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KMID : 0903520040470030339
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
2004 Volume.47 No. 3 p.339 ~ p.343
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In Vivo Antifungal Activities of Surfactants against Tomato Late Blight, Red Pepper Blight, and Cucumber Downy Mildew
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Choi Kyung-Ja
Yu Ju-Hyun
Jang Kyoung-Soo
Kim Heung-Tae
Kim JIn-Chul
Jo Kwang-Yeon
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Abstract
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Anionic surfactants such as sodium dioctyl sulfosuccinate (SDSS) and sodium dodecylbenzene sulfonate (NaDBS) and a nonionic surfactant, polyoxyethylene oleyl ether (OE-7) were tested for their protective, curative, and persistent activities on tomato late blight (TLB, Phytophthora infestans), red pepper blight (RPB, P. capsici), and cucumber downy mildew (CDM, Pseudoperonospora cubensis). They exhibited a strong protective activity on TLB, RPB, and CDM. Among them, NaDBS (500 μg/ml) showed the most in vivo antifungal activities(1-day protective activity) with control values of 99%, 100%, and 85% against TLB, RPB, and CDM, respectively. However, the three surfactants represented a weak disease controlling efficacy on TLB, RPD, and CDM in a 1-day curative application. SDSS and NaDBS exhibited a good persistent activities on TLB and RPB. Especially, NaDBS, at 500 μg/ml, showed control values of more than 88% on TLB and RPB in a 7-day protective application. The results indicate SDSS and NaDBS have a potential for the control of TLB, RPB, and CDM in the fields.
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KEYWORD
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surfactant, antifungal activity, Phytophthora infestans, Phytophthora capsici, Pseudoperonospora cubensis
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