ISHS Acta Horticulturae 80: Symposium on Growth Regulators in Fruit Production
THINNING PEACHES WITH ETHYLENE-RELEASING CHEMICALS |
| Authors: | G.E. Stembridge, C.E. Gambrell, . |
| Abstract:
Ethephon (2-chloroethylphosphonic acid) was applied to several peach cultivars at various stages of fruit development. Fruits were thinned most effectively at the time of transition from Stage I to Stage II, coincident with physiological drop. Leaf abscission was greatest in treatments which produced the most fruit abscission. A new ethylene-releasing chemical, CGA 15281, produced a timing-response pattern similar to ethephon, although higher concentrations were required for fruit thinning. CGA 15281 caused less leaf abscission than ethephon. Seed development was studied in fruit induced to abscise with CGA 15281. Substantial growth of both endosperms and embryos occurred during the period when fruit abscission was initiated, indicating that abscission was not caused by seed malfunction. | |
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