In trial 1, all thinning treatments caused increased rates of
flower drop, which resulted in decreased bunch weight, berry number,
bunch compactness and yield per plant (p-value ≤ 0.01), with
a significantly greater effect in both shade treatments (Table 2 and
Fig. 3). The two shade treatments resulted in an average of 98.7%
flower drop, whereas GAc-35 ppm a lower percentage of 83.0%
was observed. In shade treatments, bunch weight and yield per
plant were reduced to only 10% of those measured in control vines.
In GAc-35 ppm treatment bunch weight, compactness, number of
berries and yield were reduced in average to 54.5% of the control