title: Efficacy of mosquito coils containing 0.3% and 0.4% pyrethrins against An.gambiae sensu lato mosquitoes.
abstract: OBJECTIVE
  To investigate the efficacy of a formulation containing 0.4% pyrethrins against registered mosquito coil containing 0.3% pyrethrins.
  
  
  METHODS
  Non intervention analytical study.
  
  
  METHODS
  Four villages in Mashonaland East province, Mumurwi, Chitengu, Katiyo and Nyagande.
  
  
  METHODS
  Biological efficacy of Doom and IT mosquito coils.
  
  
  METHODS
  To measure insecticidal, knock down and inhibition of biting activities of the coils in the presence of mosquitoes.
  
  
  RESULTS
  A two hour exposure of mosquitoes to both coils results in a 99% and 98.5% mortality rate for a 0.4% and a 0.3% formulation respectively. The KT50 and KT90 of a formulation containing 0.4% pyrethrins were half those of a 0.3% formulation, suggesting that a 0.4% formulation has a rapid knock down effect. A formulation containing 0.4% pyrethrins inhibited 92.5% from biting as compared to a 0.3% formulation (80%).
  
  
  CONCLUSIONS
  A formulation containing 0.4% pyrethrins is more effective in repelling mosquitoes than a 0.3% formulation.
authors.affiliation: Blair Research Laboratory, Harare, Zimbabwe.
authors.forename: N
authors.initials: N
authors.lastname: Lukwa
authors.forename: S K
authors.initials: SK
authors.lastname: Chandiwana
mesh_terms: D000818:Animals; D000852:Anopheles / Q000502:physiology; D002626:Chemistry, Pharmaceutical; D005247:Feeding Behavior; D007306:Insecticides / Q000737:chemistry*; D009032:Mosquito Control / Q000295:instrumentation / Q000379:methods*; D011722:Pyrethrins / Q000737:chemistry*; D015030:Zimbabwe
chemical_list: D007306:Insecticides; D011722:Pyrethrins