Effect of plant bioregulators on yield and quality of Kinnow mandarin

Effect of plant bioregulators was assessed on yield and quality of Kinnow mandarin (Citrus reticulata Blanco.) in the subtropical climate of Jammu. The trial was laid in randomized block design and the experiment comprised of ten plant bioregulator treatments replicated thrice. Least fruit drop (16.21%) and maximum fruit yield (31.10 kg/tree) was recorded with 20 ppm 2, 4-D application. However, maximum fruit weight (109.30 g), fruit length (66.90 mm), fruit diameter (76.70 mm), fruit volume (113.89 cm3) and juice percentage (55.80%) was recorded with 75 ppm GA3. Among different chemical parameters highest TSS (12.70 °B), acidity (1.38%), reducing sugars (3.48%), non-reducing (5.06%) and total sugars (8.65%) were observed under 15 ppm NAA application. Among the treatments applied, 20 ppm 2, 4-D resulted in least fruit drop, however fruit quality was better with the application of 75 ppm GA3 and 15 ppm NAA application.