(Radio Iowa) – An expert on insects says it’s been a great summer in Iowa for mosquitoes, and a lousy summer for people who are getting nipped by the flying pests. Entomologist Lyric Bartholomay says mosquitoes are thriving in Iowa and all across the Midwest due to heavy rains and hot weather, which may also bring a rise in insect-borne diseases like West Nile virus. “In a situation like this year where we’re experiencing record rainfall and record high temperatures, it becomes kind of a perfect storm for mosquitoes to have ample places to lay their eggs and for their immatures to develop,” Bartholomay says. “I think we’re heading into what could be a serious West Nile virus year with a lot of cases.”

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She says climate changes could be leading to a rise in cases of various diseases carried by mosquitoes, as seasonal changes are impacting mosquito activity. “Maybe folks have noticed, too, that the last date of frost is coming later and maybe the threat of frost in the spring is wearing away sooner,” Bartholomay says, “and so in many parts of the country, mosquito season is just lasting longer.” Bartholomay says there are a variety of ways to try and control mosquito populations, including eliminating anything with standing water in your yard which might become a mosquito hatchery. Plus, there are several effective chemicals.

“For immature stages, we have an arsenal of controls that includes all kinds of microbials, things like hormone mimics that disrupt how they grow, and then more traditional insecticides,” she says. “For adults, we have a few kinds of insecticides that can be used either from a backpack fogger or a truck or an airplane.”

She notes, a community’s capacity to use those tools depends on its investment in controlling the insects. Bartholomay is an entomology professor at the University of Wisconsin-Madison.