Wednesday evening and into Thursday morning, the city did its regular course of spraying for mosquitos throughout Marshalltown.
Mosquitos breed in water. And, according to a study by the department of entomology at Iowa State University, last summer's drought substantially curbed the mosquito population.
But with the heavy rains this season, the city felt spraying was necessary to control the mosquito population, according to the Public Works Department.
T-R PHOTO BY ANDREW POTTER
The City of Marshalltown sprayed for mosquitoes Wednesday night. Pictured is a truck spraying just off a wooded area near a group of apartment buildings on Seventh Avenue.
Last year's drought prevented the need for spraying, according to Public Works. The city normally does a few courses of the spraying throughout the summer, depending on how bad mosquitoes get.
Because fumes from the chemicals road crews spray can be quite unpleasant, the city advises residents to stay indoors while road crews treat their area.
According to ISU's entomology department's website, which tracks mosquito numbers, the mosquito population across the state is more than six times higher than this time last year.
Information on plans for the next course of spraying was unavailable at press time.