Once you recognize the signs of a birch borer infestation treat the river birch accordingly and prevent birch borers from returning. It is popular for its ornamental peeling bark. Tecumseh Compact® river birch  (Betula nigra ‘Studetec’):  A 10 to 12 foot tree with a rounded compact form and semi-arching branches, cinnamon-colored exfoliating bark. Where you’ll find them: You can find bronze birch borer throughout the U.S. wherever white barked birches are grown, from Maine to Washington state and Georgia to California. Heritage® river birch (Betula nigra ‘Cully’): Larger, glossy, dark green leaves, nearly white interior peeling bark, more heat tolerant. It has also been reported on beech. Resistant to bronze birch borer You can search, browse, and learn more about the plants in our living collections by visiting our BRAHMS website. European White Birch, Betula pendula, was widely planted several decades ago but it was found to be susceptible to Bronze Birch borer. Get expert help from The Morton Arboretum Plant Clinic. It can have problems with leaf spot, birch leaf miner and aphids, but it is the only birch that is immune to the bronze birch borer. Bronze birch borers are a type of grub that can kill roots, branches, and entire trees. This plant has some cultivated varieties. River birch is a fast-growing, deciduous semi-aquatic tree that reaches between 50 and 90 feet in height. River birch is a deciduous medium to large-sized native tree. Wood eating beetles do exactly as their name describes, they eat away at the river birch (Betula nigra) leaving behind a damaged and unhealthy tree. Flanigan has written for various publications, including WV Living and American Craft Council, and has published several eBooks on craft and garden-related subjects. Resistant to bronze birch borer, it has nice yellow fall color, and attractive cinnamon-brown exfoliating bark for an interesting winter effect. It is a dense, compact tree with glossy green leaves and exfoliating bark. These tunnels are usually visible as raised bumps on the exterior of the bark and may leave sappy areas on the trunk, which may crack when they solidify. Shiloh Splash river birch (Betula nigra 'Shiloh Splash'): A compact form growing 10 feet high and 8 feet wide. SOURCE:learn2grow.com Plants benefit with a 3 to 4 inch layer of mulch and supplemental water in dry periods. Remove damaged branches and twigs with pruning shears and dispose of them in a tightly-closed plastic bag. Symptoms of Birch Borer infestation include midsummer yellowing of foliage on some branches in the canopy, progressing to brown/dead leaves. Whitespire is a Japanese white-barked birch that is only attacked when under severe stress; bronze birch borer infestation is limited under good growing conditions. Have a professional apply pesticide. River birches are Missouri natives that are naturally adapted to the climate and are extremely resistant to birch borer. River birch is a good choice for the North or Central Florida gardener who wants a fast-growing tree. Stop by, email, or call. Go to list of cultivars. You can also plant resistant cultivars of the river birch -- such as “Heritage Birch” -- to decrease the possibility of a bronze birch borer attack. It normally grows with a central leader and small-diameter, dark-colored lateral branches. Flanigan completed two writing courses at Pierpont Community and Technical College. Introduced through the Chiacagoland Grows® program. As its name suggests, the river birch naturally grows along riverbanks. However, permethrin pesticides can help control adult birch borers if applied properly. The bronze birch borer is a serious native insect pest. River birch can be easily trained with one central leader or as a m… Plants benefit with a 3 to 4 inch layer of mulch and supplemental water in dry periods.Birches are considered  “bleeders”, avoid pruning in late spring before leaves emerge. During the winter months, the top of the tree could die. It’s … This species is more tolerant of heat than other birches and is resistant to birch borers. River birch (Betula nigra) belongs in the category, "Beautiful Trees for Someone Else's Yard." Insecticides are not meant to take the place of proper care, but can be used to reduce attacks. Simple, alternate, 2 to 3 inches long, triangular or wedge-shaped with doubly serrated tooth margins. Systemic insecticides, such as Imidacloprid, diluted with water as recommended on the pesticide label and carefully poured at the base of the infested tree, can control the pests if the tree is healthy. Description. River Birch has dark green foliage throughout the season. If you can form the soil into a ball with your hand, the soil has enough moisture. The pointy leaves turn an outstanding yellow in the fall. A healthy, well-cared-for river birch is less likely to come under attack from insect pests. The larvae, which does the damage, are unseen, feeding on the vascular tissue under the bark. The light colored larvae of the bronze birch borer, when full-sized, have unusual enlarged, flattened segments