10.22376/ijpbs.2019.10.1.p1-12 Volume 4 Issue 4 2013 (October - December) The coconut Rhinoceros beetle ( lessThan i greaterThan Oryctes rhinoceros lessThan /i greaterThan ) is one of the most damaging insect to coconut palms in India. The experimental study on the growth response of 3 lessThan sup greaterThan rd lessThan /sup greaterThan instar larvae of lessThan i greaterThan Oryctes rhinoceros lessThan /i greaterThan infesting the coconut trees. The LC lessThan sub greaterThan 50 lessThan /sub greaterThan /96 hours value for the larvae of lessThan i greaterThan Oryctes rhinoceros lessThan /i greaterThan were 29.5% for neem cake powder, 24.5% for neem oil and 14.9% for distillery effluent respectively. In the present study, it was observed that the entire larval growth was affected with this bio-pesticides and distillery effluent irrespective of its experimental concentrations. The reduced weight of the larval forms exposed to different concentrations of bio-pesticides and distillery effluent were clear indication of their deterrent activity and they totally affect the larval growth, since no one was undergone pupation. Even mortality occurred at the midst of this experimental duration in higher concentration. The overall data indicated that the distillery effluent caused antifeedent activity ultimately leading to deterrant activity, of larval forms. K. MOHAN AND A. M. PADMANABAN Rhinoceros beetle, Neem Oil, Neem Cake, Distillery Effluent, 3rd Instar larvae. 102-110