致倦库蚊感染堆集噬虫霉的症状及其病原形态观察  

Symptoms and pathogen morphology of Culex pipiens quinquefasciatus infected with Entomophaga conglomerata

作　　者：贾春生[1] 

机构地区：[1]韶关学院英东生物工程学院农业科学系,广东韶关512005

出　　处：《中国媒介生物学及控制杂志》2010年第4期343-345,共3页Chinese Journal of Vector Biology and Control

摘　　要：目的描述致倦库蚊感染堆集噬虫霉的症状及其形态特征,为控制蚊虫提供科学依据。方法醋酸地衣红染色法观察堆集噬虫霉的形态,分别显微测量分生孢子、细胞核和分生孢子梗直径,并摄影。结果感染堆集噬虫霉的致倦库蚊成虫漂浮于水面上,虫体向腹面弯曲,多呈"C"字形,双翅向侧后张开,约成90°,蚊尸腹部膨大,从节间膜长出子实层,在各节形成明显的白环。堆集噬虫霉的分生孢子梗不分支,初生分生孢子梨形至圆形,单囊壁,多核,易被醋酸地衣红染色。休眠孢子、假囊体和假根未见。结论堆集噬虫霉感染致倦库蚊未见文献报道,该菌对致倦库蚊具有控制潜力。Objective To describe the symptoms and morphologic characteristics of Culex pipiens quinquefasciatus infected with Entomophaga conglomerata,providing the basis for mosquito control.Methods Samples were stained with aceto-orcein for observation of the morphology of E.conglomerata.Microscopic measurements of the diameters of conidia,nuclei and conidiophores were made followed by photography.Results Adults of Cx.pipiens quinquefasciatus infected with E.conglomerata floated on water and ventrally bent to form a C shape with wings laterally open at about 90°.The abdomen of corpses swelled with distinct white rings due to formation of hymenium from the intersegmental membranes.Branches were not present in the conidiophores of E.conglomerata;the primary conidia were pyriform to round,single-wall,multi-core,and easily stained by aceto-orcein.Dormant spores,pseudocysts and rhizoids were not observed.Conclusion Though not previously reported,the infection of E.conglomerata in Cx.pipiens quinquefasciatus may be potentially essential to the control of this mosquito species.

关 键 词：致倦库蚊 堆集噬虫霉 虫霉目 昆虫病原真菌 

分 类 号：R384.1[医药卫生—医学寄生虫学]