My American Ash tree is treated for EAB with TreeAzin. One small- to medium-sized tree I like is the purple robe locust (Robinia pseudoacacia). Locust borer larvae weaken trees, rendering them susceptible to wind breakage and retarding growth. Growth Rate: 24 to 36 Inches per Year. Excellent, Hard-Wooded Street Tree. Most serious pest is Locust borer, however, cultivars have been developed that are resistant to this borer. Still its faults are considered minor enough that several communities use it as a street tree. overwinter as larvae in the bark; tunnel into … The locust borers mate on the locust tree trunk. This is a high maintenance tree that will require regular care and upkeep, and is best pruned in late winter once the … Not for general use in urban areas due to borer problems unless located in a moist, well-drained site with plenty of soil space. Height: 30 - 40 feet. It was 10ft high with three little sticks off the main branch it is now at least twenty feet high and 15 ft wide. Once established, this tree is super hardy and drought tolerant with a … Contact. Purple Robe Locust is a tough, fast growing shade tree with highly fragrant and very attractive chains of deep pink flowers in spring. Borers can be problematic following stress. Erect or Spreading with a High Canopy. Purple Robe Locust botanical name is Robinia pseudoacacia, an improvement of the native Black Locust tree. The tree looked about 20 feet tall. The Black Locust Tree does well or is tolerant in Well-Drained Clay, Loamy, Sandy, Acidic soil. This tree can grow 30 to 40 feet high by 20 to 30 feet wide. Rounded Shape. The Black Locust Tree grows well in USDA Hardiness Zones 4-9. Purple Robe Locust tree leaves. Services. Has Deciduous foliage. We have really enjoyed the flowers and it’s rapid growth shading our back deck, but the huge roots that spread ouT from it allow it to grow a new tree in every direction and the flowers are so high now that it isn’t as gorgeous from the deck. Robinia pseudoacacia 'Purple Robe' Tree Characteristics. Then the females lay 100-200 eggs in late August to early October, under bark scales, in tree wounds, or in cracks in the bark. In early spring the tree is in bloom with 4" to 8" long, Yes, photos would help :) Or you're welcome to contact a certified arborist whom can consult about your tree and give options of treatment (or removal, depending on the damage): Larvae tunnel into a tree’s trunk and branches, weakening the tree and making it susceptible to wind breakage. Aug 30, 2020 - How do I treat purple robe tree borers and what product do I use to treat the tree? When we bought our home in 2003 it had a pretty black locust tree in the back yard. The trunk of the Robinia Purple Robe Locust Tree is long and straight with an interesting branching pattern. The ‘Purple Robe’ locust tree’s leaves are metallic red when immature, and they gradually turn a deep green or bluish-green color. Locust trees dying Question: I have four Purple Robe locust trees in my yard. Easy to Grow. Can/should the purple robe locust be … Hardy to zone 3, this locust prefers full sun, is tolerant of most soils and fixes nitrogen. It is advertised as thornless, but plants with thorns are found in commerce. Longevity 50 to 150 years. She was right.This is the second year and it has tripled in size. I described the tree to a knowledgeable friend who told me it was the Purple Robe cultivar of Robinia pseudoacacia, common name Purple Robe Black Locust. Tree Tolerances. The branches of Purple Robe Locust (Robinia pseudoacacia ‘Purple Robe’) are brittle and tend to break in high winds. Once full grown they can reach a height of 30-50 feet and 20-35 feet in spread. Purple Robe Locust is a deciduous tree with a more or less rounded form. Login. ... Frisia, Lace Lady, Purple Robe, Umbraculifera. It is noted for its attractive compound leaves and pendant racemes of violet purple pea-like flowers. Root Management Research. Severe infestations of locust borer result in many dead and broken limbs, along with swollen areas on the tree … The most obvious sign of attack is a knotty swelling on the trunks, many broken limbs, and irregular holes. A cultivar of the native Black Locust tree. I also have a purple robe locust that is susceptible to locust borers. Hi tree people, I cut down my Purple Robe locust tree because it was sending root suckers into my neighbor's lawn, across my garden, and into my vegetable beds, as well as dropping yellow leaves into my pond all summer and rarely flowering. Foliage is blue-green in summer, turning yellow-green in autumn. This seems to have sent the roots into a shoot frenzy. Re purple robe locust I live in cambridge ont and two years ago planted a purple robe locust, My gran from Scotland used to tell me about how beautiful they were. A variety of the black locust called purple robe. Hardy to zone 3, this locust prefers full sun, is tolerant of most soils and fixes nitrogen. It is four years old and has been fine until this year. The other one is also four years old, and it has sparse leaves on only one side of the tree. The leaves were divided into delicate leaflets. Locust borer larvae are white and legless, reaching a maximum length of about 1 inch. The relationship turned sour soon though. Urban Soil Toolkit. should not be confused with the honeylocust (Gleditsia triacanthos) a tree that does not serve as a host for this insect. Now that I had a name, it was time to do some research. Main problem in the united states is the locust borer that can wreck the wood and kills trees. Its relatively fine texture sets it apart from other landscape plants with less refined foliage. Purple Robe Locust(Robinia pseudoacacia 'Purple Robe') is a medium-sized upright tree, growing 40 feet in height with a compact, rounded form. The Purple Robe Locust likes full sun or dappled shade and will take most any soil, drought or lawn watering. Purple Robe Black Locust - Robinia pseudoacacia 'Purple Robe' This stunning variety of black locust trees is also highly ornamental with interesting aesthetics. A tough tree which should be saved for the toughest sites. Two of them are doing just fine. The black locust is the only host for this insect. Other insect problems include caterpillars, ... 