Fight the Bite! The West Nile Virus Updated and current as of 17 July 2003. Infection Area so far in 2003 as of July 16, 2003. Human cases in the U.S. in 2003. Human Cases in the U.S. in 2002. Human cases in Ohio in 2002. Montgomery County. Background.
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1. Larvicides can be used to control mosquitoes in the aquatic stage before they become biting adults. This type of control generally has the least effect on non-target species and the environment.
2. Mosquito adulticides should be considered the least desirable method of control and only used when isolations of virus and/or evidence of disease has been established. These materials have strengths and drawbacks that will influence which material is most appropriate for a given situation, and all must be applied according to label directions. Currently available adulticides include organophosphates, pyrethrins, and pyrethroid-based insecticides. These may be applied by hand-held, or backpack, foggers, or fixed-wing or rotary-wing aircraft.