Research in Plant Disease 2009;15(2):106-111.
Published online August 30, 2009.
배추 무사마귀병 발병 억제 및 생육증진을 위한 달걀껍질 토양혼화처리 효과
가오유량, 김병관, 임태헌, 리규화, 백기엽, 차병진
Soil-blending Effect of Eggshell Powder on the Control of Clubroot Disease and the Growth of Chinese Cabbage in the Field
Yu Liang Gao, Byeong Kwan Kim, Tae Heon Lim, Kui Hua Li, Kee Yoeup Paek, Byeong Jin Cha
Before transplanting Chinese cabbage seedlings, two kinds of eggshell powder were blended into the soil of cabbage field where the clubroot pathogen, Plasmodiophora brassicae, was infested. The incidence of clubroot disease, the shoot and root growth of cabbages, and soil pH were examined four times at 10 to 13 days interval from transplanting Chinese cabbage. As results, the cabbages treated with eggshell powder without membrane showed the fastest growth in above ground part, and the lowest disease index for clubroot disease. The cabbages treated with eggshell powder with membrane showed better growth than the cabbages of non-treated check, but lower growth than those treated with eggshell powder without membrane. Soil pH started to increase from 3 weeks after soil blending of eggshell powder, and it reached to above 8.0. However, the soil pH of non-treated check stayed at around 6.8. In the experiment to compare the effect of eggshell powder with other calcium compounds, soil-blending of CaCO3 resulted the lowest disease incidence of 1.7 and the registered fungicide, ``flusulfamide``, and the resistant variety ``CR Green cabbage`` followed with the incidence of 1.9. Cabbages of non-treated check scored the highest disease incidence, 3.4, and that of eggshell powder without membrane was as high as 2.7. However, the growth of Chinese cabbage showed the different pattern to the disease incidence. Chinese cabbages treated with eggshell without membrane recorded the highest average growth, around 2.1 kg. On the other hand, the average growth of CR Green Chinese cabbage was about 2.0 kg, that of flusulfamide-treatment plot was 1.7, and that of non-treated check was as low as 1.3 kg. Soil blending of eggshell powder without membrane did not inhibit the development of clubroot, but increased the growth of cabbage to a great extent. Therefore, it was confirmed that soil blending of eggshell powder before transplanting makes the Chinese cabbage culture possible even in the field infested with clubroot pathogen.
Key Words: Chinese cabbage, Clubroot, Control, Eggshell, Plasmodiophora brassicae

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