change in the biotype composition of bemisia tabaci in shandong province of china from 2005 to 2008.certain biotypes of the bemisia tabaci (gennadius) (hemiptera: aleyrodidae) complex cause extensive damage and are important pests and virus vectors in agricultural crops throughout the world. among the most invasive and well studied are the b and q biotypes. recent reports in shandong province, china, have indicated that the q biotype was introduced there in approximately 2005, whereas the b biotype has been established there for approximately 10 yr. even so, the present distribution of the two ...201020550819
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