Effects of mixing and reciprocal inoculation with compatible and incompatible races of Pyricularia oryzae on the enlargement of disease lesions of rice blast

친화성 및 비친화성균계의 혼합 및 전후접종이 벼 도열병의 병반확대에 미치는 영향

  • Park Seur Kee (Dept. of Agricultural Biology, College of Agri. Chonnam National Univ.) ;
  • Kim Ki Chung (Dept. of Agricultural Biology, College of Agri. Chonnam National Univ.)
  • 박서기 (전남대학교 농과대학 농생물학과) ;
  • 김기청 (전남대학교 농과대학 농생물학과)
  • Published : 1983.12.01

Abstract

Effect on blast lesion development was investigated in rice cultivar Milyang 23 and Jinheung using two races of Pyricularia oryzae compatible or incompatible to each of two rice cultivars. Discase lesions were measured in rice when inoculated with inoculum mixed with compatible and incompatible races, inoculated with a compatible race following with an incompatible race and vice versa. Lesions were smaller when rice was incoulated with an incompatible race and then inoculated with a compatible race than those inoculated in the reverse way both at the inoculated site and at 3cm-upper part from inoculated spot. The results suggested that induced resistance might play a role in suppression of lesion development although such an effect appeared to be influenced by heavy application of nitrogen fertilizer.

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