Chemical defence by means of toxins poisonous to otherorganisms, be they animals or plants, is widespread amongstthe plant kingdom – including microorganisms as well. Thisbook embraces the analysis of a wide range of plant toxinsand this fills a gap in the plant pathology and ecologicalbiochemistry fields. The topics covered include toxicextracellular enzymes, host selective toxins, elicitors, phototoxins, aflatoxins, mycotoxins, and ecotoxic substancetests by pollen germination and growth. The analyticalprocedures, which are used to evaluate the toxins, arecovered in such a way that the reader is able to carry themout mostly solely by following the detailed descriptions.