Most spraying will be done between Sunday and Thursday evenings between sunset and midnight, when mosquito activity is usually at its peak.
Hoping to get out in front of the problem before it arrives, St. Louis County health officials are making changes to better fend off the threat of Chikungunya. For the first time, human cases of the mosquito-borne disease have been reported in the U.S.
Last year was a banner year both for the sheer number of mosquitos and for the number carrying West Nile Virus but this year will be worse.
No human West Nile Virus cases have arrived here yet but St. Louis County health officials say they’re seeing a greater abundance of West Nile.