title: [Effect of pyriproxyfen for the Aedes (S) aegypti control (Diptera: Culicidae) in strains with various degrees of temephos resistance].
abstract: BACKGROUND
  the continuous use of the organophosphate temephos for Aedes (Stegomyia) aegypti (Linnaeus, 1762) has prompted the emergence of resistance to this product in several countries. Pyriproxyfen is an analogue of the juvenile hormone recommended by the World Health Organization as one of the alternative regulators of the dengue vector in drinking waters.
  
  
  OBJECTIVE
  to evaluate the efficacy of pyriproxyfen in those strains with various degrees of temephos resistance, in order to be used as a possible regulator of Ae. aegypti.
  
  
  METHODS
  for this study, two reference Ae. aegypti strains were used, one susceptible and the other resistant to temephos, and three field strains collected in Boyeros, Cotorro and 10 de Octubre municipalities, all of them from the City of Havana province, Cuba. For the temephos and pyriproxyfen evaluation, the WHO recommended bioassays were used.
  
  
  RESULTS
  at high concentrations, pyriproxyfen showed larvicidal properties. At 0,01 and 1 ppb concentrations, inhibition of emergence due to increase of pupal mortality and to lesser extent in adults in the process of breaking the pupal exubia was demonstrated. This growth regulator was effective at the same doses in all the strains, regardless of the degree of temephos resistance, being IE50 values within the range for Aedes genus.
  
  
  CONCLUSIONS
  according to the results, the effectiveness of pyriproxyfen was not affected by the degree of temephos resistance in the studied strains, and this is a useful tool in the Ae. aegypti control.
authors: Departamento Control de Vectores, Instituto de Medicina Tropical Pedro Kouri, Ciudad da La Habana, Cuba. yanelys@ipk.sld.cu
authors: Yanelys
authors: Y
authors: Ricardo Leyva
authors: Maria Magdalena
authors: MM
authors: Rodríguez Coto
authors: Juan A
authors: JA
authors: Bisset Lazcano
authors: Omayda
authors: O
authors: Pérez Insueta
authors: Lizet
authors: L
authors: Sánchez Valdés
mesh_terms: D000330:Aedes / Q000145:classification; D000818:Animals; D007305:Insecticide Resistance; D009032:Mosquito Control / Q000379:methods*; D011725:Pyridines; D000002:Temefos
chemical_list: D011725:Pyridines; C055613:pyriproxyfen; D000002:Temefos