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The sweetpotato whitefly Bemisia tabaci (Homoptera:Aleyrodidae) is a destructive pest of agriculture and horticulture worldwide.Recent phylogenetic analysis using mitochondrial cytochrome oxidase 1 sequences indicates that this whitefly is a species complex including at least 24 morphologically indistinguishable but genetically distinct cryptic species.In this study,the inter-species crosses of Middle East-Asia Minor 1 (MEAM1),Mediterranean (MED) and Asia Ⅱ 7 cryptic species,which were referred to as B,Q and Cv biotypes before,were conducted in two different devices,leaf cages (7 cm3)and cylinder cages (280 cm3),and at three temperatures of 22,30 and 38℃.Results indicated that no female progeny were produced in the reciprocal cross between MEAM 1 ×Asia Ⅱ 7,between MED×Asia Ⅱ 7 cryptic species neither in leaf cage nor in cylinder cages,while 0.81 and 1.37％ of females in the offspring were recorded in the reciprocal cross between MEAM 1×MED in leaf cage experiments.Approximately 0.95-0.98％ female progeny were recorded in the reciprocal cross between MEAM1 ×MED at 30℃,0.77％ female progeny were recorded in the single cross direction between MEAM1♀×MED ♂ at 22℃,and no female progeny were found in their reciprocal cross at 38℃ in leaf cage.Our findings indicated that neither space dimension nor temperature have a significant effect on the hybridization of different B.tabaci cryptic species.