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Effect of gibereline (GA3) and biostimulant 'Stimulate' in floral induction and yield of yellow passion fruit in conditions of normal growing season

The objective of this work was to evaluate the effects of GA3 , in concentrations of 100, 200 and 300mg L-1 and biostimulant StimulateTM, in doses of 2,08, 4,17 and 6,25 mL L-1, in two leaf applications, added with the adhesive spreader SilwettTM at 0,05% and branch exposure to brightness, on passion fruit in floral induction and yield, in conditions of normal growing season, in Araguari-MG. At 30 days after the first treatment application, the evaluation of flower number started, with daily counts, in both sides of the plants, from September 2002 to March 2003. Fruit harvest was realized weekly from November 2002 to April 2003, being observed the yield. GA3 and Stimulate did not provide significant effect on flower number in none of the seven different times, as well as on total flower number. There was no treatment effect on yield and total fruit yield. Branches under afternoon brightness presented larger flower number in September, December, February and March. Interaction between treatments and branch exposure to brightness was not significant for flower number in the evaluated times.

stimulant; flowering; Passiflora edulis f. flavicarpa; yield; plant regulators


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