Detection and Analysis of Number of Ralstonia solanacearum in Soil before Winter Tillage in Fuzhou Tobacco-growing Area, Jiangxi Province  

作　　者：Zhang Zhigao Hu Liwei Feng Xiaohu Mou Wenjun Wang Libing Zhang Rui 

机构地区：[1]Fuzhou branch of Jiangxi Tobacco Company,Fuzhou 344000,China [2]Zhengzhou Tobacco Research Institute,Zhengzhou 450000,China

出　　处：《Plant Diseases and Pests》2019年第5期1-3,10,共4页植物病虫害研究（英文版）

摘　　要：[Objective]The paper was to optimize the tobacco planting area in Fuzhou City and to prevent the outbreak of tobacco bacterial wilt in large area.[Method]At the end of 2017,soil samples were collected from plots planned to be planted with tobacco in the following year in Yihuang,Guangchang,Lichuan and Le’an counties.[Result]Among 352 plots,116 plots were infected by Ralstonia solanacearum,while 236 plots were free of the pathogen,and the infected plots accounted for 32.95% of total plots.Among them,75 plots exceeded the order of magnitudes of 103,accounting for 21.31% of total plots and 64.66% of infected plots.It is suggested that the plots with an order of magnitude above 103 should be pretreated with quicklime or purple soil,or conducted crop rotation,or seeds must be directly abandoned;the dosage of biocontrol agents should be increased in planting.The plots with an order of magnitude below 103 should be pretreated with quicklime or purple soil,and the dosage of biocontrol agents should be increased in planting.[Conclusion]The results provide reliable theoretical basis and data support for soil improvement and bacterial wilt control.[Objective] The paper was to optimize the tobacco planting area in Fuzhou City and to prevent the outbreak of tobacco bacterial wilt in large area. [Method] At the end of 2017, soil samples were collected from plots planned to be planted with tobacco in the following year in Yihuang, Guangchang, Lichuan and Le’an counties. [Result] Among 352 plots, 116 plots were infected by Ralstonia solanacearum, while 236 plots were free of the pathogen, and the infected plots accounted for 32.95% of total plots. Among them, 75 plots exceeded the order of magnitudes of 10~3,accounting for 21.31% of total plots and 64.66% of infected plots. It is suggested that the plots with an order of magnitude above 10~3 should be pretreated with quicklime or purple soil, or conducted crop rotation, or seeds must be directly abandoned; the dosage of biocontrol agents should be increased in planting. The plots with an order of magnitude below 10~3 should be pretreated with quicklime or purple soil, and the dosage of biocon-trol agents should be increased in planting. [Conclusion] The results provide reliable theoretical basis and data support for soil improvement and bacterial wilt control.

关 键 词：TOBACCO Ralstonia SOLANACEARUM Winter TILLAGE BIOCONTROL 

分 类 号：S435.72[农业科学—农业昆虫与害虫防治]