Morphological studies on the types and distribution of antennal sensilla in Spodoptera exigua(Hübner)

【Objective】The study is to inquire into the antennal sensilla type,number and distribution of the Spodoptera exigu(Hubner) to provide basic data for its further study about ecology,electrophysiology etc.【Method】With scanning electron microscope(SEM).【Result】The result showed that six types of sensilla were found on male and female of S.exigua(Hubner),namely sensilla trichodea,sensilla chaetica,sensilla basiconica,sensilla coeloconica,sensilla cavity and sensilla auricillica.The sensilla trichodea and sensilla auricillica were the most numerous.In addition,the sensilla chaetica consisted of longer sensilla chaetica and shorter sensilla chaetica.There are differences between male and female adults in type,number,distribution and characteristics.【Conclusion】The Spodoptera exigu(Hubner) has enrich antennal sensilla,and its distribution present law to some extent.