THE FUNGI WHICH CAUSE 

 PLANT DISEASE 



BY 



F. L. STEVENS, Ph. D. 



PROFESSOR OP VEGETABIiE PATHOLOGY AND DEAN, COLLEGE OP 



AGRICULTURE AND MECHANIC ARTS, MAYAGUEZ, PORTO 



RICO. FORMERLY OF THE NORTH CAROLINA 



COLLEGE OP AGRICULTURE ALSO FORMERLY 



PRESIDENT OP THE AMERICAN PHY- 



TOPATHOLOQICAL SOCIETY 



THE MACMILLAN COMPANY 

 1913 



All Ttghtg reserved 



