Forum für Wissenschaft, Industrie und Wirtschaft

Hauptsponsoren:     3M 
Datenbankrecherche:

 

Baiting Mosquitoes with Knowledge and Proven Insecticides

14.11.2012
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 to—and ingest—the toxic sugar bait.

Compounds from five different classes of insecticide-active ingredients—pyrethroids, phenylpyroles, pyrroles, neonicotinoids and macrocyclic lactones—were 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 repellents—DEET, 2-undecanone, IR3535 and picaridin—affect 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.

Sandra Avant | EurekAlert!
Further information:
http://www.ars.usda.gov

More articles from Agricultural and Forestry Science:

nachricht East African honeybees are safe from invasive pests… for now
17.04.2014 | Penn State

nachricht Changes in processing, handling could reduce commercial fishing injuries, research shows
16.04.2014 | Oregon State University

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Anzeige

Anzeige

IHR
JOB & KARRIERE
SERVICE
im innovations-report
in Kooperation mit academics
Veranstaltungen

Internationale Konferenz „Farbe als Experiment“

24.04.2014 | Veranstaltungen

Internationaler Kongress für erneuerbare Meeresenergien 2014 in Cherbourg

24.04.2014 | Veranstaltungen

Richtig vorsorgen und vererben

24.04.2014 | Veranstaltungen

 
B2B-VideoLinks
Weitere VideoLinks >>>
Aktuelle Beiträge

Siemens liefert fünf direkt angetriebene Windturbinen für Projekt in Ostholstein

24.04.2014 | Unternehmensmeldung

Hochspannung im höchsten Staudamm der Welt

24.04.2014 | Energie und Elektrotechnik

Passivhaus in der Schweiz: Energieversorgung in Eigenregie

24.04.2014 | Architektur Bauwesen