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Improvement of tablegrape vine fruitfulness by prior season gibberellic acid application during flowering

journal contribution
posted on 12.03.2020, 00:00 authored by Kishor DahalKishor Dahal, Surya BhattaraiSurya Bhattarai, David MidmoreDavid Midmore, DR Oag, Kerry WalshKerry Walsh
Gibberellic acid (GA3) spray application during flowering is practiced for berry thinning in commercial vineyards but may influence inflorescence primordia development in latent buds, leading to variability in vine fruitfulness and yield in the following season. The effects of timing (10% capfall to >80% capfall) of GA3 application during flowering on following season yield were evaluated for the commercial cultivar ‘Menindee Seedless’ in a subtropical climate of Queensland, Australia over two seasons. Inflorescences were counted 4–5 weeks after budburst to assess vine fruitfulness in the season following GA3 application. Applied at early flowering (30% capfall) GA3 produced significantly more (122%) inflorescences per vine in the following season compared to the unsprayed control. Application at mid (50% capfall) to late (>80% capfall) flowering stages did not affect inflorescence numbers in the following season when compared to the control, except at ≥70% capfall stage in one of the two seasons. Applied at late flowering (>80% capfall) GA3 resulted in greater berry diameter than application at early flowering (10% capfall). Further evaluation of a double application strategy involving GA3 at both an early and a late stage of flowering to influence both current season berry size and next season fruitfulness is recommended

Funding

Category 2 - Other Public Sector Grants Category

History

Volume

95

Issue

1

Start Page

76

End Page

83

Number of Pages

8

eISSN

2380-4084

ISSN

1462-0316

Publisher

Taylor & Francis, UK

Language

en

Peer Reviewed

Yes

Open Access

No

Acceptance Date

05/07/2019

External Author Affiliations

Queensland Government

Author Research Institute

Institute for Future Farming Systems

Era Eligible

Yes

Journal

The Journal of Horticultural Science and Biotechnology