Interaction of Succinic Acid 2,2-Dimethyl Hydrazide, 2-Chloroethylphos-phonic Acid and Auxins on Maturity, Quality and Abscission of Apples1
Open Access
- 1 November 1970
- journal article
- Published by American Society for Horticultural Science in Journal of the American Society for Horticultural Science
- Vol. 95 (6) , 664-666
- https://doi.org/10.21273/jashs.95.6.664
Abstract
2-chloroethylphosphonic acid (Ethrel) was applied alone and in combination with NAA or 2,4,5-TP on apple cultivars which had previously been treated with succinic acid 2,2-dimethyl hydrazide (Alar). On ‘McIntosh,’ Ethrel applied 1 to 2 weeks before harvest overcame the abscission delay induced by the earlier Alar application, hastened red color development and slightly diminished the increased firmness imparted by Alar. The addition of NAA to the Ethrel treatment counteracted the abscission stimulation but did not alter the other effects of Ethrel associated with its release of C2H4. Thus, Alar-treated fruits reached maturity earlier under the influence of Ethrel, and with the addition of NAA or 2,4,5-TP a satisfactory retention force was maintained until harvest. ‘McIntosh’ receiving these combinations were of comparable or better quality in comparison with control fruits or fruits treated with Alar alone after storage in CA and in 32°F air.Keywords
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