Identification and Control of Cankers Caused by Nectria Cinnabarina of Honey Locust

Cultivars of thornless honey locust (Gleditsla triacanthos var. inermis) are popular shade trees because of their fast growth, attractive foliage, spreading shape, and diffuse shade. These cultivars are also favored by the horticultural industry because they propagate well and transplant easily. In recent years honey locusts have been planted in increasingly large numbers. Between 1976 and 1981, nearly 17,000 honey locusts were planted in public areas in Minnesota (Minnesota Dept. of Agric. 1981). As honey locusts become more important components of our urban forests, disease problems that occur on this species infrequently will undoubtedly become more prevalent.