Combined effect or synergistic effect of various control agents have proved very advantageous in the control of various pests. The Pongamia extract has been considered as a good synergist and hence has been combined with several pest control agents in the control of various pests. In the present study likewise the Pongamia extract has acted as a powerful synergist with A. squamosa. Individual plant extracts are active only at high concentration, which makes them uneconomical for field use