Abstract
Abstract Two-year-old apple trees growing in the nursery row were effectively defoliated by sprays of Ethrel at concentrations of 2000, 3750, and 5000 ppm. Retarded shoot growth and polarity reversal indicated that a 5000 ppm concentration was supraoptimal. The 2000 ppm concentration somewhat delayed early spring growth, but not unacceptably so. Using this or a slightly lower level appears quite promising as a commercial practice. Development of visible root germs was greater on Ethrel treated plants.
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More From: Journal of the American Society for Horticultural Science
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