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Not AvailableA field trial was conducted to evaluate the efficacy of GA3 tablets (soluble in water) in grapes for improving the quality and yield. The trial was conducted during the season 2016-17 in grower’s vineyard located at Pandharpur (M.S.), India. The experiment was performed on Manik Chaman grape variety which was grafted on Dogridge rootstock. Different treatments of Gibberellic acid tablets (GA3 93%) and powders (GA3 90%) were applied at flowering, 3-4 mm berry stage and 6-8 mm stage of berry development. The observations of bunch weight, 100 berry weights, berry length, TSS, Acidity and yield parameters were taken at harvest. The data showed significant differences in mean bunch weight, berry size, quality and yield parameters. The mean bunch weight was recorded maximum in GA3 tablets when applied @ 40 ppm (372 g) treatments whereas it was found lowest in no application of GA3 (235.7 g). The berry sizes, skin thickness and yield per vine were also recorded significantly highest in GA3 applied plants. No symptoms of any abnormality, toxicity were found either on the leaves, canes, shoot or in grapes berries with the application of GA3 tablets up to 80 ppm concentration.Not Availabl

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Not AvailableBerry cracking, a disorder where fruit surface cracks mainly due to heavy irrigation or rain after long dry spell resulting in significant commercial losses in the table and wine grapes production. A research experiment was conducted under field conditions during the session 2016-17 at National Research Centre for Grapes, Pune to evaluate the effect of Silixol (OSA) on berry cracking in Fantasy Seedless grapes. The experiment was performed in the randomised block design, with five replications. Foliar spraying of Silixol in combination of different chemicals was applied thrice at an interval of 10 days before veraison stage. Total rainfall, temperature and humidity were also recorded timely during the experiment. Among the all treatments, T6 (Si + Ca gluconate + Boron) showed significantly lowest percentage of berry cracking followed by T8 (Si Powder + Ca gluconate + Boron) as compared to control. The quality parameters such as T.S.S. and acidity were greatly influenced by the application of Silixol. The highest total soluble solid (21.5 °β) was recorded with the application of T1 (Silixol @ 4 ml/l). Yield per hectare (20.43 t/ha) and Brix yield (234.6 t/ha) were found highest in treatment T1 (Silixol @ 4 ml/l). This approach demonstrated the ability of Silixol to reduce the berry cracking and also improve the quality of grapes.Not Availabl