This experiment was conducted at Birganj Upazilla under Dinajpur district during 2008-2009 to know the effects of different organic components on the incidence of insect pest and diseases of eggplant. There were six treatments viz. use of chemical fertilizers (@ recommended dose), poultry refuse (@ 80 g pit-1), mustard oil cake (@ 80 g pit-1), vermi-compost (@ 200 g pit-1), cow-dung (@ 500 g pit-1) and Trichoderma (@ 2 g pit-1). Eggplant was selected as test crop. The plants were attacked by Phomopsis, bacterial wilt and root knot diseases in different treatments, but statistically there were no significant differences. The highest plant height (cm), number of flower plant-1 and yield was performed by the treatment use of Poultry Refuses (@ 80 g pit-1). The highest number of branching plant-1 was found in treatment use of Poultry Refuses (@ 80 g pit-1) and use of vermi-compost (@ 200 g pit-1).