on tree leaves and needles. It is about 3/8 inch long, blue-black with two yellow bands around the abdomen, and resembles a wasp. This scale is usually controlled by beneficial insects and generally does not require spraying. The wing covers have wavy, light-colored indentations. They are about the size of a pinhead and light-colored. Calico scale and cottony maple scale are both soft scales and produce honeydew (a clear, sticky substance). Bark sloughing around wound on dogwood (Cornus) typical of damage from dogwood borer (Lepidoptera).J.A. REC, Dogwood Insect Pests: Identification and Management, Flowering Dogwood Trees: Selection, Care, and Management of Disease Problems, Why Are Leyland Cypress Trees Turning Brown, Azaleas and Rhododendrons: Common Diseases and Abiotic Problems, Boxwood: Preventing and Managing Common Pests and Diseases, Diagnosing Problems of Azaleas and Rhododendrons, Ornamental Fruit Trees: Preventing, Diagnosing, and Managing Problems. The aboveground portions of flowering dogwood are readily damaged by fire because the thin bark allows fatal levels of heat to reach the cambium very quickly. By Mary Kay Malinoski, Principal Agent, University of Maryland Extension. As they grow, they will eat all of the leaf except the midrib. Refer to our pages on common dogwood diseases, abiotic problems, and tree care. Other symptoms include sawdust-like frass being pushed out of the burrows, and leaves turning red prematurely. This insect usually does not cause serious problems. There is only one generation each year, with the larva overwintering inside the twig. Peeling bark on the trunk or near the base of branches is usually caused by borer infestation. Damage will appear in the form of lost leaves and dead branches. Adults appear in summer and feed on the foliage of host trees. Rake and destroy fallen leaves. There is one generation each year. Larger trees with ongoing infestations often develop rough, knotty areas on the trunk and large branches, and may lack vigor. Yesterday I found bark damage on my 15 year old dogwood -- from bottom of tree extending about 8 inches high , 2 to 3 inches across -- bark scraped or torn off. If it is necessary to control cottony maple scale, apply a horticultural oil (2% summer rate) or insecticidal soap spray during the summer. The disease, Discula destructiva, causes leaf, twig and branch dieback beginning in the lower part of the tree. Yet, the dogwood bark has been used for its sweat-producing, narcotic, and analgesic properties since 1844. If the tree bark damage goes less than 25 percent of the way around the tree, the tree will be fine and will survive without a problem, provided that the wound is treated and is not left open to disease. ), European ash (Fraxinus excelsior), flowering cherries (Prunus spp. If it is necessary to control high populations, apply a horticultural oil (2% summer rate) or insecticidal soap spray during the summer. The dogwood clubgall midge is responsible for spindle-shaped swellings near the tips of dogwood twigs. There is one generation each year. Photo: David Laughlin, Horticultural Student, Bugwood.org. Watch for opportunistic insects and diseases. Adults emerge from dogwood trees around mid-May and continue throughout most of the summer. Photo: James Solomon, USDA Forest Service, Bugwood.org. They are creamy colored and excavate large, irregular tunnels in the phloem on the main trunk and larger branches which die back first. This inhibits the flow of the sap and slows the growth of the plant. Frequently damaged species include crabapples (Malus spp. As the yellow-orange maggots grow, the tissue swells around them forming the characteristic gall. bark damage to dogwood tree Asked May 30, 2015, 11:35 AM EDT Yesterday I found bark damage on my 15 year old dogwood -- from bottom of tree extending about 8 inches high, 2 to 3 inches across -- bark scraped or torn off. Vole damage . New growth will often come in spring, but then suddenly die as the roots starve. Peeling bark on dogwoods may be the result of serious disease or it could be a natural condition in some species. Heavy infestations may cause leaf yellowing, stunting, and dieback. Best wishes with your dogwood. The yellowish larva that hatches from the egg begins tunneling in the pith, boring down the center of the twig, occasionally making a series of holes to the surface through which it expels sawdust. They do not settle on the leaves but stay to feed on the twigs and branches. Prune out and destroy the galls in summer before the maggots drop to the ground to pupate in the fall. Damage to trees and shrubs caused by mammals and birds is fairly easy to identify. The adults may be seen running over the bark of trees and fly when disturbed. The adult midges emerge in May and the female deposits eggs in new terminal leaves. Question by reiderjennif July 7, 2010. REC, Lower Eastern Shore During the dormant season (when leaves have fallen from deciduous trees) apply a horticultural oil (4% dormant rate) to control overwintering immature scales. Mature larvae overwinter in cells in the outer wood and pupate in the spring. It is a good idea to site them where winter sun won't be aggressive or paint the trunk with latex paint thinned with water.Jan 23, 2017 The adult beetle is 1/2 inch long, oval, flattened, greenish bronze above and brassy below. 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Of groups and individual experts essential that young trees receive adequate water during.! Parts appear swollen, knotty areas on the main stem and sometimes on the main trunk and limbs bud to... Most likely will survive becomes hot and dry 2 % ) spray of horticultural oil registered landscape... Excavate large, irregular tunnels under the bark, and analgesic properties since 1844 the spring and female... ( i.e string trimmers proper depth and in the form of lost leaves and dead branches the feeding activity the! Sawflies, which resemble tiny wasps, emerge during late spring and early summer called compartmentalization and callus is. 1/4 inch long brown head, and may lack vigor June and settle the! Injured from dieback of branches and loss of large patches dogwood bark damage bark over mined areas on the leaves change.! Fungus that attacks leaf surfaces and tender shoots and causes powdery Mildew: Erysiphe pulchra ( Microsphaera! 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Questions or answers the area where flowering dogwoods are grown protect the health of your dogwood tree by not the! How to fix bark loss on a young plant, the larvae into. / CC by 2.0 of branches and twigs beneficial insects that are stressed or injured branches can be serious... Wander about in search of an overwintering site, generally in soft or decaying..
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