Pesticide Avoidance Behavior in Anopheles albimanus, a Malaria Vectorin Central and South America.

摘要

The biological effects of permethrin, deltamethrin and DDT on two laboratory colonies (Santa Tecla colony from EI Salvador and EI Semillero colony from Guatemala) and two field populations (Toledo and Corozal, Belize) of Anopheles albimanus were characterized by behavioral responses and susceptibility diagnostic tests. The susceptible laboratory colony (Santa Tecla) has been maintained at least 20 years and is susceptible to all three insecticides. The colony from Guatemala was recently colonized and exhibited resistance to permethrin, deltamethrin, and DDT. The third population "wild-caught" was from southern Belize and demonstrated resistance to DDT only. The fourth population ("wild-caught") was from Northern Belize and was susceptible to all three chemicals. Each behavioral study compared escape responses of each test population from a chamber affording direct contact with insecticide-treated surfaces or from a chamber that excluded direct contact with treated surfaces. Two control chambers (one with and one without direct contact with surfaces) treated with the carrier (Risella Oil) only were included in each study. Test chambers affording direct contact with treated surfaces showed a very dramatic escape response of Guatemalan and Belizean mosquitoes for all three chemicals. Numbers of females escaping from chambers without direct contact with treated surfaces were significantly greater than number escaping from control chambers (P < 0.05) but less than numbers escaping from chambers affording direct contact with insecticide.