Abstract
The efficacy of ‘Tofeto’ and two synthetic insecticides, chlorpyrifos and cypermettrin were compared as fumigants and repellants against Anopheles spp. Knockdown, mortality and repellency responses were noted and compared. ‘Tofeto’ had a significantly higher knockdown effect on mosquitoes, while chlorpyrifos had the least. Cypermethrin had the fastest mortality time. ‘Tofeto’ compared favourably with cypermethrin and chlorpyrifos as a repellant having the highest percentage repellence and repellency index.
 
 Keywords: Synthetic insecticides, Repellants, Haematophagus, Anthropophilic, Knockdown
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