The book A-Z Plant Diseases is designed particularly for the use of students and instructors whose practical interest in the subject is a desire to know how to recognize, understand, and prevent plant diseases, and to whom the elementary course in plant pathology is a necessary part of the background for useful work in agriculture. Some knowledge of the principles underlying the science of plant pathology is indispensable for an understanding of the behaviour of plant pathogens and the results of their activities, and to enable the student to adapt his basic training to new plant disease situations with which he may be faced.
