樟巢螟成虫触角感器的扫描电镜观察

Ultrastructure of antennal sensilla of adult Orthaga achatina with a scanning electromicroscope

利用扫描电镜观察了樟巢螟Orthaga achatina Butler成虫触角的外部形态、感器类型及其分布。樟巢螟成虫触角由柄节、梗节和分为75～85个亚节的鞭节组成;触角背面被覆鳞片,绝大部分感器位于触角的腹面和侧面。樟巢螟成虫触角上都分布有以下8种感器:毛形感器、刺形感器、腔锥形感器、耳形感器、鳞形感器、栓锥形感器、Bhm氏鬃毛和腔乳头状感器,其中以毛形感器的数目最多,并可分为Ⅰ型和Ⅱ型。除Bhm氏鬃毛外,所有的感器都分布在触角鞭节的网纹区上。感器的类型及其分布位置无性别差异。

The morphological structure of the antennae in adult Orthaga achatina Butler were observed with a scanning electron microscope.The antennae of both male and female moths consisted of scape,pedicel and flagellar segments,the flagellar segment containing 75-85 subsegments.The dorsal side of the antennae is covered by dense scales,while the ventral and lateral sides possess the most sensilla.The surface of the flagellar segment is characterized by reticular cuticle,but the scape and pedicel segments lack this characteristic.There are 8 types of sensilla found on the antennae of males and females;sensilla trichodea,sensilla chaetica,sensilla coeloclnica,sensilla auricillica,sensilla squamiformia,sensilla styloconica,Bhm bristles and sensilla cavitata-peg.Of these,the sensilla trichodea are the most abundant and can be morphologically subdivided into two distinct types （Type I and TypeⅡ）.All sensilla,with the exception Bhm bristles,occur on the reticular area of the flagellar segment.There is no difference in sensilla types and their distribution between male and female.