Changes in host orientation behavior of female mosquitoes post exposure to a sublethal pyrethroid exposure

Adult mosquito control consists of barrier treatments and aerial spraying often using pyrethroids, however not all host seeking insects contacting insecticides are killed. Sublethal exposure to neurotoxic compounds can negatively affect sensory organs reducing their host locating efficiency. Female Aedes aegypti, Anopheles albimanus and Culex quinquefasciatus were exposed to LD25 levels of pyrethroid treatments and changes in flight orientation towards host odors were subsequently evaluated. Significant behavioral changes are discussed in the context of adult mosquito control and disease transmission.