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http://dx.doi.org/10.5423/RPD.2004.10.3.167

Micro- Weather Factors during Rice Heading Period Influencing the Development of Rice Bacterial Grain Rot  

Lee, Yong-Hwan (전남농업기술원)
Ko, Sug-Ju (전남농업기술원)
Cha, Kwang-Hong (전남농업기술원)
Choi, Hyeong-Gug (전남농업기술원)
Lee, Doo-Goo (작물과학원 호남농업연구소)
Noh, Tae-Hwan (작물과학원 호남농업연구소)
Lee, Seung-Don (농업과학기술원)
Han, Kwang-Seop (충남농업기술원)
Publication Information
Research in Plant Disease / v.10, no.3, 2004 , pp. 167-174 More about this Journal
Abstract
To make the forecasting model of rice bacterial grain rot (RGBR) using the statistical procedures with SAS(Statistical Analysis System) based on micro-weather factors during heading period of rice, 21 rice varieties having the different heading time (40% panicles headed) were planted at 30 May and 15 June in Naju. Heading time and diseased panicles were investigated from July to August in 1998. RGBR mainly occurred on varieties headed from 29 July to 19 August, but not on varieties headed after 22 August. RGBR was highly correlated with diurnal temperature during 7 days (r =-0.871 **) and 10 days (r =-0.867**) and minimum relative humidity during 15 days from 3 days before heading time. After examining the models with several ways ($R^2$, Adjusted $R^2$, MSE), one equations were selected: Y =92.83 - 2.43Tavr + 1.88Tmin - 1.04RHavr + 0.37RHmin + 0.43RD - 3.68WS ($R^2$=0.824) using six variables of average and minimum temperature (Tavr and Tmin), average and minimum relative humidity (RHavr and RHmin), rainy days (RD), and wind speed (WS) during 7 days from 3 days before to 3 days after heading time.
Keywords
Burkholderia glumae; forecasting; micro-weather factor; rice bacterial grain rot;
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