斜纹夜蛾侧沟茧蜂触角感受器的扫描电镜观察

应用扫描电镜对斜纹夜蛾侧沟茧蜂(Microplitis prodeniae)的触角感受器进行观察。结果显示:触角为线形,鞭节有16亚节;触角共有6类感器,分别为毛形感器、刺形感器、锥形感器、腔锥形感器、板形感器和钟形感觉器;毛形感器最多,分布整个触角;刺形感器分布在柄节和梗节,数量较少;锥形感器、腔锥形感器、板形感器和钟形感觉器分布在鞭节,其中钟形感觉器仅着生于雄蜂鞭节;雌雄蜂触角在形状和结构上相似,但雄蜂触角的长度和直径显著大于雌蜂;雄蜂板形感器的数量、大小和密度显著高于雌蜂。

Antennal Sensilla of Microplitis prodeniae Observed with Scanning Electron Microscope

Microplitis prodeniae Rao and Chandry(Hymenoptera: Braconidae)is an important larval parasitoid of Spodoptera litura. In this study, the antennal sensory sensilla of M. prodeniae was observed with scanning electron microscopy. Observations determined that the antennae of M. prodeniae was threadlike and the flagella was composed of 16 sub-segments. Six distinct types of sense receptors were observed, including sensilla trichodea, sensilla chaetica, sensilla basiconica, sensilla coeloconica, elongated sensilla placodea and sensilla campaniformia. The s. trichodea was the most abundant sensilla and distributed over the entire antennae, while s. chaetica was found on the scape and pedicle in low numbers. S. basiconica, s. coeloconica, elongated sensilla placodea and s. campaniformia were limited to the flagellum, and s. campaniformia was only found on male antennae. The shape and structure of antennae between male and female adults were similar, but the length and diameter of the antennae on males were significantly greater than those of females. Also, the number, size and density of s. placodea of the male wasps were significantly greater than those of females.