ISHS Acta Horticulturae 694: International Symposium on Harnessing the Potential of Horticulture in the Asian-Pacific Region
RALEX® USE FOR FLOWER MANIPULATION IN ‘NAVEL’ ORANGES |
| Author: | T. Khurshid |
| Keywords: | Navelina, flower inhibition, inflorescence type, fruit size |
| Abstract:
Citrus growers need to be able to optimise fruit size to meet export specifications. Ralex® a commercial GA3 formulation, can be used to suppress flowering in expected “on-crop” years, thus managing crop load and increasing fruit size at harvest. The objective of this trial was to assess flowering and fruit size responses to Ralex® in the Sunraysia region of Australia. Navel trees were sprayed with different Ralex® concentrations (0 ml, (Control), 100 ml, 150 ml or 200 ml.100 L-1) at five different times between May and July, 2003. Data on flowering indicated that Ralex application on 6 May at 200ml.100 L-1 reduced the proportion of leafless inflorescences by 62% as compared to control. Ralex application at 200 ml.100 L-1 caused an increased in proportion of larger fruit size by 47% as compared to control. | |
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