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Am. J. Enol. Vitic. 55:3:265-268 (2004)
Copyright © 2004 by the American Society for Enology and Viticulture.
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Effects of High Auxin Concentrations, Cold Storage, and Cane Position on Improved Rooting of Vitis aestivalis Michx. Norton Cuttings

Kathryn Keeley 1, John E. Preece 1, Bradley H. Taylor 1, and Imed E. Dami 2

1 Department of Plant, Soil and General Agriculture, Southern Illinois University, Carbondale, IL 62901
2 Assistant Professor, Horticulture and Crop Science, Ohio Agricultural Research and Development Center, The Ohio State University, 1680 Madison Avenue, Wooster, OH 44691

Email: dami.1{at}osu.edu

More than 3,000 Norton hardwood cuttings were tested in an experiment conducted under commercial greenhouse propagation conditions. Treatment with 10,000 or 15,000 mg/L potassium salt of indolebutyric acid (KIBA) caused >70% of the cuttings to root, compared with 23% rooting of the nontreated control cuttings. In studies at a university greenhouse under intermittent mist, cuttings that were collected in January and stored in a cooler at 5°C for ge55 days (>2300 hours of natural plus cooler chilling) formed more roots than cuttings receiving fewer hours of chilling. Cuttings in this experiment that were treated with 15,000 mg/L KIBA formed significantly more roots than cuttings not treated with auxin. Hardwood cuttings and softwood cuttings taken from more basal or middle cane segments rooted better than cuttings from nearer the apical region. Softwood cuttings formed more roots when treated with 2,500 mg/L KIBA compared to the nontreated control cuttings.

Note:
Acknowledgments: We thank Chaumette Vineyards, Missouri, and Owl Creek Vineyards and Mockingbird Farms, Illinois, for their cooperation on this research. This research was funded in part by a grant from Illinois C-FAR.

Key words: auxin, cutting storage, grape, hardwood cuttings, propagation, softwood cuttings






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Copyright © 2004 by the American Society for Enology and Viticulture.