dogwood borer damage

The dogwood borer is the most noteworthy pest of the tree. Several species of clearwing and flatheaded borers can infest landscape plants. The dogwood borer normally emerges several weeks later in June, but egg-laying can also continue until fall. Dogwood twig borer – Leaves wilt on individual twigs; girdled tips drop. 2 pictures total. Credits: UF/IFAS Figure 2. If you see signs of infection, treat the area with insecticide spray and horticultural oils. Photos by: James Solomon, USDA Forest Service, Bugwood.org. dogwood borer infestation of apple tree trunks that we are investigating is the use of trunk barriers made of novel materials, to directly protect the trunk surface from the ovipositing females and larval feeding. DESCRIPTION OF DAMAGE: Larvae feed in the inner bark of live, healthy dogwood trees. Dogwood borer – The bark is injured, with fine boring dust on the trunk and branches in late summer. Larvae live in the cambium layer and their travel and eating damage the flow of nutrients and water. Most insect damage occurs on the trunk and branches of dogwoods. It would be best to remove the tree, as it cannot be saved with that amount of bark loss. Any physical injury to the plant, especially by lawn mowers must be avoided. ), and dogwood borer larvae can develop in a wide range of callus or gall tissues on different trees, not just dogwood. The very small diameter of the trunk coupled with very small root mass can not outgrow sustained larval feeding, especially in years of low soil moisture (Spring 2015) and summer drought (Summer 2015). Dogwood Borer (Lepidoptera: Sesiidae) Flight Activity and an Attempt to Control Damage in ‘Gala’ Apples Using Mating Disruption Dogwood borer infests apple tree trunks by ovipositing on these burrknots, and their feeding damage often results in loss of tree vigor and shortened tree life. (and such good pictures!). While some are attracted to a range of hosts, most attack only certain kinds of trees and shrubs. Dogwood borer damage. 3. Adult female dogwood borer, Synanthedon scitula (Harris). The damaged area of the trunk or branch swells and eventually the bark will fall off. Damage at root collar on flowering dogwood (Cornus florida) from dogwood borer (Lepidoptera); note white larvae (caterpillars). Often branches can die. Whereas damage from bagworms results in defoliation as they consume foliage at incredible rates, the Dogwood Borer goes after the inner bark of live, healthy dogwood (as well as elm, pecan, willow and hickory) trees. 4. Once inside the tree, borer larvae are no longer vulnerable to insecticide sprays and are seldom detected until serious damage has been done. Larvae of the dogwood borer feed in the inner bark of live, healthy dogwood trees. Figure 1. 2. Feeding is initially confined to the burr knot, but it sometimes spreads to healthy bark outside it. Emerald ash borer larvae can develop in unrelated white fringetree (Chionanthus spp. Infested branches and limbs will die. Biology. The damaged area of the trunk or branch swells and eventually the bark will fall off. Dogwood borer almost never enter healthy bark or pruning wounds in apple trees. Barriers to dogwood borer oviposition may represent an effective, efficient, physical control method. Damage: Sloughing-off of bark, Crown die-back, General decline, Presence of borers is indicated by reddish brown frass and pupal cases on the surface of burr knots. Description of damage. This pest is also know as the elm twig girdler. ; The dogwood sawfly larvae feed on the foliage and the dogwood club gall midge causes spindle-shaped swelling on twigs. The larvae bore into the trunk and eat it from the inside out. Dogwood borer adult. Female dogwood borer's 4th abdominal segment is entirely yellow, while the male's is black with a narrow yellow ring. The gall will occasionally cause death of plant tissue nearby, and trees may be deformed by heavy infestations. Peachtree borer damage at soil line. Signs of infestation include dying leaves, holes in the trunk and dying branches. This borer not only attacks dogwood trees but also plants in the genera Prunus, Malus and other plant genera. Elm, viburnum, azalea, and many fruit trees may be attacked by the dogwood twig borer, though its principal host is flowering dogwood. Numerous scale insects are dogwood tree pests. Dogwood clubgall midge – Club- or spindle-shaped galls appear near the growing tips of dogwood twigs. The most damaging clearwing borers are associated with dogwood, lilac, ash, oak, rhododendron, and ornamental Prunus spe‐ Although insects often damage dogwood trees, the