The spatial aspects of epidemics have been a largely ignored feature of plant ecology, yet an understanding of the spatial dynamics for pathogens is essential to quantifying the impact of diseases on wild plants. Moreover, it may provide valuable information for the control of human diseases. This seminal work fulfills such a role by describing the basics of botanical epidemiology within the context of plant ecology. A variety of models are covered to estimate key parameters at both the individual plant and population levels, with emphasis on the value of spatial-temporal models in the evolutionary dynamics of pathogens. Practical methods are presented to validate these models, thus making this book accessible to theorists and empiricists alike.