Survey of Major Disease Incidence of Rice in Korea during 1999-2008

Lee, Yong Hwan; Ra, Dong Soo; Yeh, Wan Hae; Choi, Hyo Won; Myung, Inn Shik; Lee, Se Won; Lee, Yeong Hoon; Han, Sung Suk; Shim, Hong Sik

Research in Plant Disease 2010;16(2):183-190.
Published online August 30, 2010.

1999-2008년도 벼 주요 병해 발생 개황

이용환, 나동수, 예완해, 최효원, 명인식, 이세원, 이영훈, 한성숙, 심홍식

Survey of Major Disease Incidence of Rice in Korea during 1999-2008

Yong Hwan Lee, Dong Soo Ra, Wan Hae Yeh, Hyo Won Choi, Inn Shik Myung, Se Won Lee, Yeong Hoon Lee, Sung Suk Han, Hong Sik Shim

Abstract

During the period from 1999 to 2008, we surveyed the major diseases incidence of rice in Korea. Leaf blast showed 0.85% of the diseased leaf area in 2000 and then consistently decreased to 0.02% by 2008. However, panicle blast irregularly appeared by the years depending on weather conditions for disease development from heading to milk stage of rice. Diseased lesion height of sheath blight had the lowest (10.1%) incidence in 2001 and the highest (21.4%) incidence in 2007. A negative corelation (r=-0.88 *) was measured between diseased lesion height of sheat blight and sunshine hours from mid- to late August. In Chunbuk, Gyeongbuk, and Gyeongnam provinces, brown spot occurrence declined since 2001, however, in Chungnam, Jeonbuk, and Jeonnam provinces, it increased since 2005. False smut drastically decreased after showing the highest incidence of 7.59% in panicles in 2000. The correlation coefficient between diseased panicles of false smut and rainfall during the late August was calculated as 0.94 **. Bacterial leaf blight severely increased in the chronically infested fields in Jeonnam, Jeonbuk, Gyeongnam, and Chungnam province since 2003.

Key Words: Disease incidence, Korea, Rice