Mosquitoes and West Nile Virus in Larimer County
West Nile virus (WNV) is a disease spread from infected mosquitoes to people. In 2023, we saw record numbers of mosquitoes that can carry this virus in Larimer County, including in the Town of Berthoud.
The Town of Berthoud currently has a mosquito management program that uses larvicides to control mosquito populations. Larvicides are insecticides that target mosquito larvae, helping to manage mosquitoes both indoors and outdoors. Larvicides do not kill adult mosquitoes.