Research Article Open Access

Synthetic Pyrethroid Resistance in Field Strains of Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae) in Tamil Nadu, South India

P. Duraimurugan1 and A. Regupathy1
  • 1 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore-641 003, India

Abstract

Resistance to synthetic pyrethroids was diagnosed in the field population of American bollworm, Helicoverpa armigera (Hubner) from Coimbatore, Tamil Nadu, South India during 2003-2004 cropping seasons. A Discriminating Dose (DD) bioassay technique was used to monitor fortnightly changes in resistance at Coimbatore where number of crops served as host plants for this pest. The resistance level of various synthetic pyrethroids to DDs varied from 80.0 to 96.4%. The extent of resistance in terms of percent survival was 88.1-96.4, 87.2-94.3, 87.0-94.0, 84.3-94.2 and 80.0-91.8% for cypermethrin, fenvalerate, deltamethrin, lambda-cyhalothrin and beta-cyfluthrin, respectively.

American Journal of Applied Sciences
Volume 2 No. 7, 2005, 1146-1149

DOI: https://doi.org/10.3844/ajassp.2005.1146.1149

Submitted On: 26 February 2005 Published On: 31 July 2005

How to Cite: Duraimurugan, P. & Regupathy, A. (2005). Synthetic Pyrethroid Resistance in Field Strains of Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae) in Tamil Nadu, South India. American Journal of Applied Sciences, 2(7), 1146-1149. https://doi.org/10.3844/ajassp.2005.1146.1149

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Keywords

  • Insecticide resistance
  • Helicoverpa armigera
  • Coimbatore
  • Tamil Nadu
  • South India