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http://dx.doi.org/10.5423/RPD.2003.9.4.183

Assessments of Yield and Quality of Rice Affected by Rice Panicle Blast  

Shim, Hong-Sik (Plant Pathology Division, National Institute of Agricultural Science &)
Kim, Yong-Ki (Technology)
Hong, Sung-Jun (Plant Pathology Division, National Institute of Agricultural Science &)
Han, Seong-Sook (Technology)
Sung, Jae-Mo (Plant Pathology Division, National Institute of Agricultural Science &)
Publication Information
Research in Plant Disease / v.9, no.4, 2003 , pp. 183-188 More about this Journal
Abstract
Correlation between the rice panicle blast and the rice quality and yield was evaluated in field experiments. Results showed that there were high positive correlations between the disease incidence and the rice yield and quality. The correlation coefficients between the disease incidence and the yield of Jinmibyeo, an early maturing cultivar and Juanbyeo, an middle maturing cultivar were $R^2$=0.6518 and $R^2$=0.7977, respectively. As the disease incidence increased weight of 1,000 grains of the two cultivars decreased showing coefficients $R^2$=0.6848 and $R^2$=0.7841, respectively. Percentage of matured grains in healthy plots were 95 and 98%, however, as the disease incidence increased percentage of matured rice grains decreased showing $R^2$=0.4745 in Jinmibyeo and $R^2$=0.703 in Juanbyeo. As the disease increased, rate of the damaged rice also increased, showing $R^2$=0.6607 in Jinmibyeo and $R^2$=0.6706 in Juanbyeo, respectively.
Keywords
panicle blast; rice quality; yield loss; grain filling; 1,000 grains weight;
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