ISHS Acta Horticulturae 785: International Symposium on Grape Production and Processing
EFFECT OF CLUSTER CLIPPING AND BERRY THINNING ON YIELD AND QUALITY OF THOMPSON SEEDLESS GRAPES |
| Authors: | R.G. Somkuwar, S.D. Ramteke, J. Satisha |
| Keywords: | Tas-A-Ganesh, cluster, thinning, clipping, bunch weight, yield |
| Abstract:
After forward pruning bunch appears on 5th leaf stage in Thompson Seedless and its clones. To achieve the bold berries with more than 18 mm diameter for export market, the cultural practices are to be followed correctly from the parrot green colour stage up to the harvest of bunch. A field experiment was therefore conducted to study the effect of cluster clipping and berry thinning on yield and quality of Thompson Seedless grapes grafted on Dogridge rootstock. The clusters were retained (75, 65 and 50%) by clipping the remaining portion by following standard practices of thinning of rachis of the bunch. Maximum bunch weight (381.0 g) was recorded when 75% total length of cluster was retained and berries in a bunch were thinned as compared to the control where no cluster clipping and berry thinning was performed. Berry diameter was increased from 16.94 mm in control to 21.32 mm in 50% cluster retained and berry thinning treatment. The maximum berry weight was recorded in 75% cluster retention and berry thinning treatment as compared to other treatments studied. The highest TSS of 19.86 °Brix was recorded in 50% cluster retention treatment compared to the control. Significantly highest yield/vine was recorded in 75% cluster retention and berry thinning treatment. Considering bunch and berry characters, the cluster retention up to 75% and berry thinning as per the package of practices seems to be ideal in Thompson Seedless grapes for better quality production. | |
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