Plant Pathology - 2nd Edition - ISBN: 9780120445608, 9780323161350

Plant Pathology

2nd Edition

Authors: George Agrios
eBook ISBN: 9780323161350
Imprint: Academic Press
Published Date: 1st January 1978
Page Count: 716
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Plant Pathology, Second Edition incorporates developments in identifying pathogens and disease diagnosis. This book is organized into two major parts encompassing 16 chapters that discuss general aspects of plant diseases and specific plant diseases caused by various microorganisms.

This edition includes chapters or sections on diseases caused by mycoplasma-like organisms, rickettsia-like bacteria, viroids, and protozoa. Information on the genetics of plant diseases, the development of resistant varieties, and their vulnerability to new pathogen races is added in this release. It also includes information on the development of epidemics. The presentation of these topics is followed by a discussion on systemic fungicides and biological control of diseases, as well as postharvest diseases of plant products. Furthermore, this edition also explains mycotoxins and mycotoxicoses, as well as techniques of isolation, culturing, indexing, and identification of pathogens. It also studies mycorrhiza and root-nodule bacteria.

Considerable chapters describe diseases caused by fungi and those caused by bacteria, which have been organized in logical, cohesive groups according to their most important symptoms. Diagrams of disease cycles, groups of pathogens and symptoms, and techniques and concepts of plant pathology are incorporated in each chapter. Moreover, this edition provides numerous photographs (macroscopic, microscopic, electron micrographs, and scanning electron micrographs) that illustrate concepts, pathogens, and symptoms.

Teachers and students who are interested in plant pathology and plant diseases and control will find this book very helpful.

Table of Contents

Part 1 General Aspects

1. Introduction

The concept of disease in plants

Classification of plant diseases

History of plant pathology

Importance of plant diseases

Diagnosis of plant diseases

Identification of a previously unknown disease—Koch's postulates

2. Parasitism and disease development

Parasitism and pathogenicity

Host range of pathogens

Stages in the development of disease

3. How pathogens attack plants

Mechanical forces exerted by pathogens on host tissues

Chemical weapons of pathogens

Growth regulators in plant disease

4. Pathogen effects on plant physiological functions

Effect of pathogens on photosynthesis

Effect of pathogens on translocation of water and nutrients in the host plant

Effect of pathogens on host plant respiration

5.How plants defend themselves against pathogens

Structural defense

Biochemical defense

6. Genetics and plant disease


Mechanisms of variability

Stages of variation in pathogens

Types of plant resistance to pathogens

Genetics of virulence in pathogens and of resistance in host plants

Breeding of resistant varieties

7. Effect of environment on development of infectious plant diseases

Effect of temperature

Effect of moisture

Effect of wind

Effect of light

Effect of soil pH

Effect of host-plant nutrition

The role of environmental factors in plant disease epidemics

Weather and forecasting of plant disease epidemics

8. Control of plant diseases

Regulatory methods

Cultural methods

Biological methods

Physical methods

Chemical control

Part 2 Specific Plant Diseases

9. Environmental factors that cause plant diseases




Inadequate oxygen


Air pollution

Nutritional deficiencies in plants

Soil minerals toxic to plants

Herbicide injury

Other improper agricultural practices

10. Plant diseases caused by fungi


Characteristics of plant-pathogenic fungi

Classification of plant-pathogenic fungi

Isolation of fungi (and bacteria)

Life cycles of fungi

Control of fungus diseases of plants

Diseases caused by the lower fungi

11. Plant diseases caused by bacteria


Characteristics of plant-pathogenic bacteria

Bacterial spots and blights

Bacterial vascular wilts

Bacterial soft rots

Bacterial galls

Bacterial cankers

Bacterial scabs

Root nodules of legumes

Plant diseases caused by rickettsialike bacteria

12. Plant diseases caused by mycoplasmalike organisms


Properties of mycoplasmas

Other organisms that resemble mycoplasmas: L-forms of bacteria

Examples of plant diseases caused by mycoplasmalike organisms

13. Plant diseases caused by parasitic higher plants


14. Plant diseases caused by viruses


Characteristics of plant viruses

The biological function of viral components—coding

Virus infection and virus synthesis

Translocation and distribution of viruses in plants

Symptoms caused by plant viruses

Physiology of virus-infected plants

Transmission of plant viruses

Purification of plant viruses

Serology of plant viruses

Nomenclature and classification of plant viruses

Identification of plant viruses

Economic importance of plant viruses

Control of plant viruses

Plant diseases caused by viroids

15. Plant diseases caused by nematodes


Characteristics of plant-pathogenic nematodes

Isolation of nematodes

Symptoms caused by nematodes

How nematodes affect plants

Control of nematodes

16. Plant diseases caused by protozoa

General References




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© Academic Press 1978
Academic Press
eBook ISBN:

About the Author

George Agrios

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