florida. The first trees in this series were created by crossbreeding kousa dogwood with native eastern flowering dogwood trees. Results of 1991 anthracnose resistance screening study.1 Materials and Methods Trees were grown in 5-gallon containers in a composted bark mix commonly used in the pro-duction of woody ornamental species. Keep your dogwoods healthy with these tips. Anthracnose is a term applied to an array of fungal diseases that affect shade trees. It is believed to have started in the northeastern United States about 25 … Dogwood anthracnose is not all that common, only occurs at 1800 feet or higher elevation. Table 1 shows the relative susceptibility of some landscape trees to anthracnose. Anthracnose Resistant Dogwoods C. florida cultivar ‘Appalachian Spring’ Dogwoods Bloom, and Music Echoes April 15, 2005 Recent progress has been made in developing dogwoods that resist disease -- especially anthracnose and other fungal attackers. One popular line of hybrids is the âstellar series,â which began to appear outside of American homes in the 1990s. Most resistant to dogwood anthracnose is Cornus kousa (and its slightly larger version, C. kousa variety chinensis). We can periodically inspect your tree for signs of disease. During the fall, the leaves will change from green to brilliant red and purple colors, ensuring the tree boosts the curb appeal of your property year-round. The fungus has caused extensive mortality of dogwoods in portions along the East Coast into the Southeastern United States since it was first discovered in the early 1970s. With our help, youâll have healthy, beautiful dogwood trees brightening up your property for many years to come. 0000001163 00000 n Most resistant to dogwood anthracnose is Cornus kousa (and its slightly larger version, C. kousa variety chinensis). Known for its beautiful flowers, which bloom in a splendid variety of cheerful colors, a dogwood tree will bring a touch of real joy anywhere it grows. Anthracnose attacks twigs, branches, trunks and leaves of dogwoods in cool, wet weather. 0000000628 00000 n Anthracnose is a fungal disease that affects plants by forming dead areas on leaves and fruit. As with the trees itâs bred from, it will turn lovely red and purple colors during the fall. Several "stellar" hybrid crosses between C. florida and C. kousa are quite resistant to the disease. Flowering dogwood (Cornus florida)is a small Maryland native tree with white or pink flower bracts in the spring, colorful foliage in the fall, and berries that support wildlife. Dogwood Anthracnose is a very common and visually unappealing disease to which the Cornus florida is extremely susceptible. Spot anthracnose is more common. Another option that you have when searching for a dogwood for your property are hybrids. Prune dogwoods and surrounding plant material to increase air circulation. Here are three of our favorite disease-resistant dogwood trees: A particular variety of Cornus florida that has been bred for, among other qualities, its resistance to dogwood anthracnose and powdery mildew, the Appalachian spring dogwood blooms every spring with gorgeous white bracts surrounding yellow flowers. Anthracnose attacks twigs, branches, trunks and leaves of dogwoods in cool, wet weather. resistant elm cultivar 'Christine Buisman' con-tracted a case of Dutch elm disease (3). trailer << /Size 35 /Prev 311415 /Info 19 0 R /Root 21 0 R >> startxref 0 %%EOF 21 0 obj << /Type /Catalog /Pages 22 0 R >> endobj 22 0 obj << /Type /Pages /Kids [ 23 0 R 1 0 R 7 0 R 13 0 R ] /Count 4 >> endobj 33 0 obj << /Length 34 0 R /S 56 /Filter /FlateDecode >> stream The shallow root system will benefit from a layer of mulch to maintain a cool root environment. 0000000903 00000 n It commonly infects the developing shoots and leaves. Dogwood Anthracnose Information Dogwood blight, also known as dogwood anthracnose for the fungal pathogen that causes the disease, is a fairly new problem. 20 0 obj << /Linearized 1 /L 311869 /H [ 716 187 ] /O 23 /E 92423 /N 4 /T 311425 >> endobj xref 20 15 0000000016 00000 n 84 Brown et al. Stellar pink dogwood is great for attracting butterflies and other beneficial insects. It is found mainly on the native dogwoods, especially Pacific dogwood, but can also infect some ornamental dogwoods. And then later again in 1978, it was found in the northeast of the USA. Today weâre going to talk about a disease on dogwoods known as spot anthracnose. The following list is presented in most susceptible to least susceptible: Pacific dogwood (Cornus nuttalii), flowering dogwood (Cornus florida). The Appalachian spring dogwood usually reaches about 15 to 20 feet in height, with its branches reaching a similar width. 0000001185 00000 n 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. In full sun, dogwoods are more susceptible to dogwood borer. Breeding between flowering dogwood cultivars resistant to dogwood anthracnose ('Appalachian Spring') and resistant to powdery mildew ('Cherokee Brave') was conducted in cages where pollination was mediated by honey bees (Aphis mellifera). taxa were found to be immune to dogwood anthracnose, yet there was considerable variation in resistance to the disease. Download Pest Sheet . 'Appalachian Spring' – large white bracts; red fall foliage; resistant to dogwood anthracnose. Another small tree that is sure to dazzle visitors year-round is the kousa dogwood (Cornus kousa), a native of Japan. One of the most popular of these crossbreeds is the stellar pink (Cornus florida x Cornus kousa), which has become famous for the large, pink bracts that surround its flowers. The following list is presented in most susceptible to least susceptible: Pacific dogwood (Cornus nuttalii), flowering dogwood (Cornus florida). Research Plant Pathologist, Brooklyn Botanic Garden Research Center, 712 Kitchawan Rd, Ossining, NY 19562. This species of dogwood is anthracnose resistant, and for this reason, kousa dogwood is being widely planted as an ornamental tree in areas affected by the disease. Trees are also susceptible to powdery mildew, leaf spot, canker, root rot and leaf, and twig blight crown canker, bacterial leaf scorch, powdery mildew, septoria leaf spot. Japanese dogwood ( Cornus kousa ) is a popular alternative that is resistant to Anthracnose. Symptoms/Damage Leaves While itâs a popular and beautiful tree, populations have been devastated by fungal infections. 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