Abstract
A field experiment was undertaken to evaluate the efficiency of Boron and Gibberellic Acid (GA3) on fruit setting phenomenon in Olive cultivar Gemlik at the Experimental area in Olive fruit orchard at NARC, HRI during 2010-2011. The Olive plants were sprayed with 3 concentrations of Boron i.e. 0.03, 0.06 and 0.09 % and GA3 in 3 concentrations i.e. 20, 25 and 30 ppm after flowering opening. The results showed that maximum flowering (No. 789) with the application of Boron treatment @ 0.09%, while GA3 maximum flowering (No. 422) with 30 ppm treatment. Maximum percent fruit setting (26.5) was recorded with GA3 spray @ 30ppm, and it was followed by the application of GA3 @ 25ppm (21.25) and maximum fruit setting (13.07) was observed with Boron treatment and @ 0.09%. Maximum fruit setting on the basis of total number of flowers was also observed in the application of GA3 treatment @ 30ppm (7.53%). Maximum number of fruits, fruit size and fruit yield observed with 30ppm GA3 was 75.00, 3.569cm and 3.425 kg, respectively and maximum fruits, fruit size and fruit weight was recorded with Boron treatment @ 0.09% was 65.30, 3.372 cm and 3.342 kg, respectively. It may be concluded that application of Boron @ 0.09% and GA3 @ 30ppm was optimum for the maximization in number of flowers, fruit set, fruit size and even fruit weight in Olive cv “Gemlik”
