Investigations were carried out on “Bionomics of fruit fly, Bectrocera cucurbitae (Coquillet) on cucumber under laboratory condition” at Department of Entomology, College of Agriculture, Junagadh Agricultural University, Junagadh during kharif2015 on cucumber variety dharwad green. Observations on various life stages were made at a 0C to 0C temperature (Av. 0C ± ) and to per cent relative humidity (Av. ± % RH). The eggs were laid in the fruit tissues. The average incubation period was found to be ± hours. | Bionomics of fruit fly, bectrocera cucurbitae (Coquillet) on cucumber under laboratory condition