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. 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