More than 226,000 acres in Michigan have received aerial treatment for Eastern Equine Encephalitis as of Friday, according to the state.
Thursday night saw more than 69,000 acres treated.
The state also confirmed a human case of EEE in Barry County.
Because of nighttime temperatures expected to be below 50 degrees over the weekend, treatment will only resume Monday.
The mosquito that carries EEE does not fly when temperatures are below 50 degrees.
However, mosquitos are still present and will remain active until there is a hard freeze.
The state asks Michiganders to continue taking precautions until the temperature drops below 28 degrees for an extended period of time.