Bio-efficacy Studies of Unique in Relation to Growth, Yield and Shelf Life of Super Sonaka Grape Variety Grown in Sangli Region of Maharashtra

R. G. Somkuwar *

Department of Horticulture, ICAR-National Research Centre for Grapes, Pune, Maharashtra, 412307, India.

Sadashiv Landage

Department of Procare Crop Science, Plot No: H-36 M.I.D.C., Kupwad, Sangli, Maharashtra, 416436, India.

P. S. Gharate

Department of Horticulture, VNMKV, Parbhani, Maharashtra, India.

P. S. Karande

ICAR-National Research Centre for Grapes, Pune, Maharashtra, 412307, India.

P. B. Kakade

Department of Horticulture, PGI, MPKV, Rahuri, Maharashtra, 413722, India.

*Author to whom correspondence should be addressed.


Abstract

The effect of Unique (bio-stimulant) was studied on yield and quality of Super Sonaka, elongated grape variety by applying different doses through foliar sprays (20, 25 and 30 ml/L) at five key stages of growth (12-13 days after fruit-pruning, 23-25 days after fruit-pruning, at 75-100% flowering, at 100% fruit set (2 mm berry size) and 8-10 days after fruit set). Among the different treatments, the foliar application of 30 ml/L significantly improved several growth and yield parameters including leaf area (163.1 cm²), average bunch weight (580.5 g), 50-berry weight (200.18 g), berry length (28.4 mm), berry diameter (17.2 mm) and yield (20.92 kg/vine) respectively. Biochemical attributes like phenol content (0.54 mg/g), protein (14.9 mg/g), reducing sugar (297.3 mg/g), calcium (48.9 ppm) and phosphorus (0.315%) were also improved with reduction of post-harvest loss (PLW) upto 5.2%. Additionally, the pedicel and skin thickness increased to 0.560 mm and 0.186 mm, respectively. Therefore, the foliar application of 30 ml/L of Unique at these five stages is recommended to optimize both the quality and yield of Super Sonaka grapes.

Keywords: Bio stimulant, unique, grapes, yield, quality


How to Cite

Somkuwar, R. G., Sadashiv Landage, P. S. Gharate, P. S. Karande, and P. B. Kakade. 2025. “Bio-Efficacy Studies of Unique in Relation to Growth, Yield and Shelf Life of Super Sonaka Grape Variety Grown in Sangli Region of Maharashtra”. Archives of Current Research International 25 (1):98-106. https://doi.org/10.9734/acri/2025/v25i11041.