Abstract
Butternut (
Juglans cinerea L.), highly valued for its timber and nuts, occurs as widely scattered trees or isolated stands throughout the Central Hardwood region (Rink 1990). The introduced fungus
Sirococcus clavigignenti-juglandacearum has rapidly cankered, girdled, and killed most of the butternut trees; however, a few trees that may be resistant to the fungus have been found (Furnier and others 1999). A program to graft scionwood from putatively canker-resistant trees and establish germ-plasm repositories within the natural range of butternut has been initiated as one of several conservation measures (Ostry and others 1994, 2002). Although butternut easily grafts to seedling rootstocks of black walnut (
J. nigra L.) and heartnut (
J. ailanthifolia Carr.), the overwintering of containerized grafts has been problematic.
Parent Publication
Citation
Van Sambeek, J. W.; Ostry, Michael E.; Zaczek, James J. 2003. Survival and growth of deep-planted, in-leaf grafts in a germplasm repository of canker-resistant butternut. In: Van Sambeek, J. W.; Dawson, Jeffery O.; Ponder Jr., Felix; Loewenstein, Edward F.; Fralish, James S., eds. Proceedings of the 13th Central Hardwood Forest Conference; Gen. Tech. Rep. NC-234. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station: 476-479
