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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 90, No. 3, 1995, pp. 411-413
Bioline Code: oc95080
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 90, No. 3, 1995, pp. 411-413

 en Effects of three organophosphorus insecticides in the reproductive potential of Culex quinquefasciatus
Lucita Aguilera; Maria Del Carmen Marquetti; Agustin Navarro & Juan Bisset

Abstract

A Culex quinquefasciatus Say 1823 strain with resistant
genes to organophosphates was tested in the laboratory to
know the reproductive potential after exposure, as larvae,
at the LC^30 and LC^70 (mg/l) of three organophosphorus
insecticides: malathion, chlorpyrifos and
methyl-pirimiphos. Data showed that fecundity was decreased
significantly by malathion at LC^30=0.0025 and LC^70=
0.0075, whereas fertility had a no significant decrement by
chlorpyrifos and methyl-pirimiphos at the LC^70 (0.000016,
0.00043). The sexual index was affected by chlorpyrifos and
methyl-piritniphos showing a greater number of adult
females.

Keywords
insecticide - malathion - chlorpyrifos - methyl-pirimiphos - reproduction - Culex quinquefasciatus

 
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