author(s)
Rifat Alam and Mujibur Rahman Khan

abstract
An experiment was carried out to evaluate the efficiency of different biopesticides against the fruit fly infestation on bottle gourd. All of the treatments were effective compared to control. Among the treatments, Spinosad (Tracer 45 SC) performed the best based on minimum percent fruit infestation on both number and weight basis (30.71% & 32.64%) & highest percent protection of fruit over control (60.86% & 58.94%). Again, the highest marketable fruit yield (60.43 ton/ha) and percent yield increase of marketable fruit (70.46%) were also observed on Spinosad (Tracer 45 SC) treated plot. Based on the same parameters, Neem oil was inferior to Spinosad (Tracer 45 SC), which was followed by the treatment of Abamectin (Ambush 1.8 EC), Allamanda leaf extract and Mahogany oil. Thereby among all the treatments tested, Spinosad (Tracer 45 SC) may be suggested for cucurbit fruit fly management on bottle gourds.