8 Diseases of Economic Plants 



Important Events in Plant Disease History 



Ancient. Recognition of the existence of plant diseases in early 



Biblical times. 

 1683 The discovery of bacteria. Loewenhoek. 

 1807 The efficiency of copper against smut spores discussed. 



Prevost. 

 1821 The use of sulfur as a fungicide recommended. Robertson. 



1845 The use of boiled sulfur and lime for mildew advocated. 



1846 The studies of Rev. M. J. Berkeley. 



1853 The beginning of the "Morphology and Physiology of the 



Fungi" and the proof of parasitism of fungi. De Bary. 

 1861 The publication of the first American paper on plant pathology. 



Engelmann. 

 1860-1864 The founding of bacteriology. Pasteur. 

 1864 The proof of alternation of hosts, heteroecism. De Bary. 

 1869 The first university publication in America regarding plant 



pathology. University of Illinois. 

 1873 Plant pathology taught incidentally with botany in America. 



Burrill. 

 1875 Plant pathology first taught as a special subject in America. 



Farlow. 

 1879-1880 Proof of bacterial disease in plants. Burrill. 

 1880 The discovery of the cyclone principle in nozzles. Barnard. 

 1882 The beginning of "Sylloge Fungorum." Saccardo. 



1884 Systematic introduction of plant pathology into American 



Agricultural Experiment Station work. Arthur. 



1885 The announcement of the Bordeaux mixture. Millardet. 



1885 Organization of a Section of Mycology in the Division of 



Botany, United States Department of Agriculture. Lam- 

 son-Scribner. 



1886 Proof that mosaic is infectious. Mayer. 



1887 The hot-water treatment for smut. Jensen. 



1888 The introduction of formalin as a disinfectant. Trillat. 

 1888 Organization of the State Agricultural Experiment Stations. 

 1890 The beginning of pump improvement for spraying. 



1894 Establishment of the fact that biologic races exist. Eriksson. 



