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; 'r-.^J I 
• - >’;-*■* 
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J'MIT> 1921 I 
Vbl* XXI 
JULY 1,1© 
' , - CONTENTS • - ' . ' • 
Study of the Relation of the Length of Kernel to the Yield 
' of Corn (Zea mays indentata) - - - * - 
; C. C. CUNNINGHAM 
•\ '' ^ (Contribution from Kansas Agricultural Experiment Station) 
427 
Distinguishing Characters of the Larval Stages of the Ox- 
Warbles Hypoderma bovisahd Hypoderma lineatum, 
with Description of a New Larval Stage - - - 439 
E. W. LAAKE 
(Contribution from Bureau ol Entomology) , 
Pathogenicity of Corticium vagum on the Potato as 
. Affected by Soil Temperature - - : - - - 
E. lr. RICHARDS 
(Contribution trom Utah Agricultural Experiment Station) 
Further Experiments in Field Technic in Plot Tests - - 
A. C. ARNY 
(Contribution from Minnesota Agricultural Experiment Station) 
Relation of Horse Nettle (Solanum carolinense) to Leaf- 
spot of Tomato (Septoria lycopersici) - - 
FRED J. PRITCHARD and W. S. PORTE 
(Contribution from Bureau o f Plant Industry) 
459 
483 
501 
PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE, 
WITH THE COOPERATION OF THE ASSOCIATION OF 
LAND-GRANT COLLEGES 
WASHINGTON, D. C. 
Washington t government printing office : tm 
