PJB-2010-178
ERRY SIZE OF THOMPSON SEEDLESS AS INFLUENCED BY THE APPLICATION OF GIBBERELLIC ACID AND CANE GIRDLING
TALEB R. ABU-ZAHRA
Abstract
The influence of GA3 application on the fruit quality and productivity of cane pruned Thompson seedless was evaluated. Four treatments applied were: GA3, Girdle, GA3 + Girdle and control with no GA3 and no girdle were used. GA3 or GA3 + Girdle berries resulted in heavier berries, hastened berry diameter, and produced larger berries in comparison to the control grapevine trees. In addition, bunch weight and length were increased, while number of berries per bunch was not affected by the applied treatments. Percentage of berry shattering was increased in all grapevine treatments compared to the control treatment. On the other hand, berry quality was improved by GA3 application as indicated by soluble solids and titratable acidity. It can be concluded that GA3 is an effective method for improving Thompson seedless grapevine berries compared with girdle treated bunches.
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