Cooperative Extension San Joaquin County
University of California
Cooperative Extension San Joaquin County

Posts Tagged: Culex quinquefasciatus

Davis Teen: How Those Pesky Mosquitoes Led to a Scientific Publication

Researcher and lead author Helena Leal, 17, a scholar at Davis High School, injects a sample of odorants trapped in a solid phase micro-extraction syringe intothe gas chromatography–mass spectrometry (GC-MS) in the Walter Leal lab at UC Davis. In back  are chemical ecologist Walter Leal (right) and UC Davis student researcher Kaiming Tan. (Photo by Kathy Keatley Garvey)

Listen to ABC Channel 10 News, broadcast Dec. 22Seventeen-year-old Helena Leal doesn't like mosquitoes, but they like her. “I always get bitten by mosquitoes more often than my family and friends,” says the Davis High School senior. “I...

UC Davis Researcher: What Repellents and Doses Are Best to Prevent Zika Virus

Working on zika-virus research are UC Davis chemical ecologist Walter Leal (foreground) and colleagues and co-authors Rosangela Barbosa (center) and graduate student Gabriel Faierstein of FIOCRUZ-PE, Recife, Brazil.

If you're traveling to—or living in--a Zika virus-infested area, it's far better to use DEET rather than Picaridin and to use higher, rather than lower, doses of DEET because lower doses do not work well with older mosquitoes, newly published...

Posted on Thursday, February 16, 2017 at 2:00 AM

Breaking News: Zika Virus Found in Wild-Caught Culex

Culex quinquefasciatus, the southern house mosquito,is known for transmitting the West Nile virus, but now the Zika virus has been detected in wild-caught C. quinquefasciatus in Recife, Brazil, the epicenter of the Zika epidemic. (Photo by Kathy Keatley Garvey)

The news is out.  It's what they've been searching for. In a groundbreaking discovery, a scientific team of Brazilians and Brazilian-born chemical ecologist Walter Leal of the University of California, Davis, has announced that the Zika virus has...

Posted on Friday, July 22, 2016 at 2:26 PM

What You Should Know About the Zika Virus

Zika Flyer

The (Zika) virus is here, and so is the mosquito. The question is whether there will be enough of both to set off an epidemic. That's what UC San Francisco medical student Joshua Lang wrote in his piece, With Summer Coming, Can the Zika Virus Be...

Posted on Monday, April 18, 2016 at 6:56 PM

Unraveling the Mystery of DEET

UC Davis scientists in the Walter Leal lab have discovered the odorant receptor in the Culex mosquito that repels DEET. From left are project scientist Pingxi Xu;  postdoctoral scholar Young-Moo Choo; AgChem graduate student Alyssa De La Rosa; and Professor Leal. (Photo credit: Academic Technology Services/Mediaworks)

You spray DEET on your arms, and those pesky mosquitoes leave you alone. It works. However,  not everyone wants to use DEET, a synthetic insect repellent. There's that smell, for one thing. "Properties that people do not like in addition to the...

Posted on Monday, October 27, 2014 at 5:05 PM

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