Study on the Control of Leaf Mold, Powdery Mildew and Gray Mold for Organic Tomato Cultivation
2012
Hong, S.J., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Park, J.H., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Kim, Y.K., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Jee, H.J., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Han, E.J., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Shim, C.K., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Kim, M.J., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Kim, J.H., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Kim, S.H., Jeju Special Self-Governing Province Agricultural Research and Extension Services, Jeju, Republic of Korea
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 2~7℃, 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.
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