Flusulfamide 입제에 의한 배추무사마귀병의 방제효과 |
장현철, 이선욱, 김점순, 윤여순, 최근숙, 김학기, 김병섭 |
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Control Efficacy of Flusulfamide GR on Chinese Cabbage Clubroot Caused by Plasmodiophora brassicae |
Xuan Zhe Zhang, Sun Uk Lee, Jeom Soon Kim, Yeo Sun Yoon, Geun Suk Choi, Hak Ki Kim, Byung Sup Kim |
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Abstract |
To investigate control efficacy of flusulfamide GR (granule) on Chinese cabbage clubroot caused by Plasmodiophora brassicae, experiment was accomplished in field located in Gangneungshi alpine area contaminated by P. brassicae. Flusulfamide GR provided control value of 84.6% and that was statistically significant difference from standard fungicides containing untreated control. To investigate ratio of reduction of resting spore according to fungicide treatment, soil of Chinese cabbage field before and after fungicide treatment were sampled and investigated density of resting spore. Resting spore density was not uniform in soil before fungicide treatment. Therefore, to investigate control efficacy of fungicide against clubroot, investigation on resting spore density was conducted before experiment and reflected in experimental design. Flusulfamide GR and DP (dust powder) provided 64.2% and 63.7% of reduction of resting spore on field soil after fungicide treatments. This result indicated that control efficacy of the fungicides was correlated with reduction of resting spore of P. brassicae. The increasing rate in fresh weight of above-ground part of Chinese cabbage by flusulfamide DP and GR, fluazinam DP and trifloxystrobin SC (suspension concentrate) was 14.3%, 13.0%, 13.8% and 3.8%, respectively. From above result, flusulmide GR have outstanding control efficacy against clubroot of Chinese cabbage and is effectively decreasing of resting spore density in soil. |
Key Words:
Clubroot, Flusulfamide GR, Plasmodiophora brassicae, Resting spore |
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