'Purple Robe' 'Tortuosa' The Purple Robe Locust tree is a medium-sized upright tree, growing 40 feet in height with a compact, rounded form. Robinia pseudoacacia "Purple Robe" is commonly known as the purple-robe locust due to its fragrant wisteria-like purple blossoms that appear in … ‘Purple Robe’ is a medium sized, suckering, deciduous tree that typically grows to 30-40’ tall with an oval-upright habit. Even after more than 4 decades of dutch elm disease, american and slippery elms are still the most common trees on my place and the same will be with the native ashes since they seed all over and so good at reproducing. It’s medium to fast growth rate means that with appropriate care you could have a nice size tree in five years or so. Locust Tree With Purple Blooms. Mid-Sized Ornamental Flowering Tree. The most common cultivar of black locust is the ‘Purple Robe’ locust, noted for its attractive purplish flowers (and Leaves are alternate, pinnately compound, 6" to 14" long, 6 to 9 leaflets, elliptic or ovate, 1" to 2" long. Width: 20 - 30 feet. It sounds like you've cut down a black locust tree and now you need the roots killed because it keeps sending up sprouts all over the place. Unfortunately, with Purple Robe, borers are usually detrimental and can kill the tree. Black Locust is a deciduous tree that may grow 50 to 70 feet tall. It does not infest any other species of Robina. Robinia pseudoacacia, commonly known in its native territory as black locust, is a medium-sized hardwood deciduous tree, belonging to the tribe Robinieae.It is endemic to a few small areas of the United States, but it has been widely planted and naturalized elsewhere in temperate North America, Europe, Southern Africa and Asia and is considered an invasive species in some areas. Purple Robe Locust(Robinia pseudoacacia 'Purple Robe') is a medi Upright rounded growth and short, irregular branches form a tight canopy that cast light shade. It kept sending … Continue reading "Please send me some locust borers…" The purple robe locust tree is a spectacular pink flowering tree with very fragrant clusters of dangling flowers that are long lasting. black locust and its cultivars (e.g., purple robe locust) feed on the xylem of host trees; extensive tunneling in the wood may cause structural weakness of branches or trunk; Biology, Life Cycle & Damaging Life Stage. The tree is susceptible to several pests and diseases, including borers and leaf miners. The trunk is long and straight with an interesting branching pattern. You have locust borers and based on their biology, there are three I'll give you a couple of suggestions but if that's not your problem, ask again. Besides shade, it gave us a show of lovely purple flowers every spring. But what was the name of this mysterious stranger? ... Insects, Diseases, or Other Plant Problems: It is susceptible to locust borer (often fatal) and locust leaf miner (browns foliage). While it's a beautiful tree, it's not a species we generally recommend because of its susceptibility to borers. Truly a unique specimen shade tree which has been growing in popularity recently, the Purple Robe Locust is extremely adaptable to all soil conditions. I have had a purple robe locust for 9 years…robinia pseudoacacia. Accordingly, you should continue structural pruning when the tree is young to ensure that the tree has strong structure which may reduce the likelihood of branches breaking off. footer nav. The larvae tunnel into the inner bark and create a hibernation cell where it overwinters. Please send me some locust borers!!! When leaves are young, they are tinged with touches of purple, and as the foliage matures, it develops to a deep bronze color. As of the date of this question, one has not produced any leaves this year. The Purple Robe Locust (Robina pseudoacacia ‘Purple Robe’) has a reputation as a “trash” tree because it is prone to suckers, has tiny spurs on its branches and is highly susceptible to locust borer infestations, which can kill a tree. Tree Species Selector. It typically thrives in Full Sun and has a 4-6 feet growth rate per year. (Answer) You seem to be taking good care of your tree. The adult locust borer is a slender, “longhorned” beetle, about 3/4 inch long, with reddish legs and black antennae. Robinia pseudoacacia ‘Purple Robe’: ‘Purple Robe’ Black Locust 3 or alkaline except that which is permanently wet. Bristly Locust Tree (Robinia hispida) The bristly locust tree is a large flowering shrub with compound leaves, pink pea-like scented flowers, and reddish-brown seed pods. These eggs hatch in about a week.
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