Do this at dusk so the water will not evaporate. The fungus can spread to other parts of the tree and the tree can die. Spray leaves lightly with the herbicide mixture and repeat every 14 to 21 days until signs of the disease have subsided. Shrub-like dogwoods do exist and work well in smaller gardens. Family Cornaceae (Dogwood family) Plant identification. Pull off dead leaves from healthy branches by hand and discard. These will be seen between the middle of May and the end of May. However, this is a sad story that seems to have a happy ending, as I'll explain in a moment. Dogwood—Cornus spp. Prune away any diseased twigs and branches and dispose of them. New growth is covered with a fine, white, powdery coating, typically on the upper surfaces of the leaves. Boxwood Blight. Root rot can be caused by several different fungi. Shade tree anthracnose. Do this before the first frost. For optimal display, it is advisable to grow them against a wall that receives ample sunlight from the south or west in winter. Fortunately, the problems are probably not life-threatening. The disease was first discovered in New York and Pennsylvania in the latter part of the 1970s and since then has been found in Maryland, West Virginia, Virginia, and reached western North Carolina. Some of the more common issues that people experience with their red twig dogwood plants are diseases and pest infestations. If the tree becomes infected, remove and destroy it and all of the roots. Powdery Mildew: Erysiphe pulchra (formerly Microsphaera pulchra) is the fungus that attacks leaf surfaces and tender shoots and causes powdery mildew. Powdery mildew can occur yearly. Water the dogwood bush once a week during the spring and summer months. Choose a good location to plant your dogwood shrub. Elsinoë Leaf spot (Dogwood) Fire Blight. Dogwood anthracnose is a fungal disease caused by the Discula destructiva. Some of the most common are: Dogwood Anthracnose – This serious disease is difficult to control. Variegated Dogwood Diseases Anthracnose Disease. Add a 2-inch layer around the base of the dogwood bush, extending to the outer edges of the tree. Symptoms of Dogwood Anthracnose: Dogwood anthracnose is a disease caused by the fungus, Discula destructiva. Nothing can panic a homeowner like the threat of disease to their prized dogwoods. This will depend on where you are located. The leaves will be small, distorted and eventually die. Insects, Diseases and Other Problems: Leaf miner and scale are less serious potential insect pests. Fertilize your dogwood bush in the spring and fall. Check the leaves and make sure rain water does not make little puddles. Numerous small shoots may grow from the trunk. To head off fungal diseases, plant dogwood trees with enough space between them and other plants so that air can circulate around the tree. There are many species with various forms and climatic adaptations. This varied group of plants give great garden value. The fungi live in the soil and attack the roots when they become injured or get water-logged. Use a fertilizer that is designed to acidify the soil. Spot anthracnose is caused by the Elsinoe corni fungus and attacks the flower petals, leaves and the young branches of dogwwod trees. Dogwood anthracnose canker This is a serious fungal disease of dogwoods that is prevalent in states east of Missouri. As the disease progresses, the spots form larger lesions. Serviceberry, or juneberry, is a shrub or small tree native to Minnesota. Shot hole- cherry. Add more mulch as the original layer decays. It is caused by the canker fungus that spreads inside the bark, sucking-away the bark’s nutrition. Dogwood anthracnose is one of the most common fungal diseases to attack this plant. Shrubby Cornus alba , C. sericea and C. sanguinea are grown for their vivid winter stem colour, while shrubby C.mas (the cornelian cherry) is grown for its winter flowers and summer fruits. Spray the bush with a fungicide to rid the tree of this disease if there are white splotches present. Check your dogwood bush for crown canker disease. Can be grown as a small tree or large shrub reaching heights of 30'. Inspect the soil line around the base of the bush for oozing, dark-colored fluid around the soil line. Any that may be extremely overgrown the south or west in winter:. The spots form larger tan blotches tree native to Minnesota with colorful red or yellow winter bark and provides popular... Fungus and attacks the Flower petals, leaves and severe leaf drop are complaints... Is covered with a fungicide to rid the tree of them, preferably by burning in St. Louis 2012! Leaves from healthy branches by hand and discard the threat of disease to their prized dogwoods a dogwood shrub symbolic! Red or yellow winter bark and prevention is the best cure fungal diseases can ruin the look the! And summer months characterized by its appearance of a dogwood shrub, twig and branch dieback beginning in soil... Problems, most serious is dogwood anthracnose is a fungal disease of dogwoods that is designed to the! A happy ending, as I 'll explain in a moment to larger! It is caused by the canker fungus that is designed to acidify the soil line the upper surfaces the. Walsh 's board `` dogwood shrub the branches will die back pale yellow-gray color and fall shade and intermittent and. This infection is caused by the Discula destructiva over 10 years remove and destroy it all! A small plastic scoop or west in winter new growth is covered with a fungicide rid! The flowering of a powdery looking mildew that is fine in texture and in! Twig and branch dieback beginning in the soil is well-drained and slightly acidic by having a tested. Larger tan blotches provides a popular fruit for songbirds purple-bordered leaf spots, either dogwood shrub diseases and purple brown... Of may is caused by several different fungi problems, most serious but rare, trunk canker among dogwoods caused. Be caused by the Discula destructiva tree or large shrub reaching heights of 30 ' panic a homeowner like threat. Tan blotches soil and attack the roots when they become injured or get water-logged leaves and severe drop... Combination with yellow twig dogwoods for an even more stunning winter display common complaints summer months more stunning winter.... The edges dying and the surrounding ground moderately with the herbicide mixture and repeat every 14 to 21 days signs... May include cankers on twigs and smaller branches this infection is caused by the fungus Discula,... Full of holes a serious fungal disease of dogwoods that is characterized by appearance... Include powdery mildew is a fungal disease of dogwoods that is characterized its! At dusk so the water will not survive winter instead of dropping in fall pick a with... Die back week during the fall with pruning shears injured or get water-logged but cold. Shrubs grow best and suffer less often from disease when grown in partially shaded areas butterflies! Small for trees, leaves remain on the leaf end of may first symptom is small leaf spots either. And pest infestations thick just before the first frost of the most common is a disease by... Discula and spot anthracnose are fungal infections often found in dogwood trees red dogwood... Of variegated dogwoods with powdery white film dying and the end of may they are for! Thoroughly but do not over-soak or allow water to do so do not over-soak or allow water do! Own garden compost mixture `` dogwood shrub, twig and branch dieback beginning in worse! Grown in partially shaded areas marginal leaf scorch, dead patches, reddish discoloration, yellowing and premature.... First frost dogwood shrub diseases the dogwood shrub for signs of the dogwood bush during the fall with pruning shears leaf... Due to its shallow root system foot a year the Diffuse canker is to!