Featured Research

from universities, journals, and other organizations

Surface layer effectively kills malaria mosquitoes in rice paddies

Date:
July 1, 2011
Source:
Wageningen University and Research Centre
Summary:
A thin, liquid layer applied on the surface of inundated rice paddies effectively kills malaria mosquito larvae without having an impact on other aquatic life. Rice yield remains the same and water was saved because of the anti-evaporative properties of the layer.

A thin, liquid layer applied on the surface of inundated rice paddies effectively kills malaria mosquito larvae without having an impact on other aquatic life. Rice yield remains the same and water was saved because of the anti-evaporative properties of the layer.

These conclusions were reached by scientists from Wageningen University and the Kenya Medical Research Institute who tested a silicone-based surface layer known as polydimethylsiloxane or PDMS, and commercially available as Aquatain. The results were published in this week's edition of PLoS ONE (Public Library of Science) and suggest that the surface layer is a suitable tool for controlling malaria mosquitoes in rice-agro ecosystems.

Malaria is still a major threat to public health in many areas with an estimated 225 million cases of malaria and 781,000 deaths each year. Most of these occur in sub-Saharan Africa and South East Asia, where many people rely on agriculture as their main source of income. Agricultural activities, such as irrigation, have been associated with increased numbers of malaria cases. Especially rice paddies provide ideal breeding sites for malaria mosquitoes. Control of these mosquitoes is challenging due to the large size and vegetation in these paddies, but simple tools such as evaluated by the Dutch and Kenyan researchers could be an important step forward.

Aquatain was originally designed as an anti-evaporation liquid to reduce water loss. It has the ability to self-spread, even around vegetation and debris, and cover the entire water surface. Aquatain does not negatively affect water quality and is certified for use on drinking water. The active agent, PDMS, is commonly used in shampoo conditioners, contact lenses etc. Therefore, the use of Aquatain as a mosquito control tool poses a minimal risk to the environment.

Based on initial laboratory results and the spreading properties of Aquatain, the researchers carried out a study at the Ahero rice irrigation scheme in western Kenya. Here, Tullu Bukhari and colleagues showed that application of the surface layer reduced the emergence of adult malaria mosquitoes from rice paddies up to 93%. This study also showed that there were minimal effects on non-target organisms and that the growth and development of rice plants in treated rice paddies was not affected.

Future research will focus on the operational feasibility of Aquatain application and determining its impact on reducing malaria cases in various epidemiological settings.


Story Source:

The above story is based on materials provided by Wageningen University and Research Centre. Note: Materials may be edited for content and length.


Journal Reference:

  1. Tullu Bukhari, Willem Takken, Andrew K. Githeko, Constantianus J. M. Koenraadt. Efficacy of Aquatain, a Monomolecular Film, for the Control of Malaria Vectors in Rice Paddies. PLoS ONE, 2011; 6 (6): e21713 DOI: 10.1371/journal.pone.0021713

Cite This Page:

Wageningen University and Research Centre. "Surface layer effectively kills malaria mosquitoes in rice paddies." ScienceDaily. ScienceDaily, 1 July 2011. <www.sciencedaily.com/releases/2011/07/110701132254.htm>.
Wageningen University and Research Centre. (2011, July 1). Surface layer effectively kills malaria mosquitoes in rice paddies. ScienceDaily. Retrieved September 2, 2014 from www.sciencedaily.com/releases/2011/07/110701132254.htm
Wageningen University and Research Centre. "Surface layer effectively kills malaria mosquitoes in rice paddies." ScienceDaily. www.sciencedaily.com/releases/2011/07/110701132254.htm (accessed September 2, 2014).

Share This




More Health & Medicine News

Tuesday, September 2, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Snack Attack: Study Says Action Movies Make You Snack More

Snack Attack: Study Says Action Movies Make You Snack More

Newsy (Sep. 2, 2014) You're more likely to gain weight while watching action flicks than you are watching other types of programming, says a new study published in JAMA. Video provided by Newsy
Powered by NewsLook.com
U.N. Says Ebola Travel Restrictions Will Cause Food Shortage

U.N. Says Ebola Travel Restrictions Will Cause Food Shortage

Newsy (Sep. 2, 2014) The U.N. says the problem is two-fold — quarantine zones and travel restrictions are limiting the movement of both people and food. Video provided by Newsy
Powered by NewsLook.com
Doctors Fear They're Losing Battle Against Ebola

Doctors Fear They're Losing Battle Against Ebola

AP (Sep. 2, 2014) As a third American missionary is confirmed to have contracted Ebola in Liberia, doctors on the ground in West Africa fear they're losing the battle against the outbreak. (Sept. 2) Video provided by AP
Powered by NewsLook.com
Tech Giants Bet on 3D Headsets for Gaming, Healthcare

Tech Giants Bet on 3D Headsets for Gaming, Healthcare

AFP (Sep. 2, 2014) When Facebook acquired the virtual reality hardware developer Oculus VR in March for $2 billion, CEO Mark Zuckerberg hailed the firm's technology as "a new communication platform." Duration: 02:24 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins