Regional Fruit Research Station, Punjab Agricultural University, Abohar 152 116
Plant growth regulators, GA3, 2,4-D, NAA, urea were sprayed on 10 year old kinnow mandarin trees to control physiological fruit drop. The maximum check of fruit drop was observed with 2,4-D (20ppm) spray application closely followed by GA3 (15ppm). Maximum juice per cent, TSS: acidity ratio observed in 2,4-D spray treatment. 2,4-D thus proves effective for control of physiological fruit drop.
