| 벼 누른오갈병(Sclerophthora macrospora)발생이 벼 생육에 미치는 영향 및 병 저항성 품종 검정 |
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이용환, 차관홍, 고숙주, 박기범, 김영철 |
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| Effect of Rice Downy Mildew (Sclerophthora macrospora) on Rice Growth and Screening of Disease Resistance of Cultivars |
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Yong Hwan Lee, Kwang Hong Cha, Sug Ju Ko, Ki Beum Park, Young Cheol Kim |
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| Abstract |
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It was conducted to investigate the effect of rice downy mildew (RDM) infection to plant growth and yield components in water seeding stage, and to screen of varietal resistance to downy mildew. Being infected by rice downy mildew, chlorotic spot appeared in the leaf and leaf length was shortened. As the infected rice was growing, internode was not elongated properly and was deformed, and then panicle was not arised or malformed. Plant height of infected rice was shortened at all growth stage, and while the number of tillers of infected rice was more decreased than that of healthy plant before maximum tillering stage, and that of infected rice was more increased after heading stage. While the number of internode of infected tiller was much increased than that of healthy tiller, internode length of infected tiller was shorter. As the rice infected by RDM severely, the number of panicles per square meter and ripening of rice was more decreased and yield of rice was extremely much decreased. As result of the varietal resistance screening with rice seedling, Geyhwabyeo and Donjinbyeo were resistant varieties to downy mildew. |
| Key Words:
rice downy mildew, RDM, Sclerophthora macrospora, plant growth, cultivar resistance, yield |
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