Research in Plant Disease 2010;16(2):109-114.
Published online August 30, 2010.
2008-2009년 충북지역 벼 줄무늬잎마름병 발생 요인 분석
강효중, 안기수, 한종우, 정경헌, 박세정, 지재준, 김정수
Analysis of the Factors Involved in the Occurrence of Rice Stripe virus in Chungcheongbukdo in 2008 and 2009
Hyo Jung Kang, Ki Su Ahn, Chong U Han, Kyeong Heon Jeong, See Jung Park, Jae Jun Ji, Jeong Soo Kim
The occurrence factors of Rice stripe virus (RSV) in Chungcheongbukdo were analyzed by investigating the viruliferous insect rate (VIR) of overwintered small brown plant hopper (SBPH), the population density of SBPH, the infection rate of natural host plants, and the occurrence rate of RSV on rice paddy fields at the 3 areas of Cheongwon, Jincheon, and Boeun in 2008 and 2009. The average VIR of overwintered SBPH was 0.0% in 2008 and 1.1% in 2009. From SBPH collected on early June in 2009, VIR was higher as 1.4% at Jincheon and 4.2% at Boeun than those of overwintered SBPH, and this higher VIR might relate stronlgy with the adult population of SBPH immigrated from China. The populations of SBPH at Cheongwon, Jincheon and Boeun in 2008 were 3.8, 7.5 and 20.8 Head/m2, respectively. However, those of Cheongwon and Jincheon increased up to about two folds as 8.4 and 13.1 in 2009. No RSV was detected on the natural host plants including barley. The factors involved in RSV occurrence were affected negatively by the low VIR of overwintered SBPH, the low population of overwintered SBPH, the low infection rate of RSV on the natural host plants, and the clean cultivation environment in Chungcheongbukdo.
Key Words: Chungcheongbukdo, Rice stripe virus, Small brown plant hopper

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