Historical 9 



1906 The passage by Congress of the Adams Act. 



1906 The introduction of the use of Hme-sulfur. Cordle}^ 



1907 EstabUshment of the first university department of plant 



pathology. Cornell. 

 1909 The organization of the American Phytopathological Society. 

 1912 The passage by Congress of the Plant Quarantine act. 



