云南木蠹象成虫外部形态观察

Observation of the Morphology of Pissodes yunnanesis

云南木蠹象Pissodes yunnanensis Langoret Zhang属鞘翅目Coleoptera象虫科Curculionidae木蠹象属Pis-sodes,是危害云南松Pinus yunnanensis Franchet的主要蛀干害虫之一。详细记述了云南木蠹象雌、雄成虫的外部形态特征,并首次用扫描电镜观察了它们的头部及前翅的细微结构。电镜下可见雌、雄成虫头部额区具圆刻点并具毛,复眼无显著差异,复眼中部的小眼面皆呈六边形,前翅背面有3类毛形附属物,其中1类为灰色,另2类为白色;雌、雄成虫在前翅腹面端部有很明显的区别。

Pissodes yunnanesis, belonging to Curculionidae of Coleoptera, is one of the main pests of Pinus yunnanensis. The morphological characteristics of both adult female and male Pissodes yunnanesis were detailed characterized in this paper. The head and forewings were observed with SEM for the first time. The results showed that the frons of adult females and males have a circle punctum with hairs, the compound eyes exhibit no difference between males and females, the facet in the middle of the compound eye are all hexagonal. In addition, 3 kinds of wool type adnexa, one gray and the other two white, attached to the back of the forewings. The end in ventcr of forewing of adult has obvious difference between males and females.