Research in Plant Disease (식물병연구)

The Korean Society of Plant Pathology (한국식물병리학회)
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Biological Control of Botrytis Leaf Blight of Lily and Botrytis Gray Mold of Cucumber by Ulocladium atrum

Ulocladium atrum을 이용한 백합 잎마름병 및 오이 잿빛곰팡이병의 생물학적 방제

  • Lee, Nam-Young (Department of Agricultural Biology, College of Agriculture and Life Sciences, Chungnam National University) ;
  • Kwon, Eun-Mi (Department of Agricultural Biology, College of Agriculture and Life Sciences, Chungnam National University) ;
  • Kim, Jin-Cheol (Biological Function Research Team, Korea Research Institute of Chemical Technology) ;
  • Yu, Seung-Hun (Department of Agricultural Biology, College of Agriculture and Life Sciences, Chungnam National University)
  • 이남영 (충남대학교 농업생명과학대학 농생물학과) ;
  • 권은미 (충남대학교 농업생명과학대학 농생물학과) ;
  • 김진철 (한국화학연구원 생물기능연구팀) ;
  • 유승헌 (충남대학교 농업생명과학대학 농생물학과)
  • Published : 2004.12.01
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Abstract

This study was conducted to investigate the effect of U. atrum treatment on control of Botrytis leaf blight of lily and Botrytis gray mold of cucumber, and to evaluate the U. atrum as the biological control agent of Botrytis diseases. The antagonistic isolates CNU 9037 and CNU 9054 isolated from tomato leaves were identified as Ulocladium atrum Preuss based on morphological characteristics. This is the first record of U. atrum in Korea. In bioassays on dead leaves of tomato and cucumber, treatment of U. atrum colonized the dead leaves and suppressed sporulation of Botrytis as compared with the untreated control. The suppression of spoulation of Botrytis on dead leaf segments by U. atrum was higher when U. atrum was treated before Botrytis was treated. The effect of treatments with conidial suspension of U. atrum on leaf blight of lily and gray mold of cucumber caused by Botrytis elliptica and B. cinerea, respectively, was investigated under greenhouse conditions. Spraying U. atrum ($1{\times}10^6$ conidia per ml) at intervals of 1 week for three times resulted in a significant reduction of natural infections of lily leaves caused by B. elliptica. Protective value of U. atrum treatment was higher than that of the fungicide (procymidone) treatment. Spraying U. atrum also resulted in a significant reduction of cucumber gray mold caused by B. cinerea. Our results show that U. atrum has a potential for biological control against diseases caused by Botrytis spp, in lily and cucumber.

본 연구는 부생성 균류인 Ulocladium atrum을 이용하여 Botrytis spp.에 의한 백합 잎마름병 및 오이 잿빛곰팡이병의 방제효과를 조사하고 그 작용특성을 규명함으로서 U. atrum의 생물학적 방제제로서의 이용 가능성을 평가하기 위해 실시하였다. 토마토 잎의 표면과 조직 속에서 분리한 Ulocladium sp. CNU 9037과 CNU 9054 균주는 형태적 특징에 의하여 U. atrum로 동정되었으며 이것이 U. atrum의 국내 최초의 보고이다. 토마토 및 오이의 고사된 잎을 이용하여 U. atrum의 Botrytis spp. 포자형성억제력을 실내검정으로 조사하였던 바, U. atrum은 고사된 잎 절편에서 Botrytis의 포자형성을 효과적으로 억제하였다. Botrytis의 포자형성억제력은 U. atrum을 Botrytis보다 먼저 처리했을 경우 효과가 높았다. 백합 잎마름병 방제를 위한 포장(온실)실험 결과 U. atrum CNU 9037 균주의 포자현탁액 처리는 백합 잎마름병을 효과적으로 억제하였으며 방제가는 70%, 77%로 procymidone 약제 처리구의 방제가(58%)보다 우수하였다. U. atrum(CNU 9037, CNU 9054) 포자현탁액처리는 오이 잿빛곰팡이병도 효과적으로 억제하였으며, 그 방제가는 66${\sim}$71%였다. 본 연구의 결과는 U. atrum 균주가 오이, 백합의 Botrytis병의 생물학적 방제제로서 개발 가능성이 있음을 나타낸다

Keywords

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