豇豆荚螟幼虫头部形态及化学感受器观察

［目的］了解豇豆荚螟（Maruca vitrata）幼虫头部感受器的形态、数量和分布，为探讨其功能和感应机制提供依据。［方法］ 利用扫描电镜对豇豆荚螟5龄幼虫的头部以及触角和口器上的化学感受器进行扫描观察并描述。［结果］ 豇豆荚螟幼虫的头式为下口式；头上具有单眼、触角、感觉刚毛、上唇、上颚、下颚、下唇、吐丝器；幼虫的触角上存在栓形、锥形和毛形3种感受器；口器附肢下颚须上有8个锥形感受器；下唇须在第2、3节上各着生有1个锥形感受器。［结论］ 豇豆荚螟幼虫头部共有4种类型的感受器：毛形感受器（Str）、锥形感受器（Sb）、小锥形感受器（Sbs）和栓形感受器（Ss），各自担负着不同的功能。

Observation on the head and chemoreceptors of Maruca vitrata (Lepidoptera: Crambidae) larvae

Objective] The morphology,amount and distribution of chemoreceptors on the head of Maruca vitrata(Fabricius) were observed,which will provide a basis for its functional and mechanical research.Method] The chemoreceptors on antennae and mouthparts of the 5th instar larvae of M.vitrata were observed with scanning electron microscopy.Result] The head structure type of the larvae was hypognathous.Three kinds of chemoreceptors were found on antennae of the larvae,namely sensilla styloconicum,sensilla basiconi...