title: Prodigiosin produced by Serratia marcescens NMCC46 as a mosquito larvicidal agent against Aedes aegypti and Anopheles stephensi.
abstract: Microbial control agents offer alternatives to chemical pest control as they can be more selective than chemical insecticides. The present study evaluates the mosquito larvicidal potential of microbial pigment prodigiosin produced by Serratia marcescens NMCC46 against Aedes aegypti and Anopheles stephensi. The pigment of S. marcescens NMCC46 was extracted after 24 h from mannitol containing nutrient broth media. The effects of crude extracted pigment on the growth, survival, development, and other life cycle aspects were studied. The LC(50) and LC(90) values of second, third, and fourth instars of A. aegypti (LC(50) = 41.65, 139.51, 103.95; LC(90) = 117.81, 213.68, 367.82) and A. stephensi (LC(50) = 51.12, 105.52, 133.07; LC(90) = 134.81, 204.45, 285.35) were determined. At higher concentration (500 ppm), mortality starts within first 6 h of exposure. More than 50% mortality occurs within the first 24 h. The overall observed effects against A. aegypti and A. stephensi larvae after 48 h were increasing percent survival larvae, survival pupation, adult emergence with decreasing crude pigment extract concentration. These ensure that the resultant mosquito population reduction is substantial even where the larvicidal potential is minimal. The UV (λ (max) = 536 nm), TLC (Rf = 0.9), HPLC, and FTIR analysis of crude pigment shows the presence of prodigiosin as active compound. Thus, the active compound produced by this species would be more useful against vectors responsible for diseases of public health importance. This is the first report on mosquito larvicidal activity of prodigiosin produced by Serratia species.
authors: School of Life Sciences, North Maharashtra University, Post Box - 80, Jalgaon, 425001 Maharashtra, India.
authors: Chandrashekhar D
authors: CD
authors: Patil
authors: Satish V
authors: SV
authors: Patil
authors: Bipinchandra K
authors: BK
authors: Salunke
authors: Rahul B
authors: RB
authors: Salunkhe
mesh_terms: D000330:Aedes / Q000187:drug effects* / Q000254:growth & development; D000818:Animals; D000852:Anopheles / Q000187:drug effects* / Q000254:growth & development; D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000494:pharmacology*; D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D045424:Complex Mixtures / Q000737:chemistry; D004305:Dose-Response Relationship, Drug; D007300:Insect Control / Q000379:methods*; D007303:Insect Vectors / Q000187:drug effects* / Q000254:growth & development; D007305:Insecticide Resistance; D007306:Insecticides / Q000494:pharmacology; D007814:Larva / Q000187:drug effects* / Q000254:growth & development; D007928:Lethal Dose 50; D011353:Prodigiosin / Q000032:analysis / Q000494:pharmacology*; D011679:Pupa / Q000187:drug effects* / Q000254:growth & development; D012706:Serratia marcescens / Q000737:chemistry / Q000378:metabolism*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D000900:Anti-Bacterial Agents; D045424:Complex Mixtures; D007306:Insecticides; D011353:Prodigiosin