Navigation Links
Baiting mosquitoes with knowledge and proven insecticides

This press release is available in Spanish.

While one team of U.S. Department of Agriculture (USDA) scientists is testing the effectiveness of pesticides against mosquitoes, another group is learning how repellents work.

At the Agricultural Research Service (ARS) Center for Medical, Agricultural and Veterinary Entomology (CMAVE) in Gainesville, Fla., entomologist Sandra Allan is using toxic sugar-based baits to lure and kill mosquitoes. Allan and her CMAVE cooperators are evaluating insecticides and designing innovative technology to fight biting insects and arthropods. ARS is USDA's principal intramural scientific research agency.

Allan studied 10 different commercial pesticides that contain additives that enable the pesticides to be dissolved in water and ingested by mosquitoes. Pesticides were combined with a sucrose solution and fed to females of three mosquito species that transmit pathogens such as West Nile virus and arboviruses. While only females feed on blood, all mosquitoes need to feed on sugar and will potentially be attracted toand ingestthe toxic sugar bait.

Compounds from five different classes of insecticide-active ingredientspyrethroids, phenylpyroles, pyrroles, neonicotinoids and macrocyclic lactoneswere found to be toxic against all three mosquito species, Culex quinquefasciatus, Anopheles quadrimaculatus and Aedes taeniorhynchus.

Scientists at the ARS Henry A. Wallace Beltsville Agricultural Research Center in Beltsville, Md., are learning more about how mosquito repellents work. Entomologist Joseph Dickens and post-doctoral research associate Jonathan Bohbot found that several repellentsDEET, 2-undecanone, IR3535 and picaridinaffect specific odorant receptors in mosquitoes differently, thereby scrambling the insect's ability to detect chemical attractants.

In experiments, they injected frog eggs with odorant receptor genes. Molecular mechanisms within the eggs allowed these receptors to be reproduced in the outer cell membrane of the egg. Researchers then placed electrodes in the outer cell membrane and recorded electrical responses of the odorant receptors to chemical solutions.


Contact: Sandra Avant
United States Department of Agriculture - Research, Education and Economics

Related biology news :

1. New rearing system may aid sterile insect technique against mosquitoes
2. Mosquitoes -- how we smell is why they bite, research shows
3. International Polar Year conference: From knowledge to action
4. Fruit flies provide new knowledge about uninhibited cell growth
5. A network of knowledge on biodiversity and ecosystem services in Europe
6. Old aerial photos supply new knowledge on glaciers in Greenland
7. Spatial knowledge vs. spatial choice: The hippocampus as conflict detector?
8. Danish researchers release ground-breaking knowledge about calcium pumps in cells
9. New means of safeguarding world fish stocks proven
10. Unique adaptations to a symbiotic lifestyle reveal novel targets for aphid insecticides
Post Your Comments:
(Date:4/15/2016)... 15, 2016 Research and ... Biometrics Market 2016-2020,"  report to their offering.  , ... , ,The global gait biometrics market is expected ... the period 2016-2020. Gait analysis generates ... be used to compute factors that are not ...
(Date:4/13/2016)... 13, 2016  IMPOWER physicians supporting Medicaid patients in ... new clinical standard in telehealth thanks to a new ... higi platform, IMPOWER patients can routinely track key health ... mass index, and, when they opt in, share them ... to a local retail location at no cost. By ...
(Date:3/31/2016)... , March 31, 2016  Genomics firm Nabsys has ... CEO, Barrett Bready , M.D., who returned to ... the original technical leadership team, including Chief Technology Officer, ... Product Development, Steve Nurnberg and Vice President of Software ... the company. Dr. Bready served as CEO ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... , June 27, 2016   Ginkgo Bioworks ... to industrial engineering, was today awarded as one ... selection of the world,s most innovative companies. Ginkgo ... scale for the real world in the nutrition, ... engineers work directly with customers including Fortune 500 ...
(Date:6/23/2016)... ... June 23, 2016 , ... Mosio, ... second eBook, “Clinical Trials Patient Recruitment and Retention Tips.” Partnering with experienced clinical ... eBook by providing practical tips, tools, and strategies for clinical researchers. , “The ...
(Date:6/23/2016)... -- Houston Methodist Willowbrook Hospital has signed a ... serve as their official health care provider. As ... provide sponsorship support, athletic training services, and most ... athletes and families. "We are excited ... to bring Houston Methodist quality services and programs ...
(Date:6/23/2016)... ... ... Supplyframe, the Industry Network for electronics hardware design and ... in Pasadena, Calif., the Design Lab’s mission is to bring together inventors and ... brought to market. , The Design Lab is Supplyframe’s physical representation of one ...
Breaking Biology Technology: