[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 plann...[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.展开更多
文摘[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.
