In order to effectively prevent and control rapeseed clubroot disease,the incidence of rapeseed clubroot disease from 2017 to 2021 in the main rapeseed areas in Hunan was investigated by means of inquiry,field inspection and randomfive-point sampling.The causes of rapeseed clubroot disease were analyzed,and the control measures were put forward.The results showed that rapeseed clubroot disease mainly occurred in the Huaihua and Changde areas,particularly Yuanling,Xupu and Linli were the most serious counties.The occurrence of this disease was a...