Reports on the nature of allelochemicals, the natural defense mechanisms of plants. Looks at the mechanisms and rates of allelochemical emissions from the aggressive plant, their fate in the soil and their uptake, and translocation and mode of action within the receptive plant. Examines the allelopathic phenomenon in sections covering plant-plant and plant-soil-plant interactions; plant-insect interaction; and plant-microbial and plant-animal interactions. Contains significant new ideas for maintaining and increasing forest and agricultural production in the future.