Abstract:

Thirty inbred lines such as A632, B37, B73, B68, C103 and Va26 from the inbred collection at the University of Illinois  were used to determine physiological races of Exserohilum turcicum in the field. Twenty\|one inbred lines from the inbred collection were selected to dete
rmine physiological differentiation of E.turcicum effectively in China.  Thirty\|two single conidial isolates of E.turcicum were collected th
roughout 15 farming areas of Jilin Province. All the 32 isolates were race zero. There was no physiological differentiation of the pathogen.

Key words: inbred lines, Exserohilum turcicum, physiological races, identification