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http://dx.doi.org/10.5423/RPD.2004.10.4.341

Occurrence Tendency and Decrease of Fruits Brix According to Increasing Grapevine Leaf Spot Disease Caused by Pseudocercospora vitis  

Park, Jong-Han (Horticultural Environment Division, National Horticultural Research Institute)
Han, Kyung-Sook (Horticultural Environment Division, National Horticultural Research Institute)
Lee, Jung-Sup (Horticultural Environment Division, National Horticultural Research Institute)
Seo, Sang-Tae (Horticultural Environment Division, National Horticultural Research Institute)
Jang, Han-Ik (Horticultural Environment Division, National Horticultural Research Institute)
Kim, Heung-Tae (Plant Medicine Division, Chungbuk Natl. Univ.)
Publication Information
Research in Plant Disease / v.10, no.4, 2004 , pp. 341-344 More about this Journal
Abstract
Grapevine leaf spot caused by Pseudocercospora vitis also called leaf Isariopsis spot which is one of the most important disease in Korea. Spots on the leaves are irregular to angular. They are brown, measure 2${\sim}$20 mm in diameter. Campbell Early, the major grape cultivar in Korea, is very susceptible to this disease. Leaf spot of grape is outbreak about 95% in ratio of diseased leaves according to the areas and management state of orchards in Korea. The diseased grapevines have some difficulty in raise of the trees by early defoliation and decrease the quality of fruits by disadvantage of assimilation products accumulation. Severe outbreak of the grapevine leaf spot is one of the factors that decrease of sugar content of the fruits about 20%. The strong negative correlation was observed between disease increase of grapevine and decrease of sugar content of the fruits. The correlation equation between relative sugar content of fruits and accumulated percentage of diseased leaves was Y = 0.0009$X^2$ - 0.3717X + 116.45($r^2$= 0.98).
Keywords
Grapevine; Leaf spot; Pseudocercospora vitis; Sugar content;
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Times Cited By KSCI : 1  (Citation Analysis)
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