Journal of Horticultural Sciences

S. D. Shikhamany ¹, Swapnil V. Borade ¹, Sanjay K. Jeughale ¹, Suryakant Y. Patil ¹

Affiliations
1 Research and Development Unit, Maharashtra State Grape Growers' Association, Manjri Farm Post, Pune-411 037, Maharashta, IN

Abstract

Efficiency of two table grape vineyards each of Thompson Seedless and Tas-A-Ganesh located around Nashik, Maharashtra, were assessed over two cropping seasons based on a score-card developed assigning weights and matrices for various attributes of yield and quality, in accordance with their relative contribution going by established facts on a 100 point scale. The objectives of the study were to draw up a benchmark to evaluate the efficiency of table grape vineyards, analyze the reason for low efficiency, and suggest remedial measures. In addition to the yield, bunch and berry characters are important in table grape production. Skilful management of attributes for yield and quality using available technologies determines efficiency of a vineyard. In general, the efficiency of vineyards was better during the 2014-15 cropping season compared to 2013-14, and that of 'Thompson Seedless' vineyards was higher than Tas-AGanesh. In 'Thompson Seedless', efficiency of Vineyard-1 was better than Vineyard-2 as also in Tas-A-Ganesh. Based on their total score, individual vineyards were ranked as Excellent/Very good/Good/Average/ Below average, year wise. Lacunae in management leading to poor scores were identified to serve as a guide to improvement.

Keywords

Vineyard Efficiency, White Table Grape, Score Card, Evaluation, Analysis.

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S. D. Shikhamany ¹, Sanjay K. Jeughale ², Kailas N. Khapre ², R. Venugopalan ³

Affiliations
1 Research and Development Unit, Maharashtra State Grape Growers’ Association, Manjri Farm Post, Pune-411 032, IN
2 Research and Development Unit, Maharashtra State Grape Growers' Association, Manjri Farm Post, Pune-411 032, IN
3 Section of Economics and Statistics, ICAR-Indian Institute of Horticultural Research, Hesaraghatta Lake Post, Bengaluru - 560089, IN

Abstract

To study variation in the relationship between yield and yield attributes in 'Thompson seedless', 'Tas-A-Ganesh' and '2A clone' vines grafted onto Dogridge ischolar_mainstock and trained on the extended Y training system, data collected from 120 vines in each variety were subjected to correlation and regression analysis. Numbers of clusters per vine was the main contributing factor for yield in all these varieties. It determined the yield by 87.9, 42.0 and 51.5%, respectively, in 'Thompson Seedless', 'Tas-A-Ganesh' and '2A clone', with the optimum number of clusters at 27.3, 43.1 and 46.5, respectively. Contrary to that in vars. Thompson Seedless and Tas-A-Ganesh, increase in number of canes was associated with higher cluster/cane ratio. Yield depended upon cluster weight in 'Thompson Seedless', mediated through number of clusters, but was not a contributory factor as evidenced by a negative correlation between clusterweight and yield. Increase in cluster weight was associated with increase in number of berries in all the varieties. Increase in berry weight was related to cluster weight in only Thompson Seedless and Tas-A-Ganesh. While berry number and berry weight together determined cluster weight by 96.3 and 92.4%, respectively, in vars. Thompson Seedless and Tas-A-ganesh, this value was just 39.0% in '2A clone'. These studies provide a clue that for realizing higher yield, cluster size needs to be greater while limiting the number of canes/vine in vars. Thompson Seedless and Tas-A-Ganesh. Increase in the number of canes would benefit '2A clone' by adopting suitable cultural practices.

Keywords

Correlation, Variation, Yield, Yield Attributes, Thompson Seedless, Tas-A-Ganesh, 2A Clone.

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S. D. Shikhamany ¹, Swapnil V. Borade ¹, Sanjay K. Jeughale ¹, Suryakant Y. Patil ¹

Affiliations
1 Maharashtra State Grape Growers’ Association, Manjri Farm Post, Pune 411 032, IN

Abstract

A field trial was conducted during 2013-14 and 2014-15 fruiting seasons in growers' vineyards around Nashik, Maharashtra, India to improve efficacy of GA₃ sprays in berrythinning. As smaller clusters have fewer berries, cluster compactness derived at by number of berries per unit length (cm) of rachis, and, berry-diameter were considered as a measure of berry-thinning. As GA₃ effect in berry-thinning is stage-specific, canes uniformly thick in a vine only were retained to achieve uniformity in flowering, by inducing uniform bud-break. Cane regulation did not result in uniformity in bud-break or flowering. Blanket spray of GA₃ thrice @ 20g a.i./ha, each coupled with either removal of non-uniform canes or retention of all the canes could effectively reduce cluster compactness by reducing number of berries per cluster, without increasing total length of the rachis/cluster or berry diameter. Vine yield and quality in terms of total soluble solids and acid content were not affected by the treatments. Considering cluster-compactness, yield and ease of cultural operations, retention of all the canes in a vine, coupled with three blanket sprays each of GA₃ @ 20g a.i/ha, on alternate days commencing from initiation of the bloom, is recommended for 'Thompson Seedless'.

Keywords

Cane Regulation, GA₃ Spray, Uniform Flowering, Cluster Compactness, ‘Thompson Seedless’.

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