In March 2005, the first U.S. detection of the ‘Q’ biotype of Bemisia tabaci was found on poinsettia plants from a California nursery. This strain of whitefly displays resistance to pyriproxyfen, buprofezin and has reduced susceptibility to the neonicotinoid insecticides: imidicloprid, acetamiprid and thimethoxam. Bemisia tabaci and its biotypes have a host range of over 500 species of plants in 74 plant families. High population densities can cause death of seedlings, reduced vigor and defoliation. The biotypes are also known vectors of serious plant pathogenic Gemini viruses such as Tomato yellow leaf curl virus (TYLCV), Tomato mottle virus (TMoV) and Bean golden mosaic virus (BGMV).
For more information, see the following website:
FDACS-DPI Pest Alert: Bemisia tabaci (Gennadius) (biotype ‘Q’): A potential new biotype for Florida’s vegetable and ornamental crops. (Hemiptera: Aleyrodidae), http://www.doacs.state.fl.us/pi/enpp/ento/b.tabaci.html