Introduction: an overview of biorational pest control agents, Franklin R. Hall and John W. Barry, Part 1 Registration needs and data requirements: registration of biologicals: how product formulations affect data requirements, Michael L. Mendelsohn et al; a generic approach to minimizing impact on non-target species in Canada, R.E. Mickle. Part 2 Basic information needs: ecological factors critical to the exploitation of entomopathogens in pest control, James R. Fuxa; modelling the dose acquisition process of bacillus thuringiensis - influence of feeding Pattern on survival, Franklin R. Hall et al. Part 3 Delivery and environmental fate: delivery systems for biorational agents, William E. Steinke and D. Ken Giles; environmental fate and accountancy, M.E. Teske et al; factors affecting spray deposition, distribution, coverage and persistence of biorational control agents in forest canopies, Alam Sundaram; photostability and rainfastness of tebufenozide deposits on fir foliage, Kanth M.S. Sundaram; radiation protection and activity enhancement of viruses, Martin Shapiro. Part 4 Soil biorationals: formulation and delivery of biocontrol agents for use against soilborne plant pathogens, R.D. Lumsden et al; metarhizium anisopliae for soil pest control, M.R. Schwarz; formulation of entomopathogenic nematodes, R. Georgis et al. Part 5 Foliar biorationals: pheromone formulations for insect control in agriculture, Janice Gillespie et al; commercial development of entomopathogenic fungi - formulation and delivery, David W. Miller; development of novel delivery strategies for use with genetically enhanced baculovirus pesticides, H. Alan Wood and Patrick R. Hughes; starch encapsulation of microbial pesticides, M.R. McGuire and B.S. Shasha; utilization criteria for mycoherbicides, G.J. Weidemann et al, C.D. Boyette and G.E. Templeton; biological weed control technology - an overview, N.E. Rees et al. Part 6 Forest biorationals: use of insect pheromones to manage forest insects: present and future, Patrick J. Shea; impact of bacillus thuringiensis on non-target lepidopteran species in broad-leaved forests, R.C. Reardon and D.L. Wagner.