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http://dx.doi.org/10.5423/RPD.2018.24.1.26

Effect of Nutrition Solution pH and Electrical Conductivity on Fusarium Wilt on Strawberry Plants in Hydroponic Culture  

Nam, Myeong Hyeon (Nonsan Strawberry Experiment Station, Fruit Vegetable Research Institute, Chungnam ARES)
Lee, Hee Chul (Nonsan Strawberry Experiment Station, Fruit Vegetable Research Institute, Chungnam ARES)
Kim, Tae il (Nonsan Strawberry Experiment Station, Fruit Vegetable Research Institute, Chungnam ARES)
Lee, Eun Mo (Nonsan Strawberry Experiment Station, Fruit Vegetable Research Institute, Chungnam ARES)
Yoon, Hae Suk (Horticultural Research Division, Gyeongnam ARES)
Publication Information
Research in Plant Disease / v.24, no.1, 2018 , pp. 26-32 More about this Journal
Abstract
Fusarium wilt on strawberry plants caused by Fusarium oxysporum f. sp. fragariae (Fof) is a major disease in Korea. The prevalence of this disease is increasing, especially in hydroponic cultivation in strawberry field. This study assessed the effect of nutrition solution pH and electrical conductivity (EC) on Fusarium wilt in vitro and in field trials. pH levels of 5.0, 5.5, 6.0, 6.5, 7.0, and 7.5 were assayed in vitro and in field trials. EC levels at 0, 0.5, 0.8, 1.0, and $1.5dS{\cdot}m^{-1}$ were assayed in field trials. Mycelial growth of Fof increased with increasing pH and was highest at $25^{\circ}C$ pH 7 and lowest at $20^{\circ}C$, pH 5.0 in vitro. The incidence of Fusarium wilt was lowest in the pH 6.5 treatment and highest in the pH 5 treatment in field trials. At higher pH levels, the EC decreased in the drain solution and the potassium content of strawberry leaves increased. In the EC assay, the severity of Fusarium wilt and nitrogen content of leaves increased as the EC increased. These results indicate that Fusarium wilt is related to pH and EC in hydroponic culture of strawberry plants.
Keywords
Disease index; Fragaria x ananassa; Nitrogen;
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