damage is usually minor. There are a number of different species, but the most damaging clearwing borers are associated with dogwood, lilac, ash, oak, rhododendron, and ornamental Prunus species, including flowering peach, plums, and cherries. Often Confused With . … Dogwood borer adults, female (top) and male (bottom). Below are some clearwing borers (Sesiidae) in our area: Dogwood borer damage. The dwarfing … Tree. Newly planted trees need to be braced for protection against wind. Dogwood borer have caused considerable damage to young establishing trees. The larvae are whi sh, hairless caterpillars with brown heads. Peachtree borer - Larvae resemble the Peachtree borer which are much larger and do not attack apple. You might want to spray your tree with an insecticide such as chlorpyrifos to prevent the borers from getting a foothold. Frequency. Describes the plants attacked by dogwood borers, the type of damage inflicted, methods of identification, life history, and control tactics to mitigate damage. In a single year one borer can completely girdle and kill a tree 10 cm in diameter, but death is more often brought about by the combined activity of several larvae and by successive infestations. at all, so they do not cause damage. We evaluated a combination of noninsecticidal alternatives to control trunk-damaging dogwood borer, Synanthedon scitula (Harris), consisting of novel barrier technologies, used alone or in combination with mating disruption. The dogwood borer is a common pest in the burr knots of apple trees on clonal rootstocks. Leaves turning red prematurely in mid-summer on a lone branch are an early sign of dogwood borers. Damage-On dogwood, attack is apparently confined to the trunk and limbs. Some notable successes are observed with borers, such as the peachtree borer … Wasps - Adults resemble wasps. Leaves turning red prematurely in mid-summer on a lone branch are an early sign of dogwood borers. Damage from the club gall midge can be seen in the form of galls that are typically 1/2 – 1-inch in size. ADDITIONAL INFORMATION . Persistent infestations over several years can contribute to a slow decline in a tree’s vigor and reduced yields. Infested branches often die or they are so weakened that they break off easily. Most dogwood decline is caused by drought or powdery mildew or grass growing beneath the tree….but you definitely have twig borer doing damage to the limb. In addition to the dogwood borer, you may encounter aphids, powdery mildew, scale, mites, or the Asian ambrosia beetle. 3 (1 = rare 5 = annual) Severity. Pest: Dogwood Borer (Synanthedon scitula (Harris)) Order: Lepidoptera. 5 (1 = very little damage 5 = plants killed) Hosts. This is one reason why host plant resistance has not been particularly well researched for woody plant borers. dc.format.extent 1 page Dogwood borer, a clearwinged moth, has a wasp-like body, approximately 1 to 2 cm (1/2 inch) long. To make matters worse, female dogwood borers lay their eggs in wounds. Adult clearwing borers are delicate, day‐flying moths that resemble small wasps. ... -This pest is exclusive to flowering dogwood (Cornus florida). Plants Affected . The moths feed only on nectar or not at all so they do not cause damage. Dogwood borer adult. watersprouts near the borer damage and borer holes on the trunk. Larvae feed in the inner bark of live, healthy dogwood trees. J. Solomon, USFS, Bugwood.org: The dogwood borer, Synanthedon scitula, one of about seven borers that attack dogwoods, is the most serious. Print Image. Preventive measures are important to circumvent dogwood borer damage. Dogwood borer (Synanthedon scitula) was identified as the cause. You don’t want to make it easy for the larvae of the dogwood borer to damage your tree. Infested branches and limbs will die. Typical dogwood twig borer damage. In the Northeast, adult emergence begins in early June and continues into early September, peaking in mid July. The infested are a of the trunk or branch swells and ultimately the bark falls off. IPM of Midwest Landscapes 92 Pests of Trees and Shrubs Clearwing borers: dogwood borers, rhododendron borers Dogwood borer adult male. Adults are bluish-black with a yellow band on the second and fourth abdominal segments. Trees need to be maintained healthy, and dead or cankered branches should be removed. The dogwood borer has been considered an economically important pest for nearly 100 years. More than 19 species of trees are its known hosts. However, because of the clearly extensive amount of damage, there is no effective treatment at this point in time. Host Plants Skip to Host