Vol. VI JUNK 5, 1916 No. lO 



JOURNAL OF 



AGRIGUIvTURAL 

 RESEARCH 



CONTENTS 



Page 



Silver-Scurf of the Irish Potato Caused by Spondylocladium 

 atrovirens --------- 339 



EUGENE S. SCHDLTZ 



Woolly Pear Aphis - - - - - - - '- 351 



A. C. BAKER and W. M. DAVIDSON 



Pathological Histology of Strawberries Affected by Species 

 of Botrytis and Rhizopus - -- - - - 361 



NEH E. STEVENS 



Life Histories and Methods of Rearing H^essian-Fly Para- 

 sites - - - - -- -.J,. 367 



C. M. PACKARD 



DEPARTMENT OF AGRIGUITURE 



AX^SHTNGTON, B.C. 



WASHINQTON : GOVERNMrNT PRINTING OFFICE : 181* 



