Improved Vegetative Propagation of Scouler Willow
Demand has exceeded supply for conservation plantings of Scouler willow (Salix scouleriana Barratt ex Hook.). To test possible ways to improve propagation, we treated 8- to 10-cm-long (3.2- to 4.8-in-long) hardwood cuttings with 0.0, 0.1, 0.3, 0.8, and 1.6% indole-3-butyric acid (IBA), and 5- and 10-cm-long (2- to 4-in-long) softwood cuttings, with 0.0 and 0.3% IBA. Best rooting (73% and 87% ) occurred after treatment with 0.3% IBA in the hardwood and 10-cm long softwood cuttings, respectively. Microshoots were tested with the antibiotic cefotaxime and calcium gluconate to control bacterial contamination and shoot-tip necrosis. Microshoots, with or without naphthaleneacetic acid (NAA), rooted up to 92% both in and ex vitro without NAA. Similar micropropagation options may improve production of other difficult to propagate willows. Tree Planters' Notes 46(2):58-63; 1995.
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Author(s): John L. Edson, Annette D. Leege-Brusven, David L. Wenny
Publication: Tree Planters' Notes - Volumes 46, Number 2 (1995)
Section: Peer Reviewed and Refereed Articles
Volume: 46
Number: 2
