RESEARCH BULLETIN NO. 22 
THE UNIVERSITY OF NEBRASKA 
BULLETIN 
OP THE 
AGRICULTURAL EXPERIMENT STATION 
OF 
NEBRASKA 
A STUDY OFg THE ENVIRONMENTAL CONDI- 
TIONS INFLUENCING THE DEVELOPMENT 
OF STEM RUST IN THE ABSENCE OF 
AN ALTERNATE HOST 
l. THE VIABILITY OF THE UREDINIOSPORES OF PUCCINIA 
GRAMINIS TRITICI FORM III 
George L. Peltier 
ACCEPTED FOR PUBLICATION JULY 1, 1922 
DISTRIBUTED SEPTEMBER 1, 1922 
LINCOLN, NEBRASKA 
U. S. A. 
