Diversity and expression of P450 genes from Dendroctonus valens LeConte (Curculionidae: Scolytinae) in response to different kairomones

► Eleven full-length CYP genes were identified in Dendroctonus valens' antenna and gut. ► The expression of some genes in the antenna was dependent upon sex and treatment. ► The CYP genes in the gut showed a different expression respet to monoterpene assayed. ► Over-expression of CYP6 and CYP9 gene suggests a role in the detoxification process.