author(s)
Siddique AB, Bachchu MAA, Uddin MN, Rahman MH, Bhuyain MMH, and Rana MS

abstract
The study was conducted to evaluate the efficacy of six indigenous plant extracts for their anti ovipositional and repellent effects against cucurbit fruit fly, Bactrocera cucurbitae (Coqullet) in ambient laboratory conditions (27±2⁰C, 70% RH) using three different solvents. All the plant extracts had different effect of repellent and anti oviposition as well as effective for controlling B. cucurbitae. The order of toxicity was found as tobacco > neem > water pepper > castor > bullock’s heart > eucalyptus and the solvents toxicity was acetone > methanol > water at 5.0% concentration. The lowest number of larvae (2.67), pupae and adult emergence (2.00) were found at 4.0% concentration whereas the highest larvae (10.00), pupae and adult emergence (8.00) were found at 0.5% concentration. However, the highest percent repellency were observed (80.22%) at 4.0% concentration whereas the lowest were observed (27.66%) at 0.5% concentration. The highest anti oviposition was observed in tobacco (77.48%) at 4.0% concentration which was statistically similar to (63.36%) 2.0% concentration of plant extracts.