Tags

Type your tag names separated by a space and hit enter

Evaluation of pirimiphos-methyl (50% EC) against the immatures of Anopheles stephensi/An. culicifacies (malaria vectors) and Culex quinquefasciatus (vector of bancroftian filariasis).
J Vector Borne Dis. 2004 Mar-Jun; 41(1-2):10-6.JV

Abstract

BACKGROUND & OBJECTIVES

In India, temephos and fenthion are used as larvicides in fresh and polluted waters. Since use of same insecticide may precipitate resistant, as an alternative bioefficacy of pirimiphos-methyl--an organophosphorus insecticide was evaluated against immatures of Anopheles and Culex species in different breeding habitats in District Ghaziabad (U.P.) and Goa.

METHODS

Laboratory bioassays were carried out using standard WHO procedure. LC50 and LC90 were calculated using Probit analysis. Abbott's formula was used to calculate per cent corrected mortality in laboratory exposures while, Mulla's formula was applied for calculating per cent reduction in mosquito immatures under field conditions.

RESULTS

Pirimiphos-methyl was found to be most effective against larvae of An. stephensi followed by An. culicifacies and Cx. quinquefasciatus. The LC50 and LC90 values against three species were 0.023, 0.032 and 0.04 ppm; and 0.045, 0.057 and 0.114 ppm respectively. In field, pirimiphos-methyl @ 200 g a.i./ha against Anopheles species and @ 300 g a.i./ha against Culex species can produce > 80% reduction in density of immatures up to one week in different habitats. Pirimiphos-methyl < 0.25 ppm is not toxic to fish.

INTERPRETATION & CONCLUSION

Pirimiphos-methyl is more effective against anophelines in clean water than culicines in polluted water. This larvicide should not be used at a concentration above 0.25 ppm in habitats harbouring the larvivorous fish.

Authors+Show Affiliations

Alalwria Research Centre (ICMR), 20, Madhuban, Delhi, India. ansari@ndf.vsnl.net.inNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

15332481

Citation

Ansari, M A., et al. "Evaluation of Pirimiphos-methyl (50% EC) Against the Immatures of Anopheles stephensi/An. Culicifacies (malaria Vectors) and Culex Quinquefasciatus (vector of Bancroftian Filariasis)." Journal of Vector Borne Diseases, vol. 41, no. 1-2, 2004, pp. 10-6.
Ansari MA, Mittal PK, Razdan RK, et al. Evaluation of pirimiphos-methyl (50% EC) against the immatures of Anopheles stephensi/An. culicifacies (malaria vectors) and Culex quinquefasciatus (vector of bancroftian filariasis). J Vector Borne Dis. 2004;41(1-2):10-6.
Ansari, M. A., Mittal, P. K., Razdan, R. K., Dhiman, R. C., & Kumar, A. (2004). Evaluation of pirimiphos-methyl (50% EC) against the immatures of Anopheles stephensi/An. culicifacies (malaria vectors) and Culex quinquefasciatus (vector of bancroftian filariasis). Journal of Vector Borne Diseases, 41(1-2), 10-6.
Ansari MA, et al. Evaluation of Pirimiphos-methyl (50% EC) Against the Immatures of Anopheles stephensi/An. Culicifacies (malaria Vectors) and Culex Quinquefasciatus (vector of Bancroftian Filariasis). J Vector Borne Dis. 2004 Mar-Jun;41(1-2):10-6. PubMed PMID: 15332481.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluation of pirimiphos-methyl (50% EC) against the immatures of Anopheles stephensi/An. culicifacies (malaria vectors) and Culex quinquefasciatus (vector of bancroftian filariasis). AU - Ansari,M A, AU - Mittal,P K, AU - Razdan,R K, AU - Dhiman,R C, AU - Kumar,A, PY - 2004/8/31/pubmed PY - 2004/11/17/medline PY - 2004/8/31/entrez SP - 10 EP - 6 JF - Journal of vector borne diseases JO - J Vector Borne Dis VL - 41 IS - 1-2 N2 - BACKGROUND & OBJECTIVES: In India, temephos and fenthion are used as larvicides in fresh and polluted waters. Since use of same insecticide may precipitate resistant, as an alternative bioefficacy of pirimiphos-methyl--an organophosphorus insecticide was evaluated against immatures of Anopheles and Culex species in different breeding habitats in District Ghaziabad (U.P.) and Goa. METHODS: Laboratory bioassays were carried out using standard WHO procedure. LC50 and LC90 were calculated using Probit analysis. Abbott's formula was used to calculate per cent corrected mortality in laboratory exposures while, Mulla's formula was applied for calculating per cent reduction in mosquito immatures under field conditions. RESULTS: Pirimiphos-methyl was found to be most effective against larvae of An. stephensi followed by An. culicifacies and Cx. quinquefasciatus. The LC50 and LC90 values against three species were 0.023, 0.032 and 0.04 ppm; and 0.045, 0.057 and 0.114 ppm respectively. In field, pirimiphos-methyl @ 200 g a.i./ha against Anopheles species and @ 300 g a.i./ha against Culex species can produce > 80% reduction in density of immatures up to one week in different habitats. Pirimiphos-methyl < 0.25 ppm is not toxic to fish. INTERPRETATION & CONCLUSION: Pirimiphos-methyl is more effective against anophelines in clean water than culicines in polluted water. This larvicide should not be used at a concentration above 0.25 ppm in habitats harbouring the larvivorous fish. SN - 0972-9062 UR - https://www.unboundmedicine.com/medline/citation/15332481/Evaluation_of_pirimiphos_methyl__50_EC__against_the_immatures_of_Anopheles_stephensi/An__culicifacies__malaria_vectors__and_Culex_quinquefasciatus__vector_of_bancroftian_filariasis__ L2 - http://www.mrcindia.org/journal/issues/411010.pdf DB - PRIME DP - Unbound Medicine ER -