Use of Pythium myriotylum MD2 to Control Weeds in Rice Paddy Fields

물달개비 병원균인 Pythium myriotylum MD2를 이용한 논잡초 방제

  • Choi, Gyung-Ja (Screening Division, Korea Research Institute of Chemical Technology) ;
  • Hwang, In-Taek (Screening Division, Korea Research Institute of Chemical Technology) ;
  • Choi, Yong-Ho (Screening Division, Korea Research Institute of Chemical Technology) ;
  • Lee, Byung-Hoi (Screening Division, Korea Research Institute of Chemical Technology) ;
  • Kim, Heung-Tae (Screening Division, Korea Research Institute of Chemical Technology) ;
  • Kim, Jin-Cheol (Screening Division, Korea Research Institute of Chemical Technology) ;
  • Lee, Seon-Woo (Screening Division, Korea Research Institute of Chemical Technology) ;
  • Kim, Jin-Won ;
  • Cho, Kwang-Yun (Screening Division, Korea Research Institute of Chemical Technology)
  • 최경자 (한국화학연구소 스크리닝연구부) ;
  • 황인택 (한국화학연구소 스크리닝연구부) ;
  • 최용호 (한국화학연구소 스크리닝연구부) ;
  • 이병회 (한국화학연구소 스크리닝연구부) ;
  • 김흥태 (한국화학연구소 스크리닝연구부) ;
  • 김진철 (한국화학연구소 스크리닝연구부) ;
  • 이선우 (한국화학연구소 스크리닝연구부) ;
  • 김진원 (서울시립대학 환경원예학과) ;
  • 조광연 (한국화학연구소 스크리닝연구부)
  • Published : 2001.12.31

Abstract

An isolate of the indigenous fungus Pythium myriotylum was isolated from Monochoria vaginalis in Yusung, Korea in year 2000 and evaluated potential as a biocontrol agent in laboratory and greenhouse. P. myriotylum MD2 grew in a wide range of temperature regimes and the optimal growth temperature was $35^{\circ}C$. The fungus was highly pathogenic to Monochoria vaginalis at 30 to $35^{\circ}C$. Several weeds such as Rotala, indica, Lindernia procumbens, Ludwigia prostrata, Cyperus difformis, Scirpus juncoides, Aneilema keisak were also susceptible to the fungus, but Echinochloa crus-galli was not. The fungus affected the growth of rice seed germinated, but not to rice seedlings of 1- to 3-leaf stage. A total of 12 rice cultivars (3- to 4-leaf stage) tested showed no disease symptoms when inoculated with the fungus. Eleven crops, including Chinese cabbage, corn, soybean except wheat were immune to the infection of the fungi. These data suggest that P. myriotylum MD2 has a potential as a mycoherbicide to control weeds in paddy fields.

Keywords

Pythium myriotylum