Journal of Horticultural Sciences

R. G. Somkuwar ¹, S. D. Ramteke ¹, J. Satisha ¹, Mahadev Bhange ¹, Prerna Itroutwar ¹

Affiliations
1 National Research Centre for Grapes, Pune - 412307, IN

Abstract

Effect of canopy manipulation during forward pruning on berry development and photosynthetic parameters was studied in Tas-A-Ganesh grape grafted onto Dogridge ischolar_mainstock. Canopy manipulation including shoot thinning, leaf removal, shoot thinning with leaf removal, and shoot pinching, was done after forward pruning. Significant differences were observed in yield and quality. Shoot thinning to about 40 shoots per vine, with removal of three basal leaves, resulted in significantly higher yield, followed by that in shoot thinning alone. Lowest yield was recorded in the Control. Leaf removal drastically reduced bunch development affecting berry weight, diameter and length compared to other treatments. Among different canopy manipulation treatments, higher average bunch weight was recorded in shoot thinning plus leaf removal, whereas, lowest bunch weight was recorded with leaf removal alone. At harvest, the amount of total soluble solids in berries was low in leaf removal at pre-bloom stage, but increased in the treatment of shoot thinning with leaf removal, at the same stage. Different canopy manipulation treatments had significant impact on photosynthesis and transpiration rates. Overall results indicated that canopy manipulation practices such as shoot thinning, to retain 40 shoots per vine with or without leaf removal, followed by pinching, can be recommended to grape growers.

Keywords

Grape, Canopy Managements Practices, Photosynthesis, Quality, Yield.

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R. G. Somkuwar ¹, J. Satisha ¹, S. D. Ramteke ¹

Affiliations
1 National Research Centre for Grapes, P.O. Box 03, Manjri Farm Post, Pune - 412 307, IN

Abstract

A field trial was conducted to determine the effect of cane thickness on berry quality and other biochemical parameters in 'Tas-A-Ganesh' grape at National Research Centre for Grapes, Pune, during the year 2008- 2009. Average bunch weight increased with increase in cane diameter. Own-ischolar_mained vines of cane thickness <6mm sprouted earlier than thicker canes. TSS of berries decreased with increase in berry size. Berries on grafted vines recorded lower TSS than on own-ischolar_mained vines. Biochemical parameters such as content of reducing sugars, carbohydrat and phenols were higher in grafted vines of cane thickness >10mm. Results indicate that thicker canes either on their own ischolar_mains or on grafted vines are superior for yield and yield components, as also for physical properties of bunches and berries and total carbohydrate content of the canes.

Keywords

Tas-A-Ganesh, Sprouting, Cane Thickness, Bunch Weight, Total Soluble Solids, Reducing Sugars, Carbohydrates.

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