摘要
采用光学显微镜研究了枣球蜡蚧Eulecaniumgiganteum (Shinji)雄虫在不同发育期的形态特征。结果表明 :该虫雄性完成其生活史需经历初孵若虫、固定若虫、预蛹和蛹、雄成虫 4个阶段。初孵的 1龄若虫为扩散活动期 ,虫体具有发达的单眼、触角和 3对胸足 ,便于寻找寄生场所 ,但泌蜡腺体很少。 1龄后期和 2龄若虫为固定取食期 ,虫体缘毛粗大 ,泌蜡腺体很多 ,蜡泌物在虫体背面堆积成龟背状蜡壳 ,自我保护性很强。预蛹和蛹不再取食 ,虫体隐藏在白色的半透明蜡壳内。与若虫相比 ,体形变化很大 ,预蛹出现翅芽 ,而其它各器官退化 ,眼无 ,触角和足短小且分节不显。到蛹期 ,翅芽、触角和足明显长大 ,并出现感觉毛。成虫期为活动交配期 ,头部出现发达的 5对单眼 ,触角 1 0节 ,密布各种刚毛等感觉器。前翅和足发育完好。
Morphological characteristics of the male scale insect, Eulecanium giganteum(Shinji) was studied with the aid of a light microscope. Male E. giganteum must be going through four developmental stages: hatching nymph, fixed nymph, pre-pupa and pupa, and adult. The first stage is the dispersal and active phase and these nymphs are crawlers. They have developed eyes, antennae and three pairs of legs so that they can move to hosts. However, the wax glands on their body surface are very few. In the next developmental phase, The end of first instar and second instar nymphs are fixed and feed on twigs and/or leaves. During this period, the margins of the body are densely setose. There are many wax glands which result in forming a turtle-like wax shell on the dorsal surface. The pre-pupa and pupa no longer feed and are concealed in a white, semi-transparent wax cover. At this stage the morphological characters of the scale insect differs greatly from those at the nymph stage. The pre-pupa's wing buds appear, and other organs are reduced, for example, eyes are absent and antennae and legs are short, and segmentations are indistinct. In the pupal stage, the wing buds, antennae and legs are prolonged and covered with abundant sensory hairs. In the adult stage, the sensory and motor organs become well developed. There are 5 pairs of ocelli around the head. Antennae become 10-segmented and with several kinds of sensilla. The wings and legs are strong.
出处
《昆虫知识》
CSCD
北大核心
2004年第1期60-64,共5页
Entomological Knowledge
基金
国家自然科学基金资助项目 (30 2 710 87)
山西省自然科学基金项目 (2 0 0 310 6 5 )
关键词
蚧科
枣球蜡蚧
雄虫
形态特征
Coccidae, Eulecanium giganteum, male scale insect, morphological characteristics
