Chapter 2. IPM, pesticides, and knowledge. Pages 33-59.

Keywords: pesticides and sustainability in IPM, the economic injury concept, types of thresholds employed in crop protection, a comparison of economic, biological, and action thresholds and injury, sampling a part of IPM, knowledge and IPM, the inductive and deductive approaches to science, the proposed two pressures in the selection of IPM as the dominant paradigm in crop protection, extension and IPM, comparison of transfer of technology and farming systems research approaches to agricultural extension