CHAPTER IX. 



PHYTOPATHOLOCxY. DERIVATION AND 

 MEANING. 



History. Refere?ices in the Bible Greeks and Romans 

 Shakespeare Rouen taw Superstitions Malpighi 

 and Grew Hales Unger Berkeley De Bary, 

 etc. Physiology and Biology Diagnosis Etiology 

 Therapeutics. Study of causes. 



Phytopathology, from Greek words which 

 signify to treat of diseases of plants, comprises 

 what is known of the symptoms, course, and 

 causes of the diseases which threaten the lives of 

 plants, or bring about injuries and abnormalities 

 of structure. As a distinct and systematised 

 branch of botany it is a modern study, the history 

 of which only dates from about 1850, though the 

 subject had been treated more or less disjointedly 

 by several authors during the preceding century, 

 and isolated records of diseased crops, fruit-trees, 

 etc., exist far back in the history of Europe. The 

 existence of mildews and blights on cereals indeed 



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