University of California

Chemical induction of fruit abscission in olives


H. T. Hartmann
A. J. Heslop
J. Whisler

Authors Affiliations

Hudson T. Hartmann is Professor of Pomology, University of California, Davis; A. J. Heslop is District Horticultural Officer, Victoria Department of Agriculture, Robinvale, Australia; John Whisler is Laboratory Technician, University of California, Davis.

Publication Information

Hilgardia 22(7):14-16. DOI:10.3733/ca.v022n07p14. July 1968.

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To facilitate mechanical harvesting of olives by trunk or limb shakers, and increase fruit removal, research has continued toward reducing the fruit-stem attachment force. Previous studies in California have shown that ascorbic or iodoacetic acid are effective in reducing the attachment force of olive fruit, but only when applied under conditions of very high air moisture. Attempts at artificially increasing the humidity surrounding the trees during or following spray application have been unsuccessful. The addition of surfactants or penetrante has not enabled use of ascorbic or iodoacetic acid to effectively loosen olive fruits under the low humidity conditions which prevail during the table olive harvest season in California.

Hartmann H, Heslop A, Whisler J. 1968. Chemical induction of fruit abscission in olives. Hilgardia 22(7):14-16. DOI:10.3733/ca.v022n07p14
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