Research in Plant Disease 2009;15(3):242-247.
Published online December 30, 2009.
윤작작물 재배에 의한 배추 뿌리혹병 방제 효과
김점순, 이정태, 이계준
 
Effect of Crop Rotation on Control of Clubroot Disease of Chinese Cabbage Caused by Plasmodiophora brassicae
Jeom Soon Kim, Jeong Tae Lee, Gye Jun Lee
Abstract
To select rotation crops for control of clubroot of Chinese cabbage, potato, corn, soybean, onion and groundsel were planted in the field infected with clubroot pathogen (Plasmodiophora brassicae) in highland area in 2000. In comparison of economical efficiency among rotation crops, potato and onion gained about 16.9 and 14.9 times higher, respectively, than successive cultivation of Chinese cabbage. Resting spore densities of Plasmodiophora brassicae after harvesting rotation crops were in the range of 0.3~1.2×103/g soil in all cultivated soils with rotation crops while that of successive Chinese cabbage cultivation soil was very high as much as 89.3×103/g soil. And disease severity of Chinese cabbage clubroot was 4.9, 20.2, 24.4, 25.1 and 27.8% in onion, soybean, potato, corn, and groundsel cultivation plot, respectively, while that of successive Chinese cabbage cultivation plot was very high as 77.8%. Effect of rotation period of onion, potato, soybean on disease control was investigated from 2002 to 2005. Resting spore densities of Plasmodiophora brassicae after cultivating rotation crops were decreased until 2nd year and maintained low density at 3rd year in all plots, while that of successive Chinese cabbage cultivation plot was increased 2.6 to 23.6 times for three years. When Chinese cabbage was rotation-cultivated with potato, soybean and onion for three years, disease severities of Chinese cabbage clubroot decreased 92 to 4.4%, 72 to 10.4% and 72 to 12.2%, respectively, while that of successive Chinese cabbage cultivation plot maintained 100%. As the rotation period increased, the yields of Chinese cabbage increased, while that of successive Chinese cabbage cultivation plot decreased. At 3rd year, Chinese cabbage with high quality could be much more produced 2,205, 2,493 and 2,476 g in potato, soybean and onion cultivation plot, respectively, than 95 g in successive Chinese cabbage cultivation plot.
Key Words: Chinese cabbage, Clubroot, Control, Rotation


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