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Control Effect on Dollar Spot Disease Caused by Sclerotinia homoeocarpa under Different Application Rates and Intervals with Two Mixed Fungicides

혼용된 2종의 살균제 살포 농도 및 간격에 따른 잔디 동전마름병 방제효과

  • Chang, Seog-Won (Department of Golf Course Management, Korea Golf University) ;
  • Jung, Suk-Woo (Department of Golf Course Management, Korea Golf University) ;
  • Kim, Sehun (Department of Golf Course Management, Korea Golf University) ;
  • Park, Jong-Hyun (Department of Golf Course Management, Korea Golf University) ;
  • Lee, Ji-Young (Division of Golf Course Management, Park Vally Golf Course)
  • 장석원 (한국골프대학 골프코스매니지먼트과) ;
  • 정석우 (한국골프대학 골프코스매니지먼트과) ;
  • 김세훈 (한국골프대학 골프코스매니지먼트과) ;
  • 박종현 (한국골프대학 골프코스매니지먼트과) ;
  • 이지영 (파크밸리 골프클럽 코스관리부)
  • Received : 2013.10.09
  • Accepted : 2013.12.02
  • Published : 2013.12.31

Abstract

Dollar spot caused by Sclerotinia homoeocarpa F.T. Benn. is a common and economically important turfgrass disease in South Korea. Fungicides mixture (propiconazole 25% + boscalid 47%) treatments, showing synergistic interaction, with three application rates (low: 50.3 ml $10a^{-1}$ and 97.5 g $10a^{-1}$, intermediate: 67.0 ml $10a^{-1}$ and 130.0 g $10a^{-1}$, and high: 100.5 ml $10a^{-1}$ and 195.0 g $10a^{-1}$) and two application intervals (10 and 15 days) were evaluated for control of dollar spot in creeping bentgrass golf course putting green. In both nontreated plots of field A and B, the disease has severed as 48.3 and 60.0% after the pathogen inoculation. Two fungicide mixture treatments showed significantly higher the disease control effect than a single fungicide treatment (propiconazole). Field A which showed more the disease severity but the fungicide still showed acceptable level of the disease efficacy (89.0%), significant differences in control value were not detected among treatments. The results suggest that the lower application rate of two fungicides mixture treatments may reduce the dollar spot disease severity in creeping bentgrass golf course putting green.

Sclerotinia homoeocarpa F.T. Bennett에 의한 동전마름병은 우리나라 골프장에서 지역에 관계없이 일반적이며 경제적으로 가장 중요한 잔디 병 중 하나이다. 크리핑벤트그래스로 조성된 골프장 그린에서 propiconazole과 boscalid를 혼합제로 하여 방제효과를 평가하였다. 혼합제의 약량은 기준량과 기준량의 1/2량, 2/3량으로 하였고, 살포간격은 각각 10일과 15일 간격으로 3회 처리하였다. 동전마름병은 2개 포장의 무처리구에서 각각 반복별 평균 48.3, 60.0%의 발생을 보였다. 각 처리구는 1개의 처리구(기준량의 1/2 처리구로 15일 간격 살포)를 제외하고 처리별 통계적 유의성은 없었다. 따라서 현장에서 농약회사에서 추천하는 기준량의 농도보다 낮은 농도(기준량의 2/3 및 1/2 농도)로 15일 간격으로 살포하게 될 경우 기준량에 준하는 약효를 얻을 수 있으므로 살포 농약량, 인력, 병원균의 약제 저항성 등을 낮추는 효과를 보일 것으로 예상된다.

Keywords

References

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