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http://dx.doi.org/10.5423/RPD.2006.12.1.005

Effects of Development Time and Severity of Rice Ear Blight on Rice Yield and Quality  

Shim Hong-Sik (Plant Pathology Div., National Institute of Agricultural Science and Technology, RDA)
Hong Sung-Jun (Plant Enviornment Div., Yeongnam Agricultural Research Institute, NICS, RDA)
Hong Sung-Gi (Plant Pathology Div., National Institute of Agricultural Science and Technology, RDA)
Kim Yong-Ki (Plant Pathology Div., National Institute of Agricultural Science and Technology, RDA)
Ye Wan-Hae (Plant Pathology Div., National Institute of Agricultural Science and Technology, RDA)
Sung Jae-Mo (Division of Biological Environment, Kangwon National University)
Publication Information
Research in Plant Disease / v.12, no.1, 2006 , pp. 5-9 More about this Journal
Abstract
Grain discoloration, caused by several microorganisms, is a minor disease, but it is gaining importance in almost all rice growing areas of the world in recent years. Such grains are of low market value and consumption appeal in addition to their abnormal performance as seed of source of nutrient value. When the casual agents were inoculated on rice plant,'Ilmi-byeo'(at right before heading time and on heading time), the incidence of rice ear blight caused by Alternaria alternate and Nigrospora oryzae was higher in a plot inoculated at right before heading time than (in n plot inoculated) on heading time. Meanwhile, the incidence of rice ear blight caused by Bipolaris oryzae and Curvularia lunate was higher in a plot inoculated on heading time than in a plot inoculated at right before heading time. In rice quality, the ratio of imperfect grains was increased at right before heading time or on heading time by Nigrospora oryzae or Alternaria alternata, respectively. As discoloration rate of rice grains increased on 'Ilmi-byeo', the percentage of perfect grains decreased proportionally and the percentage of damaged rice grains increased remarkably.
Keywords
Rice ear blight; Rice quality; Yield loss;
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Times Cited By KSCI : 1  (Citation Analysis)
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