International Journal of Plant Sciences

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Evaluation of Oil Formulations of Nomuraea rileyi (Farlow) Samson against Spodoptera litura under Laboratory Conditions


Affiliations
1 Department of Entomology, S.V. Agricultural College (A.N.G.R.A.U.), Tirupati (A.P.), India
     

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Three oil formulations of entomopathogenic fungus Nomuraea rileyi were evaluated for their efficacy along with crude formulation against third instar Spodoptera litura during 2011-2012 at the Department of Entomology, S.V. Agricultural College, Tirupati. Mean larval mortalities of 96.67, 93.33, 86.67 and 76.67 per cent, respectively were recorded with groundnut, sunflower, coconut oil based formulations and crude formulation of N. rileyi at highest concentration i.e., 1 x 108 spores ml-1 at 10 DAT. More than 70 per cent larval mortalities of S. litura were obtained with the concentrations above 1 x 106 spores per ml in case of groundnut oil and sunflower oil based formulations. The mortalities gradually reduced with concentration showing the least at 1 x 102 spores ml-1. Incubation period, was in negative correlation with the concentration of N. rileyi in all the formulations. Pupal mortalities and malformed adults emergence showed positive association with concentration of N. rileyi against S. litura larvae.

Keywords

N. rileyi, Oil Formulation, Lab Evaluation, S. litura.
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  • Babi Neeraja, D. (2008). Studies on mass production and pathogenicity of Nomuraea rileyi (Farlow) Samson : An entomopathogenic fungus. M.Sc. (Ag.) Thesis, Acharya N.G. Ranga Agricultural University, Hyderabad, A.P. (INDIA).

  • Gundannavar, K.P. (2001). Utilization of entomopathogenic fungi in the management of Helicoverpa armigera (Hubner) in pigeonpea ecosystem. M.Sc. (Ag.) Thesis, University of Agricultural Sciences, Dharwad, KARNATAKA (INDIA).

  • Hedgecock, S., Moore, D., Higgins, P.M. and Prior, C. (1995). Influence of moisture content on temperature tolerance and storage ofMetarhizium flavoviridae conidia in an oil formulation. Biocontrol Sci.& Technol., 5: 371-377.

  • Kamala Jayanthi, P.D.K and Padmavathamma, K. (1996). Effect of microbial agents on different developmental stages of tobacco caterpillar, Spodoptera litura. Indian J. Plant Protec., 24(1): 102-109.

  • Lalitha, C. (2007). Studies on the Entomopathogenic fungus Nomuraea rileyi (Farlow) samson with special reference to Spodoptera litura Fabricius. M.Sc. (Ag.) Thesis, Acharya N.G. Ranga Agricultural University, Hyderabad (A.P.) INDIA.

  • Lopez, L.C.C. and Boucias, D.G. (1994). Studies on the cellular reactions of Spodoptera exigua larvae infected with the fungus Nomuraea rileyi. J. Invertebrate Pathol., 63(1): 101-102.

  • Nagaraja, S.D. (2005). Effect of formulations of Nomuraea rileyi and spray equipments in the management of tobacco caterpillar in groundnut and pod borer in chickpea ecosystem. M.Sc (Ag.) Thesis, University of Agricultural Sciences, Dharwad, KARNATAKA (INDIA).

  • Prior, C., Carey, M., Moore, D. and Bateman, R.P. (1988). The enhanced infectivity of Metarhizum flavoviridae in oil formulations to desert locusts at low humidities. Ann. Appl. Biol., 122:145-152.

  • Ramakrishnan, N., Saxena, V. S. and Dhingra, S. (1983). Insecticide resistance in the population of Spodoptera litura (Fab.) in Andhra Pradesh. Pesticides, 18: 23-24.

  • Ramegowda, G.K. (2005). Aerobiology, epizootiology and utilization of Nomuraea rileyi (Farlow) Samson. Ph. D. Thesis, University of Agricultural Sciences, Dharwad, KARNATAKA (INDIA).

  • Siva Sankaran, P., Easwaramoorthy, S. and David, H. (1990). Pathogenicity and host range of Beauveria bassiana a fungal pathogen of Chilo infuscatellus Snellen. J. Biol. Control, 4 (1) : 48-51.

  • Siva Sankaran, P., Easwaramoorthy, S. and Deniel, H. (1998). Influence of temperature and RH on the growth, sporulation and pathogenicity of Nomuraea rileyi. J. Biol. Control, 12(1): 71-76.

  • Vimaladevi, P.S., Prasad, Y.G. and Chowdary, A. (2002). Effect of drying and formulation of conidia on virulence of the entomofungal pathogen Nomuraea rileyi (Farlow) Samson. J. Biol. Control, 16(1): 43-48.


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  • Evaluation of Oil Formulations of Nomuraea rileyi (Farlow) Samson against Spodoptera litura under Laboratory Conditions

Abstract Views: 540  |  PDF Views: 2

Authors

T. Sharmila
Department of Entomology, S.V. Agricultural College (A.N.G.R.A.U.), Tirupati (A.P.), India
K. Manjula
Department of Entomology, S.V. Agricultural College (A.N.G.R.A.U.), Tirupati (A.P.), India
T. Murali Krishna
Department of Entomology, S.V. Agricultural College (A.N.G.R.A.U.), Tirupati (A.P.), India

Abstract


Three oil formulations of entomopathogenic fungus Nomuraea rileyi were evaluated for their efficacy along with crude formulation against third instar Spodoptera litura during 2011-2012 at the Department of Entomology, S.V. Agricultural College, Tirupati. Mean larval mortalities of 96.67, 93.33, 86.67 and 76.67 per cent, respectively were recorded with groundnut, sunflower, coconut oil based formulations and crude formulation of N. rileyi at highest concentration i.e., 1 x 108 spores ml-1 at 10 DAT. More than 70 per cent larval mortalities of S. litura were obtained with the concentrations above 1 x 106 spores per ml in case of groundnut oil and sunflower oil based formulations. The mortalities gradually reduced with concentration showing the least at 1 x 102 spores ml-1. Incubation period, was in negative correlation with the concentration of N. rileyi in all the formulations. Pupal mortalities and malformed adults emergence showed positive association with concentration of N. rileyi against S. litura larvae.

Keywords


N. rileyi, Oil Formulation, Lab Evaluation, S. litura.

References