泽兰实蝇内生殖器官的结构及其发育状况

【背景】泽兰实蝇属双翅目实蝇科，是杂草紫茎泽兰的重要专性天敌。该蝇幼虫可蛀入紫茎泽兰内部形成虫瘿，有效控制紫茎泽兰的扩散，许多国家都利用泽兰实蝇控制紫茎泽兰的危害。【方法】通过光学显微法观察了泽兰实蝇成虫内生殖器官的结构及其发育动态。【结果】雌性泽兰实蝇的内生殖系统主要由卵巢、输卵管、受精囊、雌性附腺等器官组成，雄性生殖系统由精巢、输精管、雄性附腺、射精管组成。在成虫发育过程中，雌虫卵巢的长度在第4日龄时达最大值，宽度在1日龄时达最大值，与其他日龄相比有显著差异，雌性附腺及受精囊的大小在各日龄间无显著差异；雄虫精巢长度在4日龄时达到最大，宽度在2日龄时达最大，且不同日龄间也有显著差异，而雄性附腺的大小在不同龄期间无显著差异。【结论与意义】本文阐明了泽兰实蝇的内生殖系统结构与发育状况，这有助于为提高泽兰实蝇人工繁殖效率及生物防治效果奠定理论基础。

Structure and development of internal reproductive organs in Procecidochares utilis Stone (Diptera: Tephritidae)

【Background】Procecidochares utilisStone （Diptera： Tephritidae） is an important obligate enemy of Eupatorium adenophorum Spreng.. The larvae of flies can bore into the E.adenophorum leading to gall formation, which can effectively restrict the dispersal of E.adenophorum. It is considered an effective biological agent to E.adenophorum. Many countries have used this insect to control the damage caused by E.adenophorum. 【Method】The structure and development of internal reproductive organs in adult P.utilis were extensively analyzed by optical microscopy method. 【Result】The internal reproductive organs of female adult P.utilis were composed of ovaries, lateral oviduct, spermatheca, female accessory glands; and male internal reproductive organs were composed of testes, vasa deferentia, male accessory glands and ejaculatory duct. During the development, the maximal length and width of ovaries were reached at 4 and 1 day old respectively. While the size of the female accessory glands and spermatheca did not vary significantly among females of different ages, length and width did. The maximal length and width of testes were reached at 4 and 2 day old respectively. Similar to the females, size of the male accessory glands did not significantly vary among age groups but length and width showed significant variation. 【Conclusion and significance】The study examined the structure and development dynamics of internal reproductive system in P.utilis. For the results can be useful to improve the breeding efficiency of P.utilis and the effects of biological control against E.adenophorum.