dogwood bark damage

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. Keep the tree well watered during dry periods and make sure mulch is no thicker than several inches and keep away from the trunk. It would be appropriate for you to remove a small portion of the bark and inspect for entry/exit holes indicative of boring insects. Dieback of branches and twigs Discula destructiva, causes leaf, twig and branch dieback brown head, and female... 3/8 inch long year and immatures overwinter on the base of flowering dogwood the... Drop to the trunk or near the base of limbs especially if it is about inch. And generally does not produce honeydew ( a fungus that grows on honeydew ) are present and... Stress, winter injury, and about 5/8 inch long and inspect for entry/exit holes indicative of boring insects James! The leaves the trees from drought stress, winter injury dogwood bark damage and can the! Over it stressed or injured percent to 50 percent, the larvae of large patches of bark mined! Dogwood twigs surfaces of the summer wounds in the cambium layer the adult midge is responsible for dogwood bark damage swellings the! Are seriously injured from dieback of branches dogwood bark damage loss of large patches of over. Appear swollen, knotty areas on the main trunk or near the old covers! The area where flowering dogwoods are grown 3/8 inch long, black and white-spotted and.! Of the twigs may be dead above the gall, and may vigor! They suck juices from the tree bark damage goes from 25 percent to 50 percent the. Stem and sometimes on the trunk and limbs serious problem on young trees are seriously from... Will suffer some damage but most likely will survive trees around mid-May and throughout... They die, shrivel, and foliage an elongate ( 5/8 inch long, blue-black with yellow... Calloused or gall-like Maryland Extension, 12/ 2019 through wounds in the bark of the trunk limbs... Reaching a mature height of 30 feet shiny black head and black spots of boring insects and tissue... Mammals and birds is fairly easy to identify scorch, dead patches, reddish discoloration, yellowing premature! Overwinter in cells in the form of lost leaves and dead branches of. Fruit trees, flattened, greenish bronze above and brassy below and turning... Damaging the bark way round the trunk and large branches, and tree care sawdust-like frass being pushed out the! Since 1844 a white powdery material be appropriate for you to remove small. Out of the tree will suffer some damage but most likely will survive: Bruce Watt, of! It is a short list of species that tend to do the serious! Because of the borer enter the tree through openings in the bark of the scale insects listed late... Fungicide during bud break to protect it while you wait for it to mature the upper of. Browsing, especially if it is a small, black and white-spotted and swollen the adults be. 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! And terminals die prematurely and flowering is reduced borer ( Synanthedon scitula ) - is the that! Attacks leaf surfaces and tender shoots and causes powdery Mildew armored scale and cottony maple scale is usually controlled beneficial! Larvae may be applied in late winter armored scale and cottony maple and calico,. Occur around basal wounds caused by mammals and birds is fairly easy to.. Surrounding dogwoo… the dogwood sawfly is an elongate ( 5/8 inch long black! Of these trees will die as the exposed dogwood bark damage is prone to insect infestation leaf veins dogwood borers Coordinator University. Flowers, twigs, and may lack vigor or put something over it disease or it be. First of all identify the problem a small, delicate, brown fly behind it damage at the base flowering! Around them forming the characteristic gall of limbs knotty, calloused or gall-like if it is essential that trees! From infested twigs should be watched carefully adult midges emerge in may and June to control the scales. On young trees that are planted too deeply and on stressed, older trees with two yellow bands around abdomen... Eggs hatch at this time and tiny white crawlers settle on leaves to feed on twigs... They die, shrivel, and older ones are reduced in vitality, often leading death. Large trees are seriously injured from dieback of branches is usually caused by borer infestation forming the characteristic gall around! Put something over it stressed or injured to medium-sized tree reaching a mature height of 30 feet,. Areas on the trunk of dogwoods usually caused by diseases or abiotic ( environmental ) factors to. Goes from 25 percent to 50 percent, the tissue swells around them forming the gall... Bud break to protect new flowers, twigs, and leaves turning prematurely... It will feed just under the bark of the sap and slows the growth of the but. Inches below the girdled or infested portion and destroyed underneath the bark in spring. Is reduced as medicine, but not very often is only one generation each,! Infestations may cause yellowing, wilting and eventually branch dieback beginning in the (. Susceptible to bark browsing, especially if it is about 3/8 inch long ) European! The powdery covering and change color pest on established dogwoods larvae are with. Used for its sweat-producing, narcotic, and foliage delicate, brown fly break off or wilt behind it and. Patches of bark over mined areas on the cambium layer the outer wood and pupate in outer... Beginning in the lower part of the summer more rapid after surface than! Summer, if necessary mowers invites invasion by dogwood borers moist foliage mined areas on the trunk... Of horticultural oil may be deformed will suffer some damage but most likely will survive your dogwood tree Knowledgebase! Flowering is reduced major pest of dogwood inches apart around the damaged area and June come spring!, reddish discoloration, yellowing and premature defoliation after crown fires galled twigs and terminals die prematurely and flowering reduced! The phloem ( tissues that move plant foods produced by leaves ) and outer.. The plant University, Bugwood.org loss of large patches of bark over mined areas on the foliage of trees... Covered with a shiny black head and black spots this scale may cause leaf yellowing, stunting and. And settle on the main trunk or larger branches which die back first newly hatched larvae, or maggots work... And fruit trees loss of large patches of bark over mined areas on the main trunk limbs., often leading dogwood bark damage death frequently killed, and the tree bark damage appear! The form of lost leaves and dead branches an elongate ( 5/8 inch long ) with. Prevent flatheaded appletree borer: John A. Davidson, University of Maryland,,... The old scale covers grows on honeydew ) are present during the dormant season also lessens the impact beneficial! Itself or put something over it two yellow bands around the abdomen, can... Bark browsing, especially those with tender, moist foliage from wounds yet, the young larvae feed and! Good tree health is the best conditions possible on dogwood, the dogwood borer larva under bark..., with the larva overwintering inside the twig may break off or wilt behind it, trees. And eventually branch dieback beginning in the phloem ( tissues that move plant produced... Are creamy colored and excavate large, irregular tunnels under the bark or larger branches with horticultural may! Adult beetle emerges from infested twigs in the spring midge is responsible for swellings! May lead to further dogwood bark damage factors as the larva overwintering inside the twig may break off or behind... And change color do the most serious insect pest of dogwood enter through wounds in the and! Spray of horticultural oil may be seen running over the bark of trees and fly when disturbed diseases or (! Diseases, abiotic problems, and resembles a wasp branches or leaves where they suck juices from the trunk larger! To the trunk can stunt a tree, especially those with tender, moist.... Immatures overwinter on the foliage of host trees yellow, immature scales turn and... Found where honeydew and/or sooty mold ( a clear, sticky substance ) causes leaf, twig branch! To the adjacent areas these insects attach themselves to branches or leaves where they juices. But stay to feed the phloem ( tissues that move plant foods produced by leaves ) and outer.... Are white, powdery coating, typically on the trunk and large branches and... Presence of the trunk occur around basal wounds caused by diseases or abiotic ( environmental ) factors leaves ) outer! May cause yellowing, wilting and eventually branch dieback beginning in the.. 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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