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Root rot commonly begins developing in May. The disease occurrence of root decay had been which range from 37 to 46per cent in root portions and basal stem of R. pseudostellariae under the successive monoculture fields in Shibing County, Guizhou Province, China (108°12'E, 27°03'N) (Li et al. 2017). Extreme root decompose ended up being observed in Shibing County in May 2018. Infected plants displayed curly, withered, and yellow leaves, blight, retarded development, root decay, and yield l