Korean Journal of Organic Agriculture (한국유기농업학회지)

Korean Association of Organic Agriculture (한국유기농업학회)
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Study on the Control of Leaf Mold, Powdery Mildew and Gray Mold for Organic Tomato Cultivation

유기농 토마토 재배시 발생하는 잎곰팡이병, 흰가루병, 잿빛곰팡이병의 방제연구

  • 홍성준 (국립농업과학원 유기농업과) ;
  • 박종호 (국립농업과학원 유기농업과) ;
  • 김용기 (국립농업과학원 유기농업과) ;
  • 지형진 (국립농업과학원 유기농업과) ;
  • 한은정 (국립농업과학원 유기농업과) ;
  • 심창기 (국립농업과학원 유기농업과) ;
  • 김민정 (국립농업과학원 유기농업과) ;
  • 김정현 (국립농업과학원 유기농업과) ;
  • 김승현 (제주 동부농업기술센터)
  • Received : 2012.10.11
  • Accepted : 2012.12.21
  • Published : 2012.12.31
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Abstract

Foliar diseases are major constraints to profitable organic tomato production. Especially, powdery mildew, leaf mold and gray mold of tomato occur severely on organic cultured tomatoes in Korea. This study was conducted to develop organic tomato cultivation technology using environmental-friendly disease control methods (resistance cultivar planting, air circulation fan installation, oil-egg yolk mixtures, and microbial agents). When tomatoes were cultivated in plastic film house installed with air circulation fan, daily range of temperature was decreased by $2{\sim}7^{\circ}C$, average relative humidity was decreased by 1~5% compared to those in plastic house without air circulation fan. Consequently, incidence of tomato leaf mold and tomato gray mold was reduced by 55.0% and 24.4%, respectively. Control effect of microbial agents and oil-egg yolk mixtures against major tomato diseases was examined in plastic house. As a result, the control value of microbial agents against tomato gray mold and tomato leaf mold showed at the range of 49.0~55.9 %(gray mold) and 39.2~58.2%(leaf mold), respectively. The control value of oilegg yolk mixtures against tomato powdery mildew showed 97.6%. Fifteen tomato cultivars were evaluated for disease resistance against leaf mold and powdery mildew in organically cultivated tomato field. Among 15 tomato cultivars, seven cultivars including 'Super-top' were found to be high resistant to tomato leaf mold. Also 'Powerking', one of fifteen tomato cultivars, showed to be high resistant to tomato powdery mildew.

유기농 토마토 생산에 있어 지상부 잎에 발생하는 병은 수량을 감소시키는 중요한 요인이다. 특히 흰가루병, 잎곰팡이병, 잿빛곰팡이병이 유기농 토마토 포장에서 심각한 문제가 되고 있다. 본 연구는 저항성 품종, 환기장치, 난황유 및 미생물 농약 등 친환경적인 방제방법을 이용하여 유기농 토마토 생산 기술을 증대시키기 위해서 수행되었다. 시설하우스에 환기장치를 작동시키면 환기장치를 설치하지 않은 하우스에 비해 최고온도와 최저온도의 편차가 $2{\sim}7^{\circ}C$ 줄어들고, 평균상대습도도 1~5% 감소되었다. 그 결과 토마토 잎곰팡이병 발생이 55.0%, 그리고 토마토 잿빛곰팡이병 발생이 24.4% 억제되었다. 미생물 농약 2종을 시설하우스에서 잿빛곰팡이병과 잎곰팡이병을 대상으로 방제시험을 실시한 결과, 잿빛곰팡이병은 49.0~55.9%, 잎곰팡이병은 39.2~58.2%의 방제효과가 있는 것으로 조사되었다. 또한 난황유를 제조하여 흰가루병을 대상으로 시설하우스에서 처리한 결과 97.6%의 우수한 방제효과가 확인되었다. 잎곰팡이병과 흰가루병을 대상으로 병저항성 품종 선발시험을 실시한 결과 15품종 중 슈퍼탑을 포함한 7품종이 잎곰팡이병에 대해 저항성을 가지는 것으로 확인되었으며, 흰가루병의 경우에는 15품종 중 파워킹만이 저항성을 나타내었다.

Keywords

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