CT)XT1:XTS. 



Paga. 



Introduction 7 



Specialized forms of cereal rusts 9 



Comiuou uomeuclature of grain rusts 11 



The Depaitmcnt's work on grain rusts 11 



General oliservatiouson cereal rusts In dilVerent States 13 



New York 13 



Pennsylvania 13 



Maryland 13 



North Carolina. 13 



Ohio 14 



Michigan 14 



Indiana 14 



Wisconsin 14 



Illinois 15 



Kentucky 15 



Tennessee 15 



Georgia 15 



Minnesota 16 



Iowa 16 



Missouri 16 



North Dakota 16 



South Dakota 16 



Nebraska 17 



Kansas 17 



Texas 17 



Washington and Oregon 18 



California 18 



Montana, Idaho, and Utah 18 



Virginia 18 



Oklahoma 18 



Losses caused by rust 18 



Orange leaf rust of wheat 19 



Physiological relations 19 



Occurrence and distribution 21 



Wintering of the uredo 21 



Liability of different varieties to this rust 23 



Characteristics of wheats resistant to orange leaf rust 32 



Eust-free varieties for the United States 39 



Damage 40 



Orange leaf rust of rye • 42 



Physiological relations 42 



Occurrence and distribution 44 



Wintering of the uredo 44 



Liability of different varieties to this rust 45 



Damage 45 



5 



