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Environmental Factors Affecting Parasitism to Cucumber Powdery Mildew Fungus, Sphaerotheca fusca by Ampelomyces quisqualis 94013 and Its Host Range

Ampelomyces quisqualis 94013의 오이 흰가루병균 기생에 영향을 미치는 환경조건과 기주범위

  • Lee, Sang-Yeob (Division of Plant Pathology, National Institute of Agricultural Science and Technology, Rural Development Administration) ;
  • Ryu, Jae-Dang (Division of Plant Pathology, National Institute of Agricultural Science and Technology, Rural Development Administration) ;
  • Kim, Hong-Gi (Department of Agricultural Biology Chungnam National University)
  • 이상엽 (농촌진흥청 농업과학기술원 식물병리과) ;
  • 류재당 (농촌진흥청 농업과학기술원 식물병리과) ;
  • 김홍기 (충남대학교 농업생명과학대학 농생물학과)
  • Published : 2005.12.01

Abstract

An isolate of Ampelomyces quisqualis 94013 was selected as an effective parasite for biological control against cucumber powdery mildew. Temperature range for the parasitism of A. quisqualis 94013 against cucumber powdery mildew was $12\~30^{\circ}C$, and optimal temperature for that $20\~28^{\circ}C$. In $20\~35\%$ humidity of the greenhouse, parasitic ability of A. quisqualis 94013 against Sphaerotheca fusca was not good. Inoculation tests revealed that A. quisqualis 94013 can parasitize on six species of Sphaerotheca in the 12 crops and Ersiphe cichoracerum in tomato. As host rang of A. quisqualis 94013 was broad and it may be used effectively as a biocontrol agent for powdery mildew of 13 crops.

오이 흰가루병균의 생물적 방제제로 선발한 중복기생균 Ampelomyces quisqualis 94013의 오이 흰가루병 균에 대한 기생력을 온도와 습도에 대하여, 그리고 mineral oil 등 10종의 전착제와 혼용하였을 때 기생력 증진효과를 검토하였다. 또한 A. quisqualis 94013균주의 기주범위에 대하여 오이, 호박, 참외, 멜론, 수박, 박, 딸기, 가지, 토마토, 콩, 팥, 장미에 기생하는 흰가루병균 Sphaerotheca속 6종, Erysiphe속 1종에 대하여 조사하였다. 오이 흰가루병균에 대하여 A. quisqualis 94013의 기생이 가능한 온도 범위는 $12\~30^{\circ}C$이고, 기생 최적온도는 $20\~28^{\circ}C$이였다. A. quisqualis 94013균주는 $20\~35\%$의 저습도에서 오이흰가루병균에 대하여 기생력이 저조하였다. 또한, A. quisqualis 94013의 기주범위조사에서 오이, 멜론, 수박, 참외, 박, 딸기, 토마토, 가지, 장미 등 12종의 작물을 침해하는 흰가루병균 Sphaerotheca속 6종, Erysiphe속 1종에 대하여 기생성이 있어 기주특이성이 없는 것으로 나타났다.

Keywords

References

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