关键词: 致倦库蚊, 堆集噬虫霉, 虫霉目, 昆虫病原真菌

Abstract:

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.

Key words: Culex pipiens quinquefasciatus, Entomophaga conglomerata, Order entomophthoralean, Insect pathogenic fungi