Effect of agrochemicals on mycelial growth and spore germination of a hyperparasite, Ampelomyces quisqualis 94013 for controlling cucumber powdery mildew

농약이 오이흰가루병 방제용 중복기생균 Ampelomyces quisqualis 94013의 균사생장 및 포자발아에 미치는 영향

  • Lee, Sang-Yeob (Division of Plant Pathology, National Institute of Agricultural Science and Technology, Rural Development Administration) ;
  • Lee, Sang-Bum (Research Policy Planning Division, Research Management Bureau, Rural Development Administration) ;
  • Kim, Yong-Ki (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) ;
  • 이상범 (농촌진흥청 연구개발국 연구정책과) ;
  • 김용기 (농촌진흥청 농업과학기술원 식물병리과) ;
  • 김홍기 (충남대학교 농과대학 농생물학과)
  • Published : 2004.03.30

Abstract

A promising hyperparasite, Ampelomyces quisqualis 94013(AQ94013) was selected as a biological control agent to cucumber powdery mildew caused by Sphaerotheca fusca. Effect of agrochemicals on mycelium growth and spore germination of AQ94013 and effect of spread stickers on hyperparasitical activity of AQ94013 to powdery mildew pathogen were evaluated. Finally it was confirmed that mycelial growth and spore germination of AQ94013 on potato dextrose agar amended with two fungicides for controlling powdery mildew, triadimefon and pyrazophos; five fungicides for controlling downy mildew, dimethomorph, kasugamycin+copper oxychloride, dichlofluanid+copper oxychloride and tribasic copper sulfate; three fungicides for controlling gray mold, iprodione, vinclozolin and procymidone; and six insecticides immidacloprid, teflubenzuron, bifenthrin, ethofenprox, deltamethrin and phenthoate were slightly reduced. Addition of mineral oil in the spore suspension of AQ94013 enhanced 7.9% control value to cucumber powdery mildew.

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