Larvicidal potentiality, longevity and fecundity inhibitory activities of Bacillus sphaericus (Bs G3-IV) on vector mosquitoes, Aedes aegypti and Culex quinquefasciatus

  • Arjunan Nareshkumar Department of Zoology, Bharathiar University, Coimbatore, India.
  • Kadarkarai Murugan | kmvvkg@gmail.com Department of Zoology, Bharathiar University, Coimbatore, India.
  • Indra Baruah Defence Research and Development Organization, Defence Research Laboratory, Assam, India.
  • Pari Madhiyazhagan Department of Zoology, Bharathiar University, Coimbatore, India.
  • Thiyagarajan Nataraj Department of Zoology, Bharathiar University, Coimbatore, India.

Abstract

Intervention measures to control the transmission of vector-borne diseases include control of the vector population. In mosquito control, synthetic insecticides used against both the larvae (larvicides) and adults (adulticides) create numerous problems, such as environmental pollution, insecticide resistance and toxic hazards to humans. In the present study, a bacterial pesticide, Bacillus sphaericus (Bs G3-IV), was used to control the dengue and filarial vectors, Aedes aegypti and Culex quinquefasciatus. Bacillus sphaericus (Bs G3-IV) was very effective against Aedes aegypti and Culex quinquefasciatus, showing significant larval mortality. Evaluated lethal concentrations (LC50 and LC90) were age-dependent, with early instars requiring a lower concentration compared with later stages of mosquitoes. Culex quinquefasciatus was more susceptible to Bacillus sphaericus (Bs G3-IV) than was Aedes aegypti. Fecundity rate was highly reduced after treatment with different concentrations of Bacillus sphaericus (Bs G3-IV). Larval and pupal longevity both decreased after treatment with Bacillus sphaericus (Bs G3-IV), total number of days was lower in the B. sphaericus treatments compared with the control. Our results show the bacterial pesticide Bacillus sphaericus (Bs G3-IV) to be an effective mosquito control agent that can be used for more integrated pest management programs.

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Bacillus sphaericus (Bs G3-IV), Aedes aegypti, Culex quinquefasciatus, fecundity, mosquito longevity
Published
2012-12-16
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Supporting Agencies
Defence Research & Development Laboratory (DRDL), Defence Research & Development Organization, Ministry of Defence, Govt. of India
Keywords:
Bacillus sphaericus, Aedes aegypti, Culex quinquefasciatus, fecundity and Mosquito longevity
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How to Cite
Nareshkumar, A., Murugan, K., Baruah, I., Madhiyazhagan, P., & Nataraj, T. (2012). Larvicidal potentiality, longevity and fecundity inhibitory activities of Bacillus sphaericus (Bs G3-IV) on vector mosquitoes, Aedes aegypti and Culex quinquefasciatus. Journal of Entomological and Acarological Research, 44(3), e15. https://doi.org/10.4081/jear.2012.e15