Research in Plant Disease 2013;19(2):84-89.
Published online June 30, 2013.
충남지역의 벼 줄무늬잎마름병 발생감소 요인 분석
김병련 ( Byung Ryun Kim ) , 정태우 ( Tae Woo Jeong ) , 한광섭 ( Kwang Seop Han ) , 함수상 ( Soo Sang Hah ) , 김영진 ( Young Jin Kim ) , 남윤규 ( Yun Gyu Nam ) , 최홍수 ( Hong Soo Choi ) , 김정수 ( Jeong Soo Kim ) , 유승헌 ( Seung Hun Yu )
 
Analysis of the Factors for Decrease of Rice Stripe Disease in Chungnam Province
Byung-Ryun Kim1*, Tae-Woo Jeong2, Kwang-Seop Han1, Soo-Sang Hahm1, Young-Jin Kim3, Yun-Gyu Nam1, Hong-Soo Choi4, Jeong-Soo Kim5 and Seung-Hun Yu6
1Chungnam Agricultural Research and Extension Services, Yesan 340-861, Korea
2Chungnam Tean Agriculture Technology & Extension, Taean 357-903, Korea
3Chungnam Seocheon Agriculture Technology & Extension, Seocheon 325-811, Korea
4Crop Protection Division, National Academy of Agricultural Science, Suwon 441-707, Korea
5Major in Plant Medicine, Andong National University, Andong 760-749, Korea
6Department of Applied Biology, Chungnam National University, Daejeon 305-764, Korea
Received: February 25, 2013   Revised: May 23, 2013   Accepted: June 09, 2013
Abstract
The incidence factors of Rice stripe virus (RSV) were analyzed by studying the population density and the viruliferous insect rate (VIR) of small brown planthopper (SBPH), the incidence of stripe disease, alternate host, and susceptible cultivar in Chungnam Province. The population of overwintering SBPH had been decreasing, but the VIR of overwintering SBPH had not been differing for three years, 2008 to 2010. No RSV was detected in the natural host plants, such as short awn, annual bluegrass, and barley. In 2009, relatively large population of SBPH with the VIR of 5.4% migrated from China. However, there was no evidence relating of migration large amount of SBPH from China in 2008 and 2010. Also the infection rate of RSV in rice was less than 1% in these periods. The cultivation area of the susceptible varieties had steadily decreased from 41% to 19% from 2007 to 2009. Therefore, the reduction factors of rice stripe disease in Chungnam Province with higher influx of inoculum could be with an appropriate forecasting and chemical control, cultivation of resistant varieties, changes in the cropping system, and the low winter-spring temperature.
Key Words: Rice, Rice stripe virus, Small brown planthopper, Viruliferous ratio


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