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Virulence testing on the five different Ht genes by designating physiological races of Exserohilum turcium.
| Race | Response |
||||
| A619 | A619Ht1 | A619Ht2 | A619Ht3 | A619HtN | |
| 1 | S | S | R | R | R |
| 2 | S | R | S | R | R |
| 3 | S | R | R | S | R |
| 123N | S | S | S | S | S |
R: resistant, no necrosis, or chlorotic lesions surrounded by chlorosis; S: susceptible, necrotic lesions without chlorotic border.
