南洋臀纹粉蚧雌成虫主要器官及其蜡泌物的扫描电镜观察

为明确南洋臀纹粉蚧Planococcus lilacinus(Cockerell)雌成虫及其蜡泌物的结构特征,利用扫描电镜观察该虫体表主要器官、蜡质及泌蜡腺体的超微结构.结果表明:南洋臀纹粉蚧雌成虫外覆白色粉状厚蜡被,体缘具18对蜡棒,触角8节、口器和足发达且分布有不同长度的毛形和刺形感受器,眼为单眼,腹脐和背孔唇形、发达;体表蜡质包含带状蜡丝、空心管状蜡丝和月牙形蜡丝,由三格腺和刺孔群分泌的带状蜡丝大量分布于整个虫体,由管状腺分泌的空心管状蜡丝主要分布于虫体腹部腹面和体缘,由多格腺分泌的月牙形蜡丝主要分布于虫体腹部腹面.研究结果初步揭示了南洋臀纹粉蚧雌成虫体表主要器官、蜡质及泌蜡腺体的超微结构特征,可为研究该虫搜索寄主、寻找配偶、群集为害、抵御逆境和传播扩散等行为活动提供支持.

Scanning electron microscope observations of main organs and wax secretions of Planococcus lilacinus female adult

To definite the structural features of Planococcus lilacinus (Cockerell) female adult and its wax secretions, the ultrastructure of main organs, wax filaments and wax glands on the body surface of this mealybug were observed by using scanning electron microscopy. Results showed that the body surface of P. lilacinus female adult was heavily covered by thick white wax filaments, with eighteen pairs of wax rod on the body margins. This mealybug had eight antennal segments, strong mouthparts and legs. There were different length sensilla trichodeas and sensilla chaeticas on the antennas, mouthparts, legs. The eyes was ocelli, while the circulus and ostioles were lip-shaped and developed. The wax filaments including ribbon-shaped wax filaments, hollow wax tubes and crescent-shaped wax filaments. The ribbon-shaped wax filaments were secreted by trilocular pores and cerarius which widely distributed on the whole body surface, and the hollow wax tubes were secreted by tubular ducts glands which mainly distributed on the abdominal venter and body margins, while the crescent-shaped wax filaments were secreted by multilocular pores which mainly distributed on the abdominal venter, respectively. In this study, the ultrastructural features of main organs, wax filaments and wax glands on the body surface of P. lilacinus female adult were preliminary definited, it could be provide support to the ethology research of this mealybug, including foraging, mating, swarming, defense and spread.