Yield responses to ethephon for unshaken and mechanically shaken macadamia

Trueman, S. J. (2003) Yield responses to ethephon for unshaken and mechanically shaken macadamia. Australian Journal of Experimental Agriculture, 43 9: 1143-1150. doi:10.1071/EA02048

Author Trueman, S. J.
Title Yield responses to ethephon for unshaken and mechanically shaken macadamia
Journal name Australian Journal of Experimental Agriculture   Check publisher's open access policy
ISSN 0816-1089
Publication date 2003
Sub-type Article (original research)
DOI 10.1071/EA02048
Volume 43
Issue 9
Start page 1143
End page 1150
Total pages 8
Place of publication Collingwood, Vic., Australia
Publisher CSIRO Publishing
Collection year 2003
Language eng
Subject C1
300302 Plant Growth and Development
620207 Tree nuts
060703 Plant Developmental and Reproductive Biology
Abstract Ethephon promotes fruit abscission and accelerates harvest of macadamia, Macadamia integrifolia (Proteaceae), but has limited use due to concerns that associated abscission of inner-canopy leaves may reduce subsequent yield and nut quality. Yield and quality were monitored for 2 years following ethephon application to both unshaken and mechanically shaken trees of the late-abscising cultivar, A16. Nut quality was not adversely affected in subsequent seasons, but effects on yield varied. In 3 of 6 experiments, ethephon reduced yield in the year after application. However, in 4 of the 6 experiments, 2 years of ethephon application greatly elevated yield in the third year. This was not a compensating recovery from low second-year yield, as third-year yield of trees that received only 1 ethephon treatment did not differ from yield of control trees. Ethephon-assisted harvest remains feasible for macadamia, although further work is warranted given the potential risks and considerable benefits for subsequent yield. Inner canopy defoliation, resulting from ethephon use, could represent a canopy management technique for dense-canopy fruit trees.
Keyword Agriculture, Multidisciplinary
Eucalyptus Nitens Deane
Nitrogen Application
Integrifolia Maiden
Co2 Diffusion
Q-Index Code C1
Additional Notes NOTE 1. S. J. Truemen - Department of Botany, University of Queensland. -- NOTE 2. Journal title discontinued in 2008. Continued by Crop & Pasture Science (ISSN 1836-0947)

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Created: Wed, 15 Aug 2007, 01:30:08 EST