Abstract
Abstract Vacuum infusion or soaking of freshly harvested Freesia hybrida Bailey ‘Moya’ corms in solutions of ethephon, gibberellic acid (GA3), abscisic acid (ABA), benzylamino purine (BA) or indoie-acetic acid (I A A), or in solutions with combinations of these growth regulators, did not decrease the time required for shoot emergence. Ethephon delayed shoot emergence and acted synergistically when combined with GA3, or with GA3 and BA, to further delay shoot emergence. Ethephon or ethephon + B A treatments increased the number of shoots produced per corm. Days to flower and flower quality were not influenced by any of the exogenous growth regulator treatments. Presently, there appears to be little horticultural advantage in applying these growth regulators to freesia corms to hasten shoot emergence prior to planting in order to circumvent the need for 10 to 13 week storage treatment at 28°C to remove dormancy and to ensure rapid shoot emergence.
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