Part 1 The issues: introduction, Paul C. Jepson, Brian A. Croft. Issues associated with pesticide toxicology and arthropod natural enemies in the pre- and post-registration stages of chemical development, Brian A. Croft et al; The initiative of the IOBC/WPRS working group on pesticides and beneficial organisms, Sherif A. Hassan; Reducing insecticide use in plant protection in Israel - policy and programmes, (the late) David Rosen; Pesticides and natural enemies - Malaysia perspectives, Zulkifli Ayob, Normah Mustaffa; Can we achieve harmonization of regulatory requirements in Europe? Katie Barrett. Part 2 Defining the problems: Introduction, Sherif A. hassan; Standard laboratory methods to test the side-effects of pesticides, Sherif A. hassan; development and ring-testing of a standardized laboratory test for parasitic wasps, using the aphid-specific parasitoid aphidious rhopalosiphi, Michael Mead-Briggs et al; Current status of a ring-tested method to determine pesticide effects on the predatory mite typhlodromus pyri (Scheuten) (acarina - phytoseiidae) in the laboratory, Sylvia Blumel et al; Testing side-effects of pesticides on carabid beetles - a standardized method for testing ground-dwelling predators in the laboratory for registration purposes, Gerhard P. Dohmen; Testing side-effects of pesticides on spiders (pardosa spp,) in the laboratory, Udo Heimback et al; Two-step test system using the plant-dwelling non-target insect coccinella septempunctata to generate data for registration of pesticides, Richard Schmuck et al; Side-effects of pesticides on larvas of chrysoperla carnea (neuroptera, chrysopidae) - actual state of the laboratory method, Heidrun Vogt et al; Field studies with pesticides and non-target arthropods in orchards, Kevin Brown; Accuracy and efficiency of sequential pesticides testing protocols for phytoseiid mites, Frank M. Bakker; using a sequential testing achene under laboratory and field conditions with the bumble bee bombus terrestris to evaluate the safety of different groups of insecticides, Burkhard Sechser, B. Reber; testing effects of pesticides on adult carabid beetles in semi-field and field experiments, Udo Heimbach; The value of large-scale field trials for determining the effects of pesticides on the non-target arthropod fauna of cereal crops, Michael Mead-Briggs; Comparing pesticide effects on beneficials in a sequential testing scheme, Gerhard P. Dohmen. Part 3 Risk assessment and management: introduction, Pieter A. Oomen et al. Strategy: Aims and consequences of regulatory risk management in Europe - a discussion, Pieter A. Oomen. (Part contents).