DOI: 10.36347/sajb.2014.v02i06.001

Pages: 364-369

Brinjal shoot and fruit borer (BSFB), Leucinodes orbonalis Guenee, is a serious pest of brinjal or eggplant (Solanum melongena L.). Due to increasing levels of resistance of L. orbonalis to different insecticides there is an urgent need to test new chemicals. Studies were carried out in the Entomology Field Laboratory, Bangladesh Agricultural University (BAU) to evaluate the efficacy of three insecticides viz., impale 20SL (imidacloprid), advantage 20EC (carbosulfan), libsen 45SC (spinosad) against the infestation of L. orbonalis. All the tested insecticides were found to be effective in controlling brinjal shoot and fruit borer although spinosad was the most effective. Minimum shoot damage and maximum protection was provided by spinosad (libsen 45SC) which was followed by carbosulfan (advantage 20 EC) and imidacloprid (impale 20 SL). Similarly, minimum fruit damage and maximum protection was also provided by spinosad but in contrast with shoot damage, imidacloprid was found comparatively effective than carbosulfan although the difference was insignificant. Moreover, minimum fruit loss and maximum protection was provided by spinosad which was followed by imidacloprid and carbosulfan. Therefore, all the insecticides were found significantly effective in comparison with that in the water-treated control regarding shoot and fruit damage as well as fruit losses caused by L. orbonalis. In conclusion, the comparative efficacies of the selected insecticides were spinosad>imidacloprid>carbosulfan to protect shoot and fruit damage of brinjal caused by L. orbonalis.