Journal of Biological Control

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Evaluation of Metarhizium (Nomuraea) rileyi (Farlow) Samson isolates against Spodoptera litura F. under in vitro conditions


Affiliations
1 Department of Entomology, S. V. Agricultural College, Tirupati – 517502, Andhra Pradesh, India
2 Department of Entomology, IFT, RARS, Tirupati, Andhra Pradesh, India
3 Department of Plant Pathology, S. V. Agricultural College, Tirupati – 517502, Andhra Pradesh, India
4 Department of Statistics and Computer Applications, S. V. Agricultural College, Tirupati – 517502, Andhra Pradesh, India
 

Fifteen isolates of Metarhizium (Nomuraea) rileyi collected from field populations of Spodoptera litura (F.) and Spodoptera frugiperda J. E. Smith in different crops across different agroclimatic zones of Andhra Pradesh were evaluated for their pathogenicity against third instar larvae of S. litura at the Biocontrol Laboratory, Regional Agricultural Research Station, Tirupati, India. Virulence was tested by applying conidial suspension @ 1x107 spores ml–1 on the groundnut leaves on which the larvae were allowed to feed. The cumulative mean larval mortality to the extent of 75.00 to 85.00% was observed with isolates viz. Nr.Yj.KZ, Nr.Dp.KZ, Nr.Rt.KZ, Nr.Rd.HATZ, Nr.Pp. HATZ and Nr.Cp.HATZ whereas the isolates Nr.Ik.SRZ, Nr.Vg.SRZ, Nr.Pl.SZ, Nr.Ag.SZ, Nr.Np.SRZ, Nr.Rp.SZ, Nr.Rg.NCZ, Nr.Hv.SRZ and Nr.Cd.SZ recorded 65.00 to 73.33% mortality.


Keywords

Agroclimatic zones, larval mortality, Metarhizium rileyi, pathogenicity, Spodoptera litura
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  • Evaluation of Metarhizium (Nomuraea) rileyi (Farlow) Samson isolates against Spodoptera litura F. under in vitro conditions

Abstract Views: 219  |  PDF Views: 202

Authors

Y. Peeru Saheb
Department of Entomology, S. V. Agricultural College, Tirupati – 517502, Andhra Pradesh, India
K. Manjula
Department of Entomology, S. V. Agricultural College, Tirupati – 517502, Andhra Pradesh, India
K. Devaki
Department of Entomology, IFT, RARS, Tirupati, Andhra Pradesh, India
R. Sarada Jaya Lakshmi
Department of Plant Pathology, S. V. Agricultural College, Tirupati – 517502, Andhra Pradesh, India
B. Ravindra Reddy
Department of Statistics and Computer Applications, S. V. Agricultural College, Tirupati – 517502, Andhra Pradesh, India
N. C. Venkateswarlu
Department of Entomology, S. V. Agricultural College, Tirupati – 517502, Andhra Pradesh, India

Abstract


Fifteen isolates of Metarhizium (Nomuraea) rileyi collected from field populations of Spodoptera litura (F.) and Spodoptera frugiperda J. E. Smith in different crops across different agroclimatic zones of Andhra Pradesh were evaluated for their pathogenicity against third instar larvae of S. litura at the Biocontrol Laboratory, Regional Agricultural Research Station, Tirupati, India. Virulence was tested by applying conidial suspension @ 1x107 spores ml–1 on the groundnut leaves on which the larvae were allowed to feed. The cumulative mean larval mortality to the extent of 75.00 to 85.00% was observed with isolates viz. Nr.Yj.KZ, Nr.Dp.KZ, Nr.Rt.KZ, Nr.Rd.HATZ, Nr.Pp. HATZ and Nr.Cp.HATZ whereas the isolates Nr.Ik.SRZ, Nr.Vg.SRZ, Nr.Pl.SZ, Nr.Ag.SZ, Nr.Np.SRZ, Nr.Rp.SZ, Nr.Rg.NCZ, Nr.Hv.SRZ and Nr.Cd.SZ recorded 65.00 to 73.33% mortality.


Keywords


Agroclimatic zones, larval mortality, Metarhizium rileyi, pathogenicity, Spodoptera litura

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DOI: https://doi.org/10.18311/jbc%2F2021%2F26885