Diseases of Economic Plants 



By F. L. STEVENS, Ph.D. 

 Professor of Botany and Vegetable Pathology of the North Carolina 

 College of Agriculture and Mechanic Arts and Biologist of the Agri- 

 cultural Experiment Station 



AND 



J. G. HALL, M.A. 



Awistant in Vegetable Pathology in the North Carolina Agricultural 



Experiment Station 



Clolh, iUuitrated, ISmo, BS3 pp., S2.00 net; by mail, $Z.19 



Students of Plant Diseases are naturally divided into two categories. 

 First: Those who wish to recognize and treat diseases, without the bur- 

 den of long study as to their causes; Second: Those who desire to study 

 the etiology of diseases, and to become familiar with the parasites which 

 are often their cause. 



The present book is designed to meet the needs of the first of these 

 two classes of readers, and particularly for such students in the Agri- 

 cultural Colleges and Agricidtural High Schools. It indicates the chief 

 characteristics of the most destructive plant diseases of the United States 

 caused by cr3rptogamic parasites, fungi, bacteria, and slime moulds, in 

 such a way that reliable diagnoses may be made, and fully discusses the 

 best methods of prevention or cure for these diseases. 



In this volume only such characters are used as appear to the naked 

 eye or through the aid of a hand lens, and all technical discussion is 

 avoided in so far as is possible. No consideration is given to the causal 

 organism, except as it is conspicuous enough to be of service in diagnosis, 

 or exhibits peculiarities, knowledge of which may be of use in prophylaxis. 



While, in the main, non-parasitic diseases are not discussed, a few of 

 the most conspicuous of this class are briefly mentioned, as are also 

 diseases caused by the most common parasitic flowering plants. 



A brief statement regarding the nature of bacteria and fungi and the 

 most fundamental facts of Plant Physiology are given in the appendix. 

 Nearly 200 excellent illustrations greatly increase the practical value of 

 the book. 



CONTENTS 



Preface — Introductory — ^Historical — Damage Caused by Plant Dis- 

 eases — Symptoms of Disease — Prevention or Cure of Plant Diseases — 

 Public Plant Sanitation — Fungicides — Spraying Machinery — Cost of 

 Spraying — ^Profits from Spraying — Soil Disinfection — General Diseases — 

 Diseases of Special Crops: Pomaceous Fruits; Drupaceous Fruits; Small 

 Fruits; Tropical Fruits; Vegetable and Field Crops. Cereals: Cereal 

 Smuts, General; Cereal Rusts, General; Anthracnose of Cereals; Special 

 Diseases of Cereals; Forage Crops; Fiber Plants; Trees and Timber: Gen- 

 eral Diseases, Special Hosts; Ornamental Plants — ^Appendix — Index. 



PUBLISHED BY 



THE MACMILLAN COMPANY 



Publishers 64-66 Fifth Avenue New York 



