Vol. XIII NIAV 6, 1918 No. 6 



JOURNAL OP 



AGRICULTURAL 

 RESEARCH 



CONTENTS 



YeHow-Leafblotch of Alfalfa Caused by the Fimgus Pyre- 



nopeziza medicaginis ____-» 307 



FRED REDEL JONES 

 ( ContribatSon from Bureau of Plant Industry ) 



Ab Undescribed Canker of Poplars and Willows Caused 



by Cytospora chrysospenna - - - - - 331 



W. H. LONG 

 (CoKrfrnmtion from Bureau of Plant loduatty) 



PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICDLTDRE. 



WITH THE COOPERATION OF THE ASSOCIATION OF AMERICAN 



AGRICULTURAL COLLEGES AND EXPERIMENT STATIONS 



WASMINOXON, E). C. 



WAMIMOTOM tttOVtRNMEMT MINTINa OmeC M«lt 



