Studies on Fungal Cultural Filtrates against AdultCulex quinquefasciatus(Diptera: Culicidae) a Vector of Filariasis

Abstract

Entomopathogenic fungi have significant potential to control mosquito population. The culture filtrates ofFusarium oxysporum, Lagenidium giganteum, Trichophyton ajelloi,andCulicinomyces clavisporuswere evaluated against adults ofCx. quinquefasciatus. The culture filtrates were obtained by filtering the broth through Whatman-1 filter paper. These culture filtrates ofC. clavisporushave been found significantly pathogenic with LC50-2.5, LC90-7.24, and LC99-8.7 ML, respectively, after exposure of 24 h. However, the culture filtrates when were combined, in ratios 1 : 1 : 1 ofFusarium oxysporum, Lagenidium giganteum, Trichophyton ajelloithe mortalities were significantly increased. The LC50-3.71, LC90-8.12, and LC99-11.48 were significantly recorded after exposure of 10 hrs. Similarly, the culture filtrates ofT. ajelloi, Culicinomyces clavisporus,andL. giganteumhave been combined in ratios 1 : 1 : 1. Similarly the LC50-1.94, LC90-4, and LC99-6.16 ML Were recorded after exposure of 10 hrs. The results of present study show promise for the use of selected fungal metabolites for control ofCx. quinquefasciatusin the Laboratory.