STUDIES ON CLUBROOT OF 

 CRUCIFEROUS PLANTS 



A THESIS 



PRESENTED TO THE FACULTY OF THE GRADUATE SCHOOL 

 OF CORNELL UNIVERSITY FOR THE DEGREE OF 



DOCTOR OF PHILOSOPHY 



BY 



CHARLES CHUPP 



Published as N. Y. (Cornell) Agr. Exp. Sta. Bui. 387, 1917. 



