Bemisia tabaci biotype Q in China (Shandong) orginated from the western Mediterrenean regions. B. tabaci biotype Q was introduced into Shandong province of China in 2006 and has since displaced the previous well-established population of biotype B in the whole province. The populations of B. tabaci biotype Q in the field have a rapid genetic turnover. These findings will be helpful to the management of whitefly populations in the field.