News

484 Hertz brings all the boy mosquitos to the yard

JAMES Cook University researchers have found sex sells when it comes to luring male mosquitoes.

Senior Research Officer Brian Johnson and Professor Scott Ritchie set out to make a cheap and effective audio lure for scientists collecting male Aedes aegypti mosquitoes - the species that carries dengue and yellow fever. 

They found a tone of precisely 484 Hertz, the frequency of a female Aedes aegypti's wings, brought 95 per cent of male mosquitoes to the trap. 

Mr Johnson said the device cost around $20 and could be run by itself for weeks. "We started with a cheap mobile phone and moved to an even cheaper MP3 player. There are no harmonics, it's a pure tone and very simple to produce."

The effectiveness of the audio lure is easy to see: when it's switched on, mosquitoes flock to the device, and fly away as soon as it's turned off, as can be seen in the video (link below).

The invention of the audio trap is timely: male mosquitoes do not bite, but new anti-mosquito strategies involve capturing and sterilising them before releasing them to breed unsuccessfully with females.

"There are a number of projects underway," said Mr Johnson. "They required capturing and releasing tens of thousands of male mosquitoes, but most traps are aimed at capturing females."

He said there was no chance of eliminating mosquito populations by trapping males alone, as only a few needed to survive to continue the breeding cycle.

The scientists also found that female mosquitoes were completely oblivious to the sound of male wing beats. "There's no real need for females to respond to male overtures," said Mr Johnson.

The team is now optimising the trap for field use and coordinating with trap manufacturers to add the feature to their products.
 

Topics:  james cook university, mosquitos



Nine males, one female; divers watch turtles get frisky

Mating season ends this month.

One female, nine males, this is all part of nature for turtles

Unlike: the Facebook scam targeting Bundy businesses

ALARM BELLS: Cool Bananas co-owner Sharlene Gemming managed to avoid the phishing trap. Photo: Eliza Goetze / NewsMail

Scammers are targetting local cafes on Facebook

Local Partners

'Highly unlikely' Brad Pitt will face prosecution

It is highly unlikely that Brad Pitt will be prosecuted

WATCH: Justin Bieber grabbed in Germany

A video has emerged of singer Justin Bieber being attacked

Why The Wrong Girl is right for Jessica Marais

Jessica Marais and Ian Meadows in a scene from the TV series The Wrong Girl.

ACTOR makes the sometimes awkward character her own in new comedy.

What's on the small screen this week

Jessica Marais in a scene from the TV series The Wrong Girl.

A NEW romantic comedy debuts while footy codes ramp up for finals.

Airbourne talk drop bears, beer and taxes

Airbourne have a new album coming out and a new tour on the way.  Photo Contributed

Airbourne release album for the aussie battler

Pippa Middleton had 3000 private photos stolen

Author Pippa Middleton

Author's account hacked to access 3000 private photos

Developers boost confidence in Bundaberg property market

Slow and steady growth has always been Bundaberg’s way

Property 200m from ocean selling for just over $100K

BEACHCOMBER PARK: Work has started on a new $19.2 million development at Toogoom.

The estate's developer is offering huge discounts for early buyers.

UPDATE: Former rodeo champ's sale rained out, now back on

Larkhill local Ken Consiglio is having an auction of most of the things on his property.

'People kept showing up and we had to turn them away'

First stages of $25 million housing development underway

New development on Madsen Rd - The Springs.

The blocks of land are much bigger than usual

Couple build their own 'tiny house' for $45k

Holly Bowen and Oli Bucher built their "tiny house" themselves, only hiring a plumber and an electrician. Photo/supplied

The house, which is built on a trailer and can be towed.

Rocky proves prime real estate in latest REIQ report

Kas Woch sold this Wood St home in Depot Hill for $107,000 in August.

A new investor's market as Rocky house prices hit lowest in state