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Purdue researcher: We shouldn't eliminate mosquitoes

"To yank [mosquitoes] out abruptly, I don't know what that does," entomologist Catherine Hill said.

By Brooks Hays
Purdue researcher: We shouldn't eliminate mosquitoes
Only a small percentage of mosquito species spread disease. Photo by James Gathany/Centers for Disease Control and Prevention

July 11 (UPI) -- Mosquitoes are despised for their itch-inducing bites and role in spreading disease. But at least one researcher doesn't want to see them eradicated entirely.

Catherine Hill, a professor of entomology at Purdue University, is working on an insecticide that will prevent mosquitoes from transmitting disease without harming the insect or other animal life.

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"For the last 20 years I've been trying to figure out how to kill mosquitoes, and then I had this epiphany where, morally, I'm just not OK with it anymore," Hill said in a news release.

Though not well understand, Hill believes mosquitoes likely play an important role in many ecosystems.

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"[They are] a large part of the biomass in many ecosystems," Hill said.

Any insect that's been around for millions of years is sure to have predators. In their larval or terrestrial stages, mosquitoes are food for a variety of species, including birds, bats, salamanders, lizards and frogs. As flying adults, they're consumed by spiders, frogs and others.

Hill worries about the unintended ecological consequences of eradicating the insect.

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"To yank [mosquitoes] out abruptly, I don't know what that does," Hill said.

Only a small percentage of mosquitoes transmit disease, yet scientists know very little about these species and their role in local food chains. The vast majority of mosquito research is focused on eradicating those that spread disease.

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Should her work ultimately prove unfruitful, Hill acknowledges lethal insecticides will be necessary to curb species operating as disease vectors. But she hopes scientists will take a closer look at unintended consequences of removing species from an ecosystem.

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"You pull one little piece and start to unravel it, and things happen," said Hill.

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