Influence of Temperature on the Virulence of the Entomopathogenic Nematode Steinernema feltiae Filipjev (DD-136 Strain) to Spodoptera litura (Fab.) and Heliothis armigera (Hbn)


  • Tamil Nadu Agricultural University, Department of Nematology, Coimbatore, India


The virulence of Steinernema feltiae Filipjev to Spodoptera litura Fab. (Noctuidae: Lepidoptera) and Heliothis armigera Hbn. (Noduldae: Lepidoptera) was reduced as the temperature lnaeased from 24 to 30 °C. Between the two insects, H. armigera was more susceptible than S. litura. The LC50 values for both the insects were higher at the final instar when compared to the third instar.


Entomopathogenic nematode, Steinernema feltiae, Heliothis armigera, Spodoptera litura.

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