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Manipulating time of bud break, flowering and crop development of sweet cherry with the dormancy breaker Waiken®

conference contribution
posted on 2023-05-23, 11:54 authored by Sally BoundSally Bound, Miller, P
Trials were conducted over two seasons to determine the effect of late winter applications of the rest breaker Waiken® (an emulsified vegetable oil compound, SST Australia Pty Ltd) on flowering and spring growth of sweet cherry cultivars 'Vista' and 'Sylvia'. Trial design in all trials was a randomised complete block with 10 single tree replicates. An untreated control was included in all trials and Waiken was applied to dormant trees. In the first season, Waiken was applied at 4% by volume to drip point to 'Vista' trees on 4th August (approx. 7 weeks before budburst). Treatment advanced and concentrated the flowering and harvest maturity and also reduced apical dominance and increased leaf canopy development in spring. The following season trials were established on 'Vista' and 'Sylvia'. In the 'Vista' trial, 4% Waiken was applied as a single application at four different times NDASH the earliest on 2 August (54 days before budburst (dBBB)) and the latest application on 27 August (30 dBBB). In the 'OSylvia' trial, 4% Waiken was applied at either 73 dBBB (2 August) or 60 dBBB (15 August). In both cultivars, earlier applications of Waiken advanced bud break, flowering and fruit maturity by approximately 7 days. Later application of Waiken at 30 d BBB delayed bud development and flower opening, reduced the length of the flowering period and concentrated fruit maturity. Waiken increased early canopy development at all timings but to a greater degree with earlier applications (up to 300%). This work has demonstrated that Waiken is effective in manipulating budbreak and flowering in sweet cherry and has potential to delay bud and flower development to help avoid frost in frosty areas. However further work is needed to determine how late it can be applied to delay bud break in cherries.

History

Publication title

Acta Horticulturae

Volume

1130

Editors

DS Tustin, BM van Hooijdonk

Pagination

285-291

ISSN

0567-7572

Department/School

Tasmanian Institute of Agriculture (TIA)

Publisher

International Society for Horticultural Science

Place of publication

Belgium

Event title

XXIX International Horticultural Congress on Horticulture: International Symposia on the Physiology of Perennial Fruit Crops and Production Systems and Mechanisation, Precision Horticulture and Robotics

Event Venue

Brisbane, Australia

Date of Event (Start Date)

2014-08-17

Date of Event (End Date)

2014-08-22

Rights statement

Copyright 2016 ISHS

Repository Status

  • Restricted

Socio-economic Objectives

Stone fruit (excl. avocado)

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    University Of Tasmania

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