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http://dx.doi.org/10.5423/RPD.2012.18.2.080

Comparative Analysis between Healthy and Powdery Mildew-infected Plants of Strawberry Cultivar Seolhyang  

Nam, Myeong-Hyeon (Nonsan Strawberry Experiment Station, Chungnam ARES)
Jeon, Yi-Nae (Department of Horticulture, Kongju National University)
Lee, Hee-Chul (Nonsan Strawberry Experiment Station, Chungnam ARES)
Lee, He-Duck (Nonsan Strawberry Experiment Station, Chungnam ARES)
Kang, Hee-Kyoung (Department of Horticulture, Kongju National University)
Publication Information
Research in Plant Disease / v.18, no.2, 2012 , pp. 80-85 More about this Journal
Abstract
We examined the incidence of powdery mildew in strawberry cv. Seolhyang plants, and performed a comparative analysis on the temperature, photosynthesis rate, and nutrient content of healthy and powdery mildew-infected plants. Powdery mildew first infected the fruit of the strawberries in mid-January, and the disease severity increased in both fruits and leaves during the late harvest season. The rate of photosynthesis and leaf temperatures of healthy plants were higher than those of powdery mildew-infected leaves and significantly decreased with an increase in the disease severity. The healthy and powdery mildew-infected plants in the soil analysis were not significantly different in chemical compositions. The leaves of the healthy plants contained lower potassium and higher manganese and chlorophyll concentrations than the powdery mildew-infected plants. In particular, manganese was significantly higher in healthy leaves than in infected leaves. Therefore, the concentrations of potassium, manganese and chlorophyll in strawberry leaves may be an important factor for disease suppression.
Keywords
Healthy plant; Manganese; Seolhyang;
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