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 



Agricultural Experiment Station 



AND 



]. G. HALL, M.A. 



Assistant in Vegetable Pathology in the North Carolina 

 Agricultural Experiment Station 



Cloth, Illustrated, 12mo., 523pp., Price, $2.00 net; by mail, $2.19 



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 pecul- 

 iarities, 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. 



: How to Recognize and Control Them 



BY 



WALTER C. O'KANE 



Entomologist of the New Hampshire Experiment Station, and 

 Professor of Economic Entomology in New Hampshire College 



Decorated Cloth, Over 600 Photographic Illustrations 



$2.00 net; postpaid $2.17 



"This is, in short, a book in which others beside agriculturists will find 

 something of practical interest. The illustrations deserve special mention. 

 They are all originals, each subject being presented in its natural size and 

 enlarged many times." New York Tribune. 



"After chapters devoted to the anatomy and physiology of insects, and 

 to the means commonly used for protection of trees and plants, he devotes 

 the remainder to individual pests, giving descriptions, and best means for 

 extermination. ... It is most beautifully illustrated, free from unnecessary 

 technicalities, and very practical." Chicago Evening Post. 



THE MACMILLAN COMPANY 



Publishers 64-66 Fifth Avenue New York 



