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http://dx.doi.org/10.5423/RPD.2006.12.1.051

Control of Powdery Mildew by Garlic Oil in Cucumber and Tomato  

Seo Sang-Tae (Dept. of Horticultural Environment, National Horticultural Research Institute, Rural Development Administration)
Lee Jung-Sup (Dept. of Horticultural Environment, National Horticultural Research Institute, Rural Development Administration)
Park Jong-Han (Dept. of Horticultural Environment, National Horticultural Research Institute, Rural Development Administration)
Han Kyoung-Suk (Dept. of Horticultural Environment, National Horticultural Research Institute, Rural Development Administration)
Jang Han-Ik (Dept. of Horticultural Environment, National Horticultural Research Institute, Rural Development Administration)
Publication Information
Research in Plant Disease / v.12, no.1, 2006 , pp. 51-54 More about this Journal
Abstract
The effectiveness of four plant oils (garlic, ginger, cinnamon and lemongrass) against a range of plant pathogenic organisms was tested in vitro. Of the four oils, two oils (garlic and cinnamon) showed relatively good antimicrobial activities. Activity of garlic oil was shown against the plant pathogenic bacteria Agrobacterium tumefaciens, Ewinia carotovora, Ralstonia solanacearum, Xanthomonas campestris, and the fungi Phytophthora infestans, Fusarium oxysporum, Collectotricum sp., whereas Acidovorax avenae and Pythium sp. showed the resistance towards garlic oil. Results from the planta bioassays under greenhouse conditions indicated that garlic oil significantly reduced the cucumber powdery mildew (Sphaerotheca fusca) and tomato powdery mildew (Erysiphe cichoracearum) showing control value 70.0-74.6% and 71.2%, respectively.
Keywords
Antimicrobial activity; Garlic oil; Powdery mildew;
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