ON PESTS GENERALLY. 



III3 



difficulty, seeing how readily and over what a distance spores 

 may be carried. 



The subject of Plant Diseases is one of such absorbing interest 

 and practical value to the gardener that in these exacting days 

 he cannot afford to remain ignorant of at least the chief diseases 

 affecting his crops. So vast a subject, of course, could only be 

 adequately treated in a decent-sized volume, and those who 

 would pursue the subject further than is possible here, should 

 obtain Prof. Marshall Ward's "Diseases of Plants,'"' Massie's 

 "A Textbook of Plant Diseases," Lodeman's "The Spraying of 

 Plants," with, if possible, Tuboeuf's " Diseases of Plants 

 Induced by Cryptogamous Parasites," translated by Dr. W. G. 

 Smith; and Hartig's "Diseases of Trees," translated by Prof. 

 W. Somerville. 



Eyed Hawk-moth. 



