This is a new release of the original 1925 edition.

Plant disease epidemics, caused by established and invasive pathogen species, continue to impact a world increasingly concerned with the quantity and quality of its primary food supply. The Study of Plant Disease Epidemics is a comprehensive manual that introduces readers to the essential principles and concepts of plant disease epidemiology.

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Excerpt from Laboratory Outlines in Plant Pathology These outlines are designed solely for the purpose of most effectively acquainting the student with the laboratory materials presented in this course. They are the result of several years of experience and test in actual practice work. They have been frequently revised. It is expected that they will now be revised and reprinted at least every two years. Although the acquisition of a body of facts is an important and necessary part of the work in such a course a. more vital feature is the training in logical methods of acquiring them. The student is urged to follow his outline carefully, making sine at each step, that the outline and the materials before him agree. The same sequence of treatment is followed throughout all the outlines. This sequence in procedure should be mastered promptly. The term papers will afford opportunities for determining how well the student has grasped the logic of this procedure. The grouping of diseases here presented is, we believe, an important step in diverting attention from the domination of systematic mycology in phytopathological teaching and writing, and of directing it toward the more logical classification and study of diseases on the baas of the pathological phenomena exhibited. At the same time the subgrouping of the diseases, according to the chief etiologic factor involved, provides for a point of view still generally presented in the teaching of plant pathology. It is not expected that all the diseases herein outlined will be covered in a three hours course. The instructor will make such selections from the different groups as will best serve his purpose in illustrating the fundamentals of the subject in the case of the students in his classes. No laboratory practice in the methods of control of the disease studied is provided. That phase of the subject is fully treated in the course based upon and following this, namely. The Principles of Plant Disease Control. These outlines are designed specifically for the work as given at Cornell University and without any attempt to adapt them for use in other institutions. It is hoped, however, that teachers elsewhere may at least find them helpful and possibly usable in their classes. Acknowledgments are due Mr. Chas. Chupp, instructor in the department of Plant Pathology for the preparation of a number of the outlines. We also gratefully acknowledge the friendly advice and assistance of the Comstock Publishing Company in our effort to make the cost of these -outlines to the student as reasonable as possible. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Modern plant pathology. Definitio, symptoms and classification of plant diseases. Methods of investigating plant diseases. Plant diseases as related to environment. Plant diseases control: General statement., Fungicides. Disease-free seed and nursery stock. Quarantine and inspection. Sick soil. Disease resistance in plants. Relatio of Insects to plant diseases. Diseases caused by slime Molds. Diseases caused by bacteria. Disease caused by fungi - phycomycetes. Diseases caused by fungi - ascomycetes. Diseases caused by fungi - basidiomycetes. Diseases caused by fungi-imperfecti. Diseases caused by algae. Diseases caused by parasitic seed plants. Diseases caused by nematodes. Virus diseases. Non-parasitic diseases.