Mosquitoes Becoming Abundant Following Heavy Rains and Floods

Below is the summary of mosquito activity in Iowa from the ISU Medical Entomology Laboratory. During the summer months, the Iowa State University Medical Entomology Laboratory monitors mosquito populations and mosquito-borne diseases in Iowa.   Mosquito collection data can be viewed online at the Iowa Mosquito Net.  


Monitors indicate that mosquitoes are becoming abundant at many sites around Iowa.  Survey sites in Story, Black Hawk, and Polk Counties are collecting hundreds of mosquitoes per night, which is an indication that they are more than just common. Mosquito levels are still not as high as we have seen in the past though, when traps have yielded up to a few thousand per night!


With all of the recent rainfall and subsequent creation of mosquito breeding habitat, mosquito numbers are likely to rise in the next few weeks. This is a time to be aware of how you can help to control mosquito numbers. Get rid of the larval habitat - dump the water out of reservoirs on your properties: barrels, tires, bird baths, turned over truck toppers, anything that will hold rainwater. As long as those containers can hold water for even a week, they can contribute to mosquito populations!

Species being collected are mostly nuisance mosquitoes that will visit people for bloodmeals but do not harbor infectious disease agents. As the summer proceeds, we will start to see greater species diversity among mosquitoes, but for now, communities are unevenly dominated by Aedes vexans.



Mosquito trap catch data from the ISU Medical Entomology Laboratory, June 27, 2014.Mosquito trap catch data from the ISU Medical Entomology Laboratory, June 27, 2014.



Links to this article are strongly encouraged, and this article may be republished without further permission if published as written and if credit is given to the author, Horticulture and Home Pest News, and Iowa State University Extension and Outreach. If this article is to be used in any other manner, permission from the author is required. This article was originally published on June 27, 2014. The information contained within may not be the most current and accurate depending on when it is accessed.