Abstract: The influences of four levels of plant growth regulators on BARI Misti Morich-1 and Lamuyo varieties of bell pepper were studied at the horticulture farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh from October 2012 to March 2013. Plant Growth Regulators (PGR) was applied on bell pepper varieties which had significant effect on yield of bell pepper. Among those treatments, growth regulator 4-CPA was more potential to enhance flowering by 4.00 days earlier and it also increased number of flowers plant-1 (5%), number of fruits plant-1 (35%), fruit setting (26.02%) and yield of fruit per hacter (39%) with the varieties of Lamuyo as compared to the fruit set where hormone was not applied. The variety Lamuyo produces about 10% higher yield than BARI Misti morich-1. Among those, growth regulator, 4-CPA showed best potentiality to solve flower and fruit dropping problem of bell pepper.