Effects of three organophosphorus insecticides in the reproductive potential of Culex quinquefasciatus

Mem Inst Oswaldo Cruz. 1995 May-Jun;90(3):411-3. doi: 10.1590/s0074-02761995000300018.


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 LC30 and LC70 (mg/l) of three organophosphorus insecticides: malathion, chlorpyrifos and methyl-pirimiphos. Data showed that fecundity was decreased significantly by malathion at LC30 = 0.0025 and LC70 = 0.0075, whereas fertility has a no significant decrement by chlorpyrifos and methyl-pirimiphos at the LC70 (0.000016, 0.00043). The sexual index was affected by chlorpyrifos and methyl-pirimiphos showing a greater number of adult females.

MeSH terms

  • Animals
  • Cuba
  • Culex*
  • Female
  • Fertility / drug effects
  • Insecticides*
  • Male
  • Mosquito Control / methods
  • Organophosphorus Compounds*


  • Insecticides
  • Organophosphorus Compounds