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Plant sciences, sustainable farming systems and food quality

Promoting flowering in sweet orange

GI Moss

Australian Journal of Agricultural Research 22(4) 625 - 629
Published: 1971


Two substances reported to stimulate flowering in citrus, Alar (N-dimethylamino-succinamic acid) at 3000 p.p.m. and Hyvar-X (5-bromo-6-n1ethyl-3-s-butyluracil) at 783 p.p.m., when applied twice to sweet orange plants under marginally flower-inducing conditions (24/19¦C day/night temperature) resulted in fewer flowers being formed than in the controls. These substances had no significant effect on the numbers of flowers formed by either fruit-bearing or non-fruiting plants under flower-inducing conditions (18/13¦C day/night temperature). In the field, Alar (3000 p.p.m.) applied twice or girdling of branches, about the time of flower formation, did not promote flowering on either fruit-bearing or non-fruiting branches.

© CSIRO 1971

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