Effect of pre-harvest application of GA3, triacontanol and calcium salts on yield and physical characters of Kinnow fruits harvested on different dates

The study on the effect of pre-harvest chemical treatments in Kinnow mandarin was conducted at Khalsa College, Amritsar for two years. Pre-harvest foliar application of GA3 (10, 20, 30ppm), triacontanol (400, 600ppm), CaCl2 (4, 6%) and Ca(NO3)2 (0.1, 0.2, 0.3%) was given to the Kinnow plants of fifteen years of age. The harvesting of the fruits was done on January 1st, January 15th, February 1st and February 15th during both the years and yield of the fruits was calculated along with their physical analysis. It was observed that the maximum fruit yield to the tune of 54.88kg/plant was recorded with the application of GA3 at 30ppm and it was proved to be the most efficacious treatment for improving fruit quality in respect of fruit size, weight and juice con tent. Maximum peel thickness was ob served with CaCl2 at 6 per cent.