Studies on phenotypic variation of a plant species from natural populations can not only provide fundamental data for its genetic improvement,but also conduce to understand plant adaptability and probe into its evolution way and mechanism.

Experimental studies were conducted to determine the reproductive compatibility between the newly invaded B biotype and a non-B biotype (China-ZHJ-1 population) of Bemisia tabaci from Zhejiang, China, and to compare their morphological and biological characteristics, including development duration, the ability to cause squash silverleaf and host plant adaptability.