View our privacy policy. Care and Maintenance. Discula anthracnose is a more serious condition that causes large unsightly blotches and burnt leaf tips. Joined: Jun 15, 2011 … These types of root rot are best controlled through preventative measures. This is a suckering shrub that typically grows to 5-7’ tall by 6-8’ wide. Apply a fungicide to protect new leaves during bud break. Variegated version of ‘Celestial’; foliage is green splashed gold, turning orange and red in fall. Trees-Acacia. It also has more tolerance for alkaline soil than does flowering dogwood. Home. It can also become vulnerable to borers. Q. I have a dogwood tree in my yard I'm really concerned about. The first two cause aesthetic problems, but Discula anthracnose can kill branches and even entire trees. Spores are spread by wind to surrounding dogwoo… Seashell pink flowers smother the branches in spring, followed by decorative bright red fruit The most common diseases afflicting variegated dogwoods are the result of fungal infections targeting the leaves or roots of the plant. You must have JavaScript enabled in your browser to utilize the functionality of this website. Each leaf is edged in white, with overlapping hues of green and white, turning a brilliant red-purple in the fall. Plant disease-resistant cultivars of flowering dogwoods. If it is how do I cure these shrubs? Spot anthracnose is a relatively mild disease that results in blotches less than 1/8 inch in diameter on the dogwood's leaves and flowers. Dogwood Borer Damage at the Base of Flowering Dogwood. Leaf spots are circular to angular, dark-purple areas less than 1/32 inch in diameter and often drop out, leaving shot holes. Wedding Cake Tree, Giant Dogwood, Variegated Giant Dogwood. Care and maintenance. Other diseases include powdery mildew, leaf spot, canker, root rot, and leaf & twig blight. Many cultivars of variegated dogwood have increased resistance to fungal infection and are better suited for wet areas or soils with poor drainage. Advanced cases of powdery mildew are best treated with a fungicidal spray applied to the leaves of the tree. STELLAR PINK HYBRID DOGWOOD (Cornus X rutgersensis). Apply a fungicide during bud break to protect new flowers, twigs, and foliage. Leaves, stems, and fruit can also become infected. Symptoms of the disease include leaf spots, either small and purple or larger and light brown. Variegated Yellow Twig Dogwood cultivar that is primarily grown for its bold variegated foliage and its yellow winter stems. Numerous diseases affect variegated dogwood shrubs, such as powdery mildew and leaf spots. Common flowering dogwood pests and diseases . Lower twigs and branches die. Some of the most common are: Dogwood Anthracnose – This serious disease is difficult to control. The first symptom is small leaf spots with purple halos, which may expand to form larger tan blotches. Variegated Dogwood Diseases. When stressed, is susceptible to a large number of disease problems, most serious is dogwood anthracnose. Dispose of litter separately from your compost pile, as disease can overwinter in infected material. White fungal growth develops on the surface of leaves late in the summer and during the autumn. Cornus. Reddish-brown dead spots occur on the flower bracts. Variegated red twig dogwood has disease---help!!!!! Powdery mildew is a fungal disease that covers the leaves of variegated dogwoods with powdery white film. I thought it was drought stressed, so this season I really kept on top of watering it with a soaker hose. Other diseases include powdery mildew, leaf spot, canker, root rot and leaf & twig blight. Is that possible here in Colorado (Denver Metro)? When you're seeking a plant for shady areas (partial, open shade), consider one of the excellent cultivars of pagoda dogwood (Cornus alternifolia), such as 'Golden Shadows,' with brightly-colored variegated leaves. Seashell pink flowers smother the branches in spring, followed by decorative bright red fruit I have googled it and it looks like anthracnose disease. Erysiphe pulchra and Phyllactinia guttata. Variegated Red Twig Dogwood. Family Cornaceae . This fungal disease can weaken and even kill a dogwood over time. It was planted about three years ago in what I now realize is a very hot afternoon sun location (probably not ideal). Small, reddish-brown spots without brown centers may pepper portions of the leaf or extend along veins. Informational table showing disease name, symptoms, pathogen/cause, and management of Dogwood diseases. I have googled it and it looks like anthracnose disease. Cornus kousa is a small deciduous tree 8–12 m (26–39 ft) tall, in the flowering plant family Cornaceae.Common names include kousa, kousa dogwood, Chinese dogwood, Korean dogwood, and Japanese dogwood. Cultivation problems roots of variegated dogwoods with 1/4 inch in diameter and often drop out, leaving shot holes a... Wide purple spots late in the ailments that are native to the leaves many. He attained a Bachelors of fine Arts in English literature from Eastern Kentucky University many Portland gardeners HOW to the. And dogwood club gall midges this disease occurs only if weather conditions very., more interesting than that of flowering dogwoods by causing spotting and distortion of (., raised, pimple-like fruiting structures form on leaves is not too dry northern United States about 25 ago. A disease-resistant cultivar to reduce the chance of mildew, leaf spot, crown canker, root,... 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