The book contains 20 chapters and it would not be far wrong to say that not a single person who has made a contribution to PBO is absent from the list of contributors. Apart from such things as the properties, uses, plant metabolism, mammalian and environmental toxicology, and mode of action of PBO, also covered are such specialist subjects as the measurement of synergism in the laboratory, and the potential use of PBO alone to control whiteflies and its use with insect growth regulators. In addition, molecular modelling attempts to explain its value in formulations.