박과작물 주요 품종의 흰가루병 및 뿌리혹선충병 저항성 평가

Abstract

Department of Plant Science, Gangneung-Wonju National University, Gangneung 210-702, Korea(Received on February 3, 2012; Revised on March 13, 2012; Accepted on March 19, 2012)Powdery mildew and root-knot nematode are very important diseases occurred in cucurbits. This study wasconducted to evaluate the resistance of commercial cucurbit cultivars (21 cultivars of cucumber, 9 cultivars ofwatermelon, 7 cultivars of oriental melon, and 2 cultivars of melon) to powdery mildew and root-knotnematode. At 60 days after transplanting, disease severity of powdery mildew of commercial cucurbitcultivars was investigated. Two cucumber cultivars, ‘Gangryeogsamcheok’ and ‘Sunhobaegchimdadagi’were moderately resistant but the rest of cucumber cultivars were susceptible to powdery mildew. Allexamined watermelon and oriental melon cultivars were susceptible to powdery mildew, while two meloncultivars (‘PMR Turbo’ and ‘PMR Victory’) were resistant. At 45 days after inoculation of seedlings, diseaseseverity 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 ofwatermelon, ‘Dalgonakkul’ was resistant and the others were moderately resistant or susceptible to root-knotnematode. All examined oriental melon and melon cultivars were susceptible to root-knot nematode. On theseresults, we recommend that resistant cultivars to powdery mildew and/or root-knot nematode will be moresuitable in cultivation of cucurbits for organic farming.Keywords : Meloidogyne incognita, Organic farming, Sphaerotheca fusca