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 August 20, 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 August 20, 2014).

Share This




More Health & Medicine News

Wednesday, August 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ebola-Hit Sierra Leone's Freetown a City on Edge

Ebola-Hit Sierra Leone's Freetown a City on Edge

AFP (Aug. 19, 2014) Residents of Sierra Leone's capital voice their fears as the Ebola virus sweeps through west Africa. Duration: 00:56 Video provided by AFP
Powered by NewsLook.com
101-Year-Old Working Man Has All The Advice You Need

101-Year-Old Working Man Has All The Advice You Need

Newsy (Aug. 19, 2014) Herman Goldman has worked at the same lighting store for almost 75 years. Find out his secrets to a happy, productive life. Video provided by Newsy
Powered by NewsLook.com
Researcher Testing on-Field Concussion Scanners

Researcher Testing on-Field Concussion Scanners

AP (Aug. 19, 2014) Four Texas high school football programs are trying out an experimental system designed to diagnose concussions on the field. The technology is in response to growing concern over head trauma in America's most watched sport. (Aug. 19) Video provided by AP
Powered by NewsLook.com
American Ebola Patient Apparently Improving, Outbreak Is Not

American Ebola Patient Apparently Improving, Outbreak Is Not

Newsy (Aug. 19, 2014) Nancy Writebol, an American missionary who contracted Ebola, is apparently getting better, according to her husband. The outbreak, however, is not. Video provided by Newsy
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