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Ammonium thiosulphate and 6-benzyladenine improve the crop load and fruit quality of 'Delicious' apple


Bound, SA and Wilson, SJ, Ammonium thiosulphate and 6-benzyladenine improve the crop load and fruit quality of 'Delicious' apple, Australian Journal of Experimental Agriculture, 47, (5) pp. 635-644. ISSN 0816-1089 (2007) [Refereed Article]

Copyright Statement

Copyright 2007 CSIRO

DOI: doi:10.1071/EA05217


Four trials were conducted over 3 years to assess the effect of ammonium thiosulfate (ATS) as a blossom thinner of 'Delicious' apple trees. In addition to determining the optimal concentration of ATS and the effectiveness of multiple applications, the effect on fruit quality was assessed. A program using ATS at bloom and 6-benzyladenine (BA) applied postbloom was examined. Multiple applications of ATS reduced crop load more than a single application. A concentration of 1.0% (v/v, 5800 mg/L) applied twice during the flowering period is recommended, with the first application at 20% bloom and the second at 80% bloom. Fruit firmness and sugar content were increased by ATS, and a positive relationship between fruit weight and sugar content and between fruit weight and firmness was demonstrated. ATS can also be effectively combined in a program with BA with the added benefits of increases in fruit size, firmness and sugar content; however, caution is advised to prevent over-thinning. © CSIRO 2007.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Horticultural production
Research Field:Horticultural crop growth and development
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural crops
Objective Field:Pome fruit, pip fruit
UTAS Author:Bound, SA (Dr Sally Bound)
UTAS Author:Wilson, SJ (Dr Stephen Wilson)
ID Code:35418
Year Published:2007
Web of Science® Times Cited:14
Deposited By:Agricultural Science
Deposited On:2007-08-01
Last Modified:2014-04-10

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