This study was carried out to compare the growth and yield characteristics between bakanae diseases (Gibberella fujikuroi) infected and normal rice plants. The infected rice seeds, harvested in last year, were disinfected by prochloraz for 48 hours at 33℃ using sprouting machine, 24 hours at room temperature and not disinfected. In the methods of disinfection, it is more effective in disinfected by prochloraz for 48 hours at 33℃ using sprouting machine near to 0% of infection rate, followed by conventional method as 5.0% and 76% in not disinfected rice seeds. In the rice yield components among the disinfection methods, panicles were increased about 11% in the disinfected seeds using sprouting machine for 48 hours compared to conventional method. Ripening grain rate also increased at the disinfected using sprouting machine as 80.3~80.3%, improved more than 4.9~5.9% comparing to the conventional disinfection. From these results, the rice yield was 512~517kg/1,000㎡ at the disinfected using sprouting machine which increased more than 6~7% compared to the conventional disinfection.

This study was conducted to identify the varietal differences of the viviparous germination and viviparous germinated seed characteristics occurred by continuous rain during maturing stage of rice in 2007. The viviparous germination rates were increased in early and medium-maturing cultivars such as Unkwangbyeo and Gopumbyeo. In the germinating rates using already viviparous germinated seeds were severely deteriorated by 15.3 and 28.2% compared to those of normal seeds as 97.3 and 98.5% on Unkwangbyeo and Gopumbyeo. The regermination rates were increased as the plumule length of already viviparous germinated seeds was shorter, so it is 46.7% in less than 0.9mm plumule length and 12.7% in 1.0~1.9mm.