Contributors. Preface. Section 1: The Entomopathogenic Bacteria. 1.1. Biodiversity of the entomopathogenic, endosporeforming bacteria; F.G. Priest. 1.2. Natural occurrence and dispersal of Bacillus thuringiensis in the environment; P.H. Damgaard. 1.3. Virulence of Bacillus thuringiensis; B.M. Hansen, S. Salamitou. Section 2: Toxins and Genes. 2.1. The diversity of Bacillus thuringiensis d-endotoxins; N. Crickmore. 2.2. Insecticidal proteins produced by bacteria pathogenic to agricultural pests; T. Yamamoto, D.H. Dean. 2.3. Vector-active toxins: structure and diversity; A. Delecluse, et al. 2.4. Toxin and virulence gene expression in Bacillus thuringiensis; D. Lereclus, H. Agaisse. 2.5. Genetic and genomic contexts of toxin genes; M.-L. Rosso, et al. Section 3: Mode of Action and Resistance. 3.1. Pathogenesis of Bacillus thuringiensis toxins; P. Luthy, M.G. Wolfersberger. 3.2. Investigations of Bacillus thuringiensis Cry1 toxin receptor structure and function; S.F. Garczynski, M.J. Adang. 3.3. Membrane permeabilisation by Bacillus thuringiensis toxins: protein insertion and pore formation; J.-L. Schwartz, R. Laprade. 3.4. Insect resistance to Bacillus thuringiensis insecticidal crystal proteins; J. Van Rie, J. Ferre. 3.5. Mode of action of Bacillus sphaericus on mosquito larvae: incidence on resistance; J.-F. Charles, et al. Section 4: Safety and Ecotoxicology. L.A. Lacey, J.P. Siegel. Section 5: Standardisation, Production and Registration. 5.1. Is Bacillus thuringiensis standardisation still possible? O. Skovmand, et al. 5.2. Industrial fermentation and formulation of entomopathogenic bacteria; T.L. Couch. 5.3. Rural production of Bacillus thuringiensis by solid state fermentation; E. Aranda, et al. 5.4. Registration of biopesticides; G.N. Libman, S.C. MacIntosh. Section 6: Field Application and Resistance Management. 6.1. Bacillus thuringiensis application in agriculture; A. Navon. 6.2. Application of Bacillus thuringiensis in forestry; K. van Frankenhuyzen. 6.3. Bacterial control of vector-mosquitoes and black flies; N. Becker. 6.4. Resistance management for agricultural pests; R.T. Roush. 6.5. Management of resistance to bacterial vector control; L. Regis, C. Nielsen-LeRoux. Section 7: Biotechnology and Risk Assessment. 7.1. Biotechnological improvement of Bacillus thuringiensis for agricultural control of insect pests: benefits and ecological implications; V. Sanchis. 7.2. Genetic engineering of bacterial insecticides for improved efficacy against medically important Diptera; B. Federici, et al. 7.3. Bacillus thuringiensis: risk assessment; A. Klier. Index.