directly behind their heads. If rainfall is not in abundance, water the tree at the rate of 2 to 3 inches a week during the growing period. Of the number of pests which are attracted the birch trees, the bronze birch borer (Agrilus anxius) is the most important as it is both lethal and difficult to control. The flowers are unisexual, borne in separate male and female catkins on the same tree. Activity will be approximately 7 days earlier for southern Minnesota and 7 … The species is valued for its relatively rapid growth, tolerance of wetness and some drought, unique curling bark, spreading limbs, and relative resistance to birch borer. The bark is light brown to buff, paperlike; exfoliating on young trees, turning to scaly bark on older trees. The following menu has 3 levels. Browse the curated collection and add your voice! Family: Buprestidae Host Plants: The most common hosts are paper birch (Betula papyrifera), European white birch (B. pendula) and gray birch (B. populifolia).The birches that display various levels of resistance to this pest are: monarch birch (B. maximowicziana), Asian white birch (B. platyphylla var. The Morton Arboretum is a 501(c)(3) nonprofit that relies on the generosity of members and donors. Insecticides are not an effective control for the larvae of the bronze birch borer and proper cultural practices are typically recommended as the best method of control. © Copyright 2020 Hearst Communications, Inc. Its bark is extremely showy and peels off in attractive sheets of beige or creamy white, and the leaves are triangular. Tolerant of wet soils, it’s the first weeping birch with resistance to the Bronze birch borer. The adult is a black beetle about 1/2 inch long and has bronzy iridescence on the back. Generally, the bronze birch borer is the culprit feasting on the wood of the river birch. The adult birch borer beetle has an elongated, flattened body in metallic hues of green, copper, black and blue. Good drought tolerance. Dura-Heat® river birch (Betula nigra ‘BNMTF’):  Smaller, glossy, olive green leaves, whitish, exfoliating bark, more resistant to aphids; better resistance to heat. Use up and down arrow keys to explore within a submenu. Trunk treatment pesticides designed to control wood eating beetles are available to licensed professionals. The gray birch and the European white birch are most vulnerable to the bronze birch borer; the canoe and river birches seem better able to resist. The adults lay their eggs in wounds and cracks present in the birch’s bark the eggs hatch into larvae. For instance, the River Birch and Birches with a Brown Bark are more resistant to the Borer. Wood eating beetles do exactly as their name describes, they eat away at the Our future. Heritage river birch has light colored bark that may be acceptible as a substitute. Betula nigra, River Birch has reddish-brown exfoliating bark Thoroughly coat the foliage and bark with a permethrin pesticide in mid April when the adult birch borers are active, and repeat the treatment about four weeks later. In winter, it shows off its warm creamy-brown exfoliating bark. Summer Cascade river birch   (Betula nigra 'Summer Cascade'):  A weeping form; 6 feet high and 10 feet wide; taller if staked. Within a submenu, use escape to move to top level menu parent. This insect targets old and stressed birch … Simple, alternate, 2 to 3 inches long, triangular or wedge-shaped with doubly serrated tooth margins. River birch is not attacked by bronze birch borer. As a landscape plant, it is grown as a single-stem tree or in a clump as a multi-stemmed tree with three or more trunks. They're popular here in the South because they're native, grow fast, develop handsome flaking bark, and don't fall victim to all the borers, bugs, and diseases other birches do. All birch species can become infested. C-Value: 7 City Slicker® river birch (Betula nigra 'Whit XXV'): Dark green foliage that turns bight yellow in fall. The bronze birch borer larvae chew tunnels beneath the bark, feeding on the living tissue. Because birch are shallow-rooted, they prefer a location where the soil remains cool and moist while exposing the canopy to ample sunlight (about 6 hours daily). The Bronze Birch Borer is a wood boring beetle, common across the northern half of the United States, which attacks all birch species. The foliage is variegated and has cream or ivory edges. This species is resistant to bronze birch borer (BBB). But as a landscape tree, it can be planted almost anywhere in the U.S. Have tree and plant questions? Although river birches have some susceptibility to aphids, leaf miner and iron chlorosis in high pH soils, these problems are somewhat minor in comparison to the birch borer. This species is native to the Chicago region according to Swink and Wilhelm's Plants of the Chicago Region, with updates made according to current research. Dedicated to … River birches are Missouri natives that are naturally adapted to the climate and are extremely resistant to birch borer. 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