- The P. sojae in Heilongjiang had pathogenicity to some main soybean cultivars in Heilongjiang, but no pathogenicity to international standard differential cultivars.
- Urediospores of patents culture, predominant race CY17-5 and CY31-3 were treatedby EMS, induce mutant were screened on the Chinese differential cultivars and thenear-isogenic lines (NILs) of rust.
17M2对维尔发生了毒性突变； 17M3 对南大 2419 发生了毒性突变；
- Golden Delicious is a very fruitful cultivar.
- It is best to choose a slow-growing cultivar.
- These pathotypes belonged to ZB (46.15%), ZA (30.76%), ZC (13.46%), ZG (7.69%) and ZH (1.92%) groups. Isolates from the same site showed different pathogenic reactions to the seven Chinese differentials cultivars.