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Effects of hydrogen cyanamide in manipulating budburst and advancing fruit maturity of table grapes in south-eastern Queensland

journal contribution
posted on 2023-05-18, 23:16 authored by George, AP, Nissen, RJ, Baker, JA
Four times of winter pruning and hydrogen cyanamide application were evaluated for their effects on budburst, growth, flowering and yield of the table grape cultivar Muscat Hamburg in south- eastern Queensland (lat. 26°S.). Hydrogen cyanamide hastened budburst at all times of application. When cyanamide was applied 8-10 weeks before natural bud-burst, fruit maturity was advanced by 14-18 days, However, application within 4-6 weeks of natural bud-burst had little or no effect on time of fruit maturity. Low temperatures during flowering, which can adversely affect pollination, seed development and hence yield, may limit the use of early pruning and cyanamide application, particularly under cooler subtropical conditions. Depending on market prices, any loss of yield associated with early pruning and cyanamide applications will need to be compensated for by higher prices received for earlier maturing fruit. Cyanamide may have greater commercial potential for use on young, vigorous vines growing under warm subtropical conditions. Under these conditions, cyanamide application at 4-6 weeks before natural budburst gave significant yield increases by increasing the number of bunches produced per spur. No deleterious effects of cyanamide on fruit quality were recorded.

History

Publication title

Australian Journal of Experimental Agriculture

Volume

28

Issue

4

Pagination

533-538

ISSN

0816-1089

Department/School

Tasmanian Institute of Agriculture (TIA)

Publisher

CSIRO Publishing

Place of publication

150 Oxford St, Po Box 1139, Collingwood, Australia, Victoria, 3066

Rights statement

Copyright 1988 CSIRO

Repository Status

  • Restricted

Socio-economic Objectives

Horticultural crops not elsewhere classified

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    University Of Tasmania

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