Jan, your photo was the deciding point for me. Our back garden has southern exposure. Both are fast-growing and bloom once a year. Sometimes individual worms can be seen hanging from a branch on a thread of silk. This popularity has led to overplanting. Skyline Honey Locust Tree (Question) We live in south Etobicoke. We have 3 regions; Peaks and Plains, Front Range and Western. Skyline Honey Locust (Gleditsia triacanthos var. Problems of Honey Locust Tents of webbing on the tree - The leaves look browned, scorched. Allow the soil at the tree base to dry out between irrigation events to prevent bark death at the soil line. High humidity and wind-driven rain favor spore release and infection. When they hatch, they web leaves together to form a protective tent, under which they feed on the rest of the leaves. Borers and webworms are common insect problems in some areas. Because canker fungi can grow on dead wood and produce spores that can infect nearby trees, keep the wood dry, bury it in a landfill or burn it within three weeks of cutting. Black spot Nectria or Thyronectria cankers at the tree’s base usually indicate collar rot is active or was active in the past. It also produces sexual fruiting bodies (perithecia) that are reddish-brown and also darken. Prune dead or infected branches to reduce the chance of other infections. Loose bark and discolored wood (yellow to brown instead of white) just below the bark indicate initial collar rot and are the most indicative symptoms. Like; Save; becky_ia. CSU A-Z Search Lawnmowers, weed trimmers and construction work commonly cause basal injuries. Of course no tree is perfect, but this variety is a widely used shade tree that can be found easily in our area, and we occasionally use them when one of our landscape designers determine it is a good choice for the site and meets the property owner’s needs. Trees, insects and diseases of Canada's forests; Trees ; Broadleaf; Group 9; Gleditsia triacanthos; Honey-locust. Diagnosis of the disease is easier if fruiting bodies (the spore-producing structures) of the fungi are present. Root collar rot is common in urban areas in Colorado and nearby states and is responsible for the death of many of the honeylocusts killed by disease. His knowledge was based on trimming many a tree over the last 10 years. The appealing features of the cultivars make this tree one of the first chosen for planting. Symptoms of root collar rot need to be recognized promptly because the disease can rapidly kill trees. There is some suspicion that cankers may also be caused by pruning wounds or sunburn. Since the fungi also can live in dead tissue, they can become established or produce spores on dead wood such as branch stubs, wound edges or firewood. To control canker diseases, prevent wounds and stress and promote of tree vigor. A central leader usually develops with little encouragement and the tree will require little pruning. Shademaster Honey Locust - Gleditsia triacanthos var. Their egg masses are covered with velvety, buff-colored hairs, and contain 400 to 500 eggs. Midge larvae live within these galls at the ends of new growth on Honeylocust trees. I bought two Skyline honey locusts, one in 2008 and one in 2011. The sexual fruiting bodies that look like small round flasks (perithecia) form in late summer singly or in groups up to 15 and are bright red to reddish-brown. 2. Cankers and root collar rot are the major diseases of honeylocusts because they can girdle the stem and kill the tree. Disease symptoms include dieback of affected branches, reduced foliage, yellow foliage, premature fall coloration and early leaf drop. This variety is thorn-less and seedless. Honeylocust leaf out later than most other shade trees, thus protecting them from devastating late spring freezes and heavy snow. The condition of the bark and cambium (the tree’s growth tissue, between bark and wood) can indicate the presence of a canker. Thornless honey-locust The light, dappled shade cast by the lacy foliage of this attractive tree is only one of its virtues. Cut out small cankers on main stems. To help prevent infection, avoid stress due to improper planting practices, drought, overwatering and insufficient area and oxygen for root growth. Look for fruiting bodies in areas of the bark that have been dead for a year or less. In southern regions webworms may produce several broods in one year . Employment | Plant Family: Fabaceae. Honeylocust is native to the east central United States, where it grows in rich, moist soils along streams. Equal Opportunity | CSU Extension - A division of the Office of Engagement. Usage : Parking lot island, buffer strip, sidewalk, street, specimen, reclamation. 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