Gravitrap is Effective for Management of Mosquito and Dengue in Singapore

Although Singapore has an intensive dengue control program, dengue remains endemic with regular outbreaks. We report development and use of a novel adult oviposition trap, the Gravitrap, in managing dengue cluster areas. The Gravitrap is a simple, hay infusion-filled cylindrical trap with a sticky inner surface to serve as an oviposition site for gravid female Aedes mosquitoes. Wire gauze fitted above the water level minimizes the risk of it being an unwanted breeding habitat. The Gravitrap was deployed in 11 dengue cluster areas throughout Singapore. Aedes aegypti was the predominant mosquito caught in the trap and some (5.73%) were found to be positive for dengue virus.

Most (85%) of the population in Singapore dwells in high-rise apartments.  This population faces regular outbreaks of dengue because of its high level of urbanization, high population density, low herd immunity, intense travel pattern, presence of Aedes vectors and possibly natural adaptation/selection of dengue viruses (DENVs) under the pressure of small populations of Aedes mosquitoes. Source reduction and environmental management are the hallmarks of the nation's vector control strategy, which decreased House Index (HI) from more than 50% in the 1960s and 1970s to 0.3% in the 2000s. Dengue control programs are challenged by the lack of cost effective tools that could trap adult Aedes mosquitoes and provide a reasonable population estimate of Aedes mosquitoes in the environment. This report describes development by the Environmental Health Institute of the Gravitrap, which is designed to lure and trap gravid female Aedes with a sticky lining. It exploits the skip-oviposition behavior of female Aedes aegypti, who distributes her eggs in multiple containers during each gonotropic cycle, a behavior that may increase offspring survival.


The Gravitrap is simple and economical to fabricate and is composed of a black container containing 10% hay infusion and an inner shorter cylinder lined with adhesive glue (URV32-Catchmaster; AP&G, Inc., Brooklyn, NY) to trap gravid females searching for oviposition sites. To prevent emergence of adults, in the event that eggs are laid before gravid females are trapped, the smaller inner cylinder is fitted with a wire netted base, which sits above two draining holes punctured through the outer container, 7 cm from the bottom of container.

The Gravitrap, developed by NEA’s Environmental Health Institute (EHI), is designed to attract and trap female Aedes mosquitoes that are looking for sites to lay their eggs. This Gravitrap is designed as a monitoring and communication tools to provide information on the population of mosquito around your surroundings. Free from all chemical, odour free and user-friendly, just top up water, this high quality Gravitrap mosquito trap comes with best price.  Get rid from mosquito and mosquito bites diseases like dengue and malaria with this high quality Gravitrap from Bugs-stop – Your Best Home Pest Control Solution in Singapore.

Source: https://www.ncbi.nlm.nih.gov/

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Tags: #Gravitrap #Mosquito #MosquitoesTrap #Pestcontrol #Bugsstop #Singapore #Gravitrapprice #dengue #EHI

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