广东朱槿曲叶病发生及传播介体烟粉虱种群组成调查

摘要

Background] The Cotton leaf curl Multan virus ( CLCuMuV) , transmitted by the whitefly Bemisia tabaci was first repor-ted in Guangdong Province in 2006. Due to the cryptic species structure of the B. tabaci complex, the interacton between the CLCu-MuV and the whitefly in southern China is not clear. [Method] We investigated the CLCuMuV infection rates and identified the cryptic species of B. tabaci in Guangzhou and Qingyuan cities in Guangdong Province. [Result] The percentage of China rose plants ( Hibiscus rosa-sinensis) infected with CLCuMuV was 53. 98%~71. 78% in Guangzhou and 38. 42%~45. 27% in Qingyuan. The whiteflies were a mixture of MEAM1 and AsiaⅡ7, with the latter being in the minority (6.25%~17.71%) in Guangzhou but form-ing the majority (76.25%~89.17%) in Qingyuan. [Conclusion and significance] With the sick plants range expansion and poison cryptic species of B. tabaci diffusion, CLCuMuV is may spread in large scale, prevention and monitoring work should be developed.%【背景】2006年我国广东地区发现由木尔坦棉花曲叶病毒( CLCuMuV)侵染引起的朱槿曲叶病，但有关该病害在朱槿植物上的发病率、传播介体———烟粉虱隐种的组成尚未见报道。【方法】在广东省广州和清远地区对感染CLCuMuV的朱槿植株进行抽样调查；利用mtCOⅠ引物扩增鉴定烟粉虱隐种种群组成。【结果】调查表明，广州和清远地区朱槿上CLCuMuV的发病率分别为53.98％~71.78％和38.42％~45.27％。烟粉虱种群均为MEAM1和AsiaⅡ7隐种的混合种群；广州地区烟粉虱种群中AsiaⅡ7隐种的比例为6.25％~17.71％，清远地区AsiaⅡ7隐种的比例为76.25％~89.17％。【结论与意义】随着带病植株种植范围的扩大以及可传毒烟粉虱隐种的扩散，CLCuMuV很有可能大范围扩散流行，应做好防控监测工作。