Abstract:

【Objective】 Study on the parasitism and pathogenicity of ten populations of Radopholus similis intercepted from different imported host plants and reproduced on carrot callus to Nicotiana tabacum and Mangifera indica. 【Method】 Research on the parasitism and pathogenicity of the R.similis populations was proformed by a pot trial in greenhouse. 【Result】 A lot of R. similis were recovered from the roots and media of Nicotiana tabacum and Mangifera indica, indicating that the reproductive factor of R. similis were over one on these plants. The Nicotiana tabacum and Mangifera indica inoculated with R. similis grew slowly and smaller than the plant without inoculation of R. similis. Obvious symptoms were observed on the roots that became faint, chlorotic and rot. 【Conclusion】 The Nicotiana tabacum and Mangifera indica are new good hosts for R. similis. The R. similis have obvious pathogenicity to the two plants, and there are differences in pathogenicity among populations.

Key words: Radopholus similis, pathogenicity, Mangifera indica, Nicotiana tabacum