Forcing Epicormic Sprouts on Branch Segments of Adult Hardwoods for Softwood Cuttings
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The International Plant Propagator's Society 52:417-424
Branch segments cut from basal limbs of transitional or adult hardwood trees were forced in the greenhouse to initiate shoot growth from latent buds for the production of softwood cuttings. Forcing in February, March, and April produced 10 to 15 visible buds or elongating shoots per meter of branch wood, which was more than twice the number during any other month. On average from January through August, two to four shoots per meter of branch wood exceeded 4 cm in length and could be harvested as softwood or greenwood cuttings. During this period, the red and white oaks, white ash, and honeylocust yielded more sprouts than did black walnut, several walnut hybrids, hickory, pecan, and chestnut. Sugar maple was the least productive of the twelve hardwood species evaluated. Number of sprouts declined with increasing age of the trees. Manually watering trays daily or maintaining trays under intermittent mist throughout the day yielded more sprouts than continuous mist for 30 min each day or use of humidity domes. All four moisture regimes resulted in the production of more shoots than treatments with continuous bottom flooding.
Van Sambeek, J. W.; Preece, John E.; Coggeshall, Mark V. 2003. Forcing Epicormic Sprouts on Branch Segments of Adult Hardwoods for Softwood Cuttings. The International Plant Propagator''s Society 52:417-424