ABSTRACT

The present study was conducted to find out suitable bio-pesticides for the control of okra shoot and fruit borer to improve the production and quality of okra in Bangladesh. Three insecticides namely-Spinosad (Success 2.5 SC), Emamectin benzoate (Suspend 5SG) and Beauveria basssiana (1×108 CFU/100 ml) were evaluated with recommended dose using okra variety ‘BARI Dharos-1’. Emamectin benzoate and Spinosad were found the more effective for the reduction of shoot and fruit infestation caused by Earias vittella in okra field than fungal insecticide Beauveria basssiana. The shoot infestation after 3rd spray was 22.25, 2.33, 0.00, and 12.00% in untreated control, Spinosad, Emamectin benzoate and Beauveria bassiana treated plants, respectively. The fruit infestation after 3rd spray was 11.32, 3.17, 2.25, and 6.00% in untreated control, Spinosad, Emamectin benzoate and Beauveria bassiana treated plants, respectively. The highest yield was increased in Emamectin benzoate treatment over control (48.25%), followed by Spinosad (40.84%) and Beauveria bassiana (13.70%) treatments. Considering the fruit infestation and yield of okra plants, Emamectin benzoate and Spinosad were found effective bio-pesticides against E. vittella under field condition and therefore, may be recommended for the management of okra shoot and fruit borer.

Key words: Bio-pesticides, management, okra shoot and fruit borer