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. As of the date of this question, one has not produced any leaves this year. Two of them are doing just fine. It is noted for its attractive compound leaves and pendant racemes of violet purple pea-like flowers. Purple Robe Locust botanical name is Robinia pseudoacacia, an improvement of the native Black Locust tree. Mid-Sized Ornamental Flowering Tree. Still its faults are considered minor enough that several communities use it as a street tree. You have locust borers and based on their biology, there are three The branches of Purple Robe Locust (Robinia pseudoacacia ‘Purple Robe’) are brittle and tend to break in high winds. Hardy to zone 3, this locust prefers full sun, is tolerant of most soils and fixes nitrogen. Tree Species Selector. The most common cultivar of black locust is the ‘Purple Robe’ locust, noted for its attractive purplish flowers (and My American Ash tree is treated for EAB with TreeAzin. Locust borer larvae weaken trees, rendering them susceptible to wind breakage and retarding growth. Not for general use in urban areas due to borer problems unless located in a moist, well-drained site with plenty of soil space. Purple Robe Locust(Robinia pseudoacacia 'Purple Robe') is a medi Once full grown they can reach a height of 30-50 feet and 20-35 feet in spread. 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. The other one is also four years old, and it has sparse leaves on only one side of the tree. The locust borers mate on the locust tree trunk. Unfortunately, with Purple Robe, borers are usually detrimental and can kill the tree. Contact. I have had a purple robe locust for 9 years…robinia pseudoacacia. I also have a purple robe locust that is susceptible to locust borers. 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. The Black Locust Tree grows well in USDA Hardiness Zones 4-9. Borers can be problematic following stress. Please send me some locust borers!!! 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. Longevity 50 to 150 years. Purple Robe Locust is a tough, fast growing shade tree with highly fragrant and very attractive chains of deep pink flowers in spring. The Purple Robe Locust likes full sun or dappled shade and will take most any soil, drought or lawn watering. One small- to medium-sized tree I like is the purple robe locust (Robinia pseudoacacia). Robinia pseudoacacia ‘Purple Robe’: ‘Purple Robe’ Black Locust 3 or alkaline except that which is permanently wet. These eggs hatch in about a week. Purple Robe Black Locust - Robinia pseudoacacia 'Purple Robe' This stunning variety of black locust trees is also highly ornamental with interesting aesthetics. The purple robe locust tree is a spectacular pink flowering tree with very fragrant clusters of dangling flowers that are long lasting. It does not infest any other species of Robina. It’s medium to fast growth rate means that with appropriate care you could have a nice size tree in five years or so. (Answer) You seem to be taking good care of your tree. Robinia pseudoacacia 'Purple Robe' Tree Characteristics. The black locust is the only host for this insect. Black Locust is a deciduous tree that may grow 50 to 70 feet tall. Height: 30 - 40 feet. Hardy to zone 3, this locust prefers full sun, is tolerant of most soils and fixes nitrogen. Tree Tolerances. ‘Purple Robe’ is a medium sized, suckering, deciduous tree that typically grows to 30-40’ tall with an oval-upright habit. Its relatively fine texture sets it apart from other landscape plants with less refined foliage. The trunk of the Robinia Purple Robe Locust Tree is long and straight with an interesting branching pattern. Purple Robe Locust is a deciduous tree with a more or less rounded form. Has Deciduous foliage. 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. Main problem in the united states is the locust borer that can wreck the wood and kills trees. A variety of the black locust called purple robe. She was right.This is the second year and it has tripled in size. 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. It typically thrives in Full Sun and has a 4-6 feet growth rate per year. Besides shade, it gave us a show of lovely purple flowers every spring. But what was the name of this mysterious stranger? Truly a unique specimen shade tree which has been growing in popularity recently, the Purple Robe Locust is extremely adaptable to all soil conditions. 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. When we bought our home in 2003 it had a pretty black locust tree in the back yard. Erect or Spreading with a High Canopy. Purple Robe Locust tree leaves. This seems to have sent the roots into a shoot frenzy. footer nav. When leaves are young, they are tinged with touches of purple, and as the foliage matures, it develops to a deep bronze color. Locust Tree With Purple Blooms. Robinia pseudoacacia "Purple Robe" is commonly known as the purple-robe locust due to its fragrant wisteria-like purple blossoms that appear in … Severe infestations of locust borer result in many dead and broken limbs, along with swollen areas on the tree … Root Management Research. The most obvious sign of attack is a knotty swelling on the trunks, many broken limbs, and irregular holes. 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 trunk is long and straight with an interesting branching pattern. The relationship turned sour soon though. It is four years old and has been fine until this year. Locust borer larvae are white and legless, reaching a maximum length of about 1 inch. Rounded Shape. A cultivar of the native Black Locust tree. 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. It kept sending … Continue reading "Please send me some locust borers…" The Purple Robe Locust tree is a medium-sized upright tree, growing 40 feet in height with a compact, rounded form. ... Frisia, Lace Lady, Purple Robe, Umbraculifera. The ‘Purple Robe’ locust tree’s leaves are metallic red when immature, and they gradually turn a deep green or bluish-green color. 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. The tree looked about 20 feet tall. The leaves were divided into delicate leaflets. It was 10ft high with three little sticks off the main branch it is now at least twenty feet high and 15 ft wide. Other insect problems include caterpillars, ... 'Purple Robe' 'Tortuosa' The tree is susceptible to several pests and diseases, including borers and leaf miners. Aug 30, 2020 - How do I treat purple robe tree borers and what product do I use to treat the tree? In early spring the tree is in bloom with 4" to 8" long, This is a high maintenance tree that will require regular care and upkeep, and is best pruned in late winter once the … Services. ... Insects, Diseases, or Other Plant Problems: It is susceptible to locust borer (often fatal) and locust leaf miner (browns foliage). Foliage is blue-green in summer, turning yellow-green in autumn. should not be confused with the honeylocust (Gleditsia triacanthos) a tree that does not serve as a host for this insect. Leaves are alternate, pinnately compound, 6" to 14" long, 6 to 9 leaflets, elliptic or ovate, 1" to 2" long. Can/should the purple robe locust be … 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. Easy to Grow. Upright rounded growth and short, irregular branches form a tight canopy that cast light shade. The adult locust borer is a slender, “longhorned” beetle, about 3/4 inch long, with reddish legs and black antennae. Excellent, Hard-Wooded Street Tree. Login. 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): www.treesaregood.com I'll give you a couple of suggestions but if that's not your problem, ask again. Most serious pest is Locust borer, however, cultivars have been developed that are resistant to this borer. A tough tree which should be saved for the toughest sites. Growth Rate: 24 to 36 Inches per Year. Now that I had a name, it was time to do some research. Width: 20 - 30 feet. 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. Larvae tunnel into a tree’s trunk and branches, weakening the tree and making it susceptible to wind breakage. 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.
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