›› 2008, Vol. 51 ›› Issue (5): 504-508.

• 研究论文 • 上一篇    下一篇



  • 出版日期:2010-07-27 发布日期:2008-05-20
  • 通讯作者: 漆一鸣

Histological effects of fenoxycarb on the Oriental rat flea, Xe nopsylla cheopis (Siphonaptera: Pulicidae)

ZHANG Ying-Chun   

  • Online:2010-07-27 Published:2008-05-20


【目的】通过研究苯醚威对印鼠客蚤 Xenopsylla cheopis (Rothschild,1903)的早 3 龄幼虫和未吸血新羽化成虫的组织学变化,探讨其灭蚤机理,为鼠疫媒介蚤种的防治提供基础资料。【方法】以微量点滴法将苯醚威施药于印鼠客蚤早3龄幼虫和未吸血新羽化成虫,采用组织学、显微摄影及统计学方法观察组织变化。【结果】经苯醚威作用后,印鼠客蚤的早 3 龄幼虫的表皮增厚、卵巢芽生殖细胞萎缩、睾丸芽精原细胞间质减少;未吸血新羽化成虫的睾丸塞消失快、唾液腺细胞破坏严重、中肠上皮细胞萎缩。【结论】(1)苯醚威通过干扰印鼠客蚤幼虫的变态,引起幼虫表皮、生殖芽异常改变,不能发育为成虫而死亡;(2)苯醚威可加速印鼠客蚤新羽化雄性成虫的睾丸塞吸收;(3)苯醚威可破坏印鼠客蚤新羽化成虫的唾液腺细胞,并引起中肠上皮细胞萎缩。

关键词: 苯醚威, 印鼠客蚤, 组织学, 昆虫生长调节剂, 灭蚤机理

Abstract: Objective To provide the fundamental dat a of controlling the flea species of media of plague and to probe insecticidal m echanisms of fenoxycarb to the early third instar larvae and the newly emerged a dults of Xenopsylla cheopis (Rothschild, 1903) through histological observations. Methods The early third instar larvae and the newly emerged adults of X. cheopis were treated with fenoxycarb by microliter syringes. The changes of tissues were determined by the methods of histology, microphotographics and statistics. Results The cuticula of the third instar larvae of X. cheopis treated with fenoxycarb were thicker, the reproductive cells of ovarial rudiments became atrophied, and interstitial tissues of sperma gonia became less. The testicular plug of the newly emerged adults of X. cheopis treated with fenoxycarb disappeared faster than treated with a cetone, the salivary gland cells were damaged seriously, and the midgut epitheli a become atrophied. Conclusions (1) Fenoxycarb caused the death of X. cheopis larvae by disturbance of metamorphosis and changes in cuticula, ovarial rudiments and testicular rudiments. (2) Fenoxycarb escalated disappearance of testicular plug in the newly emerged male adults.   (3) Fenoxycarb caused the death of the newly emerged adults of X. cheopis by damage of salivary gland cells and atrophy of midgut epithelia.10 Refs. In Chinese

Key words: Fenoxycarb, Xenopsylla cheopis, histology, insect growth regulator, insecticidal mechanism