香蕉穿孔线虫对烟草和芒果的寄生性和致病性

 【目的】利用从进口观赏植物上截获，并培养保存在胡萝卜愈伤组织上的香蕉穿孔线虫10个种群，研究香蕉穿孔线虫对烟草和芒果的寄生和致病性。【方法】采用温室盆栽接种方法，进行寄生和致病性测定。【结果】香蕉穿孔线虫在烟草和芒果根际的繁殖率Rf＞1，接种香蕉穿孔线虫的烟草和芒果植株生长缓慢、矮小，根系衰弱、变色腐烂，有明显受害症状。【结论】烟草和芒果是香蕉穿孔线虫新的适合寄主植物，香蕉穿孔线虫对这2种植物具有明显的致病性，不同种群的致病力有差异。

Parasitism and Pathogenicity of Radopholus similis to Nicotiana tabacum and Mangifera indica

【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.