PREFACE Vll 



part) ; Scribner, figures 38, 42-44, 50-52, 61-63 ; Seymour, 45, 

 86 ; E. F. Smith, plate VIII ; W. G. Smith, plate XVII ; Soraue^ 

 figures 13, 14; Thaxter, figures 56, 67-69; Tulasne, figure 84; 

 Waite, figure 15 ; Ward, figure 6. 



I have aimed to treat of only the more destructive and 

 wide-spread fungous diseases, especially those for which prac- 

 tical remedies are known ; and have endeavored to give such a 

 concise account of the more important facts concerning these 

 as will enable the cultivator to combat them intelligently. A 

 few of the paragraphs in the following pages have already been 

 printed in my series of articles on Plant Diseases in the National 

 Stockman and the American Agriculturist; and in a few other 

 instances I have drawn upon my previous writings. I desire 

 also to express my obligations to the directors and other offi- 

 cers of a number of experiment stations notably those of 

 Connecticut, Cornell University, Delaware, Kentucky, Massa- 

 chusetts, New York, New Jersey, New Hampshire, Ohio, 

 Rhode Island, and Vermont for the use of plates of illustrations. 



C. M. W. 

 New Hampshire College of Agriculture and Mechanic Arts. 



Durham, January, 1894. 



