Indian Journal of Horticulture
  • Year: 1972
  • Volume: 29
  • Issue: 3and4

Effect of Plant Growth Regulators on Fruit Set, Fruit Drop and Quality of Saharanpur Special Variety of Grapefruit (Citrus Paradisi Macf.)

  • Author:
  • B. S. Chundawat1, G. S. Randhawa2
  • Total Page Count: 6
  • Page Number: 277 to 282

1Horticulturist Department of Horticulture, Haryana Agricultural University, Hissar.

2Indian Institute of Horticultural Research, 255, Upper Palace Orchards, Bangalore-6.

Indian Agricultural Research Institute, New Delhi.

Abstract

Present investigations on Saharanpur Special grapefruit revealed that GA (500, 750 add 1000 ppm) and 2, 4-D (7.5, 10 and 20 ppm) had substantially increased the fruit set. All the plant regulators except 2, 4, 5-T (10 ppm) reduced the June-drop. However, maximum reduction was obtained with GA (500–750 ppm) C1PA 75 ppm) 2, 4, 5-T (7.5 ppm) and 2, 4-D (10 ppm). Besides, GA (100, 750 and 1000 ppm) C1PA (100 ppm) 2, 4-D (7.5 ppm) and 2, 4, 5-T (20 ppm) retained maximum fruits against the pre-harvest drop. Gibberellic acid treatments increased the fruit size significantly over other treatments. However, the internal quality was poor comparatively. There was not much of effect on quality except C1PA (50, 75 and 100 ppm), 2, 4-D (5 and 7.5 ppm) and 2, 4, 5-T (7.5 and 20 ppm) increased the sugar and vitamin C contents.