Neoceratitis asiatica (Diptera: Tephritidae) is a disastrous pest for wolfberry production in China. In our preliminary field trapping experiment, both female and male N. asiatica adults were captured by male-produced sex attractant. To provide a solid background for studying mechanism of olfaction, the sensilla of antenna and maxillary palp of N. asiatica adults were studied by means of scanning electron microscopy. Both sexes have 3 antennal segments, including scape, pedicel, and flagellum, while arista is arisen from the proximal dorsal ridge of the flagellum. Two types of sensilla were found on the scape and pedicel, sensilla microtrichia (AnMi) and sensilla chaetica (AnCh). There are five types of sensilla on the flagellum, sensilla basiconica (AnB), clavate sensilla (AnCl), sensilla trichoidea (AnTr), sensilla coeloconica (AnCo), and AnMi. Three types of sensilla were observed on maxillary palp, sensilla basiconica (MpB), sensilla microtrichia (MpMi), and sensilla chaetica (MpCh). AnMi and MpMi are the most abundant sensilla type on antenna and maxillary palp, respectively. With the exception of having longer flagellum in females, the dimension of antennal segments, type and number of sensilla, density of pores on the shaft of AnCl, AnCh, AnB and MpB, and at the base area of AnCh and MpCh didn’t show differences between sexes. This lack of inter-sexual differences may be related to chemoreception of male-emitted sex pheromone and of host plant volatiles by both female and male adults.

Neoceratitis asiatica（双翅目：实蝇科）是我国枸杞生产的灾难性害虫。在我们的初步田间诱捕实验中，雌性和雄性N. asiatica成虫都被雄性性引诱剂捕获。为研究积雪草的嗅觉机制、触角感受器和上颌触须提供坚实的背景成人通过扫描电子显微镜进行研究。两性都有3个触角节段，包括花梗、花梗和鞭毛，而触角长于鞭毛的近端背脊。在花梗和花梗上发现了两种类型的感受器，小毛感受器（AnMi）和毛毛感受器（AnCh）。鞭毛上有五种类型的感受器，基本感受器（AnB）、棒状感受器（AnCl）、毛状感受器（AnTr）、腔感受器（AnCo）和AnMi。在上颌触须上观察到三种类型的感受器，基本感受器（MpB）、小毛感受器（MpMi）和毛状感受器（MpCh）。AnMi 和 MpMi 分别是触角和上颌触须上最丰富的感受器类型。除了雌性的鞭毛较长外，触角节的尺寸，AnCl、AnCh、AnB 和 MpB 轴上的感受器的类型和数量，以及 AnCh 和 MpCh 基区的孔密度没有表现出性别差异。这种性别间差异的缺乏可能与雌性和雄性成虫对雄性释放的性信息素和寄主植物挥发物的化学感受有关。