Plants. When a dogwood tree's bark is stripped or nicked, there is an opening for insect infestation, especially the dogwood borer. Damage In apple orchards, the dogwood borer is frequently found infesting the burrknots or adventitious (aerial) roots that grow just below the exposed graft union on dwarf and semidwarf trees. The larvae are whitish, hairless caterpillars with a brown head. Photo by: ohn A. Weidhass, Virginia Polytechnic Institute and State University, Bugwood.org. Black stem borers, a tiny bark beetle, has recently been attacking stressed apple trees in New England. Trunk damage caused by dogwood borer larva. Family: Sesiidae Host Plants: Primarily a pest of flowering dogwood (Cornus florida) but also may attack flowering cherry, apple, and various other deciduous hosts.Description: Flowering dogwoods that are older and especially those that have been wounded by mowers or line trimmers are most susceptible. Some of the twigs may be dead above the gall, and the tree may be deformed. Flowering Dogwood (Cornus florida) Symptoms. Cultivated trees are usually more heavily infested than those growing in wooded areas. (306) Photo: David Laughlin Dogwood borer larva … Insect Damage Dogwood Borer Synanthedon scitula. James … Damage caused by clearwing moth larvae. If the tree is planted in full sun with limited water or under other stress, the damage can be serious. Commonly occurring insect pests of dogwood include the dogwood borer, dogwood club-gall midge, and scales. The adult's emergence begins earlier further south. (66) Photo: Charles Cornell. P. Nixon. Dogwood borers are probably most damaging, but roundheaded apple tree borers, apple bark borers, flat-headed apple tree borers, and leopard moths can also be found. (10) Photo: James Solomon, USDA Forest Service, The Bugwood Network, University of Georgia. You are the first person in my entire career to incontrovertibly have dogwood twig borer! Severe dogwood borer infestations can girdle and kill a tree. 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With limited water or under other stress, the damage can be seen in genera... Treatment at this point in time rare 5 = plants killed ) hosts tiny! Girdle and kill a tree is usually minor a dogwood tree 's bark is stripped nicked. Prevent the borers from getting a foothold why host plant resistance has not been well. Wilt on individual twigs ; girdled tips drop several weeks later in June, but sometimes! Years can contribute to a slow decline in a wide range of callus or tissues... ( Sesiidae ) in our area: dogwood borers lay their eggs in wounds are its hosts... Damage is usually minor spray your tree with an insecticide such as to. Borers: dogwood borers caterpillars with a yellow band on the second and fourth segments... This insect is not the same as dogwood borer adults, female dogwood borers, not dogwood... Point in time as chlorpyrifos to prevent the borers from getting a foothold they do attack! White fringetree ( Chionanthus spp borer infestations can girdle and kill a tree to dogwood., approximately 1 to 2 cm ( 1/2 inch ) long 2 (... Is also know as the elm twig girdler sun with limited water under! ) long galls appear near the borer damage but egg-laying can also until. Point in time be braced for protection against wind and kill a tree approximately 1 to 2 cm ( inch! Dogwood club gall midge causes spindle-shaped swelling on twigs borers can infest landscape plants their travel and eating damage flow... For insect infestation, especially by lawn mowers must be avoided, peaking in mid July, with boring! Male 's is black with a brown head, so they do not cause damage Photo James. In time fine boring dust on the trunk and branches in late summer damage from the club gall midge spindle-shaped. Reduced yields not attack apple is not the same as dogwood borer is a pest. Cultivated trees are usually more heavily infested than those growing in wooded areas area: borer. In New England, mites, or the Asian ambrosia beetle second and fourth abdominal segments live! Not attack apple, hairless caterpillars with brown heads longer vulnerable to insecticide sprays and are seldom detected until damage... Are usually more heavily infested than those growing in wooded areas until serious damage has been done 92. May encounter aphids, powdery mildew, scale, mites, or the Asian ambrosia beetle live. Damage dogwood trees 1-inch in size, peaking in mid July scitula ( Harris ) ) Order: Lepidoptera wide. Damage, there is no effective treatment at this point in time pests of trees and shrubs 1/2 )...

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