Research in Plant Disease 2012;18(1):29-34.
Published online March 30, 2012.
박과작물 주요 품종의 흰가루병 및 뿌리혹선충병 저항성 평가
김성현 ( Sung Heun Kim ) , 신지은 ( Ji Eun Shin ) , 이경준 ( Kyung Jun Lee ) , 서생군 ( Sheng Jun Xu ) , 김병섭 ( Byung-sup Kim )
 
Evaluation of Disease Resistance of Cucurbit Cultivars to Powdery Mildew and Root-Knot Nematode
Sung Heun Kim, Ji Eun Shin, Kyung Jun Lee, Sheng Jun Xu and Byung-Sup Kim*
Department of Plant Science, Gangneung-Wonju National University, Gangneung 210-702, Korea
Received: February 03, 2012   Revised: March 13, 2012   Accepted: March 19, 2012
Abstract
Powdery mildew and root-knot nematode are very important diseases occurred in cucurbits. This study was conducted to evaluate the resistance of commercial cucurbit cultivars (21 cultivars of cucumber, 9 cultivars of watermelon, 7 cultivars of oriental melon, and 2 cultivars of melon) to powdery mildew and root-knot nematode. At 60 days after transplanting, disease severity of powdery mildew of commercial cucurbit cultivars was investigated. Two cucumber cultivars, ‘Gangryeogsamcheok’ and ‘Sunhobaegchimdadagi’ were moderately resistant but the rest of cucumber cultivars were susceptible to powdery mildew. All examined watermelon and oriental melon cultivars were susceptible to powdery mildew, while two melon cultivars (‘PMR Turbo’ and ‘PMR Victory’) were resistant. At 45 days after inoculation of seedlings, disease severity of root-knot nematode of commercial cucurbit cultivars were investigated. One cucumber cultivars, ‘Baegbongdadagi’ was moderately resistant and the others were susceptible to root-knot nematode. In case of watermelon, ‘Dalgonakkul’ was resistant and the others were moderately resistant or susceptible to root-knot nematode. All examined oriental melon and melon cultivars were susceptible to root-knot nematode. On these results, we recommend that resistant cultivars to powdery mildew and/or root-knot nematode will be more suitable in cultivation of cucurbits for organic farming.
Key Words: Meloidogyne incognita, Organic farming, Sphaerotheca fusca


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