Mosquito larvicidal efficacy of extracellular secondary metabolitics of soil actinomycetes again the malaria vector,Anopheles stephensi liston 
(Diptera: Culicidae)

Abstract :

Decolourization of potentiality of the isolates of actinobacteria obtained from the soil polluted with textile dye effluents and three synthetic dyes namely red M5B, orange M2R and blue G was determined. Twenty five isolates of actinobacteria were isolated from the polluted samples of soil collected from Karur, Tamil Nadu. From the 25 isolates screened to determine the decolorization potentiality, only seven isolates were selected for further studies. The isolates of Nocardiopsis sp. K2 and Streptomyces sp. K6 showed more percentage loss of intensity of colour against red M5B than orange M2R and blue G. Effect of pH, temperature, incubation period, culture media, carbon and nitrogen sources was optimized for suitable conditions for maximal decolourization.