Threshold of Soil pH for Occurrence of Tobacco Bacterial Wilt in Henan Province  

作　　者：Haitao Wang Haohao Hao Xiaojing Xu Haitang Huang Xueli Song Lijun Yang 

机构地区：[1]Institute of Tobacco Research,Henan Academy of Agricultural Sciences,Xuchang 461000,China [2]Zhumadian Branch of Henan Provincial Tobacco Company,Zhumadian 463000,China

出　　处：《Plant Diseases and Pests》2021年第2期11-15,共5页植物病虫害研究（英文版）

基　　金：Supported by Research Project of Zhumadian Branch of Henan Provincial Tobacco Company(201641170024101)。

摘　　要：[Objective]The paper was to study the relationship between spatial distribution characteristics of soil p H and bacterial wilt in tobacco-growing area in Henan Province.[Method]The 21 tobacco-growing fields infected by bacterial wilt and 91 tobacco-growing fields with no cases were selected from Henan Province,and the pH of fields was determined.[Result]Bacterial wilt mainly occurred in the tobacco-growing fields in Luoshan,Pingqiao,Queshan,Biyang,Suiping,and Xiping,and the soil pH mainly ranged from 5.5 to 6.5(accounted for 84.75%of total surveyed tobacco fields);bacterial wilt had not been found in tobacco-growing fields in Tanghe,Zhengyang,Shangcai,Sheqi,Wuyang and Chenqu,and the soil pH mainly ranged from 6.5 to 7.0(accounted for 81.25%of total surveyed tobacco fields).There were significant differences in soil pH between the fields with and without bacterial wilt,and soil pH 6.5 could be regarded as the threshold for the occurrence of tobacco bacterial wilt in Henan Province.There was extremely significantly positive linear correlation between soil p H and latitude(y=0.7375 x-17.799,R2=0.386,P<0.01).The geographical boundary of soil pH 6.5 was roughly 33°N,and bacterial wilt was less likely to occur in the north tobacco-growing areas of the boundary.[Conclusion]The study will provide a scientific basis for the prevention and control of tobacco bacterial wilt in Henan.

关 键 词：Soil pH Bacterial wilt TOBACCO HENAN 

分 类 号：S435.72[农业科学—农业昆虫与害虫防治] S153.4[农业科学—植物保护]