Introduction Dengue also known as breakbone fever is a mosquito-borne disease that already killed thousands of lives. It is caused by any one of four closely related dengue viruses and transmitted by the bite of mosquito within the genus Aedes, principally A. aegypti. It is characterized by headache, severe joint pain and a rash. Each year, an estimated 100 million cases of dengue occur worldwide and in our country it is reported as a leading cause of childhood hospitalizations. As of now, there are no specific remedies for a dengue virus; you can only prevent the spreading of it. Prevention is done by controlling A. aegypti by eliminating its habitats and protection from the bites of mosquitoes that spreads it. To help reduce the reproduction of dengue carrying mosquitoes, the Department of Science and Technology through its Industrial Technology Development Institute (ITDI) developed the Mosquito Ovicidal/Larvicidal Trap or OL trap. Description The OL trap system have three important parts. First is the black cup which has a DOST logo, a popsicle stick-like strip of lawanit (coconut husk wall paneling) measuring 1″x6.5″ for mosquitoes to lay their eggs on, and a larvicide solution that will kill the larvae if it will hatch in the lawanit and in the solution. When the kit materials are placed in areas known to be the breeding place of mosquitoes, the scent of the solution attracts female Aedes aegypti to lay their eggs on the lawanit stick. While the trap does not kill the mosquito, it kills the hundreds of eggs that it lays. The trap’s crucial component is the pepper-based solution developed by leading Filipino entomologists and DOST scientists. The OL trap’s effect is to prevent the next generation of mosquitoes to develop so it will curb the Aedes mosquito population. The DOST OL Trap System The main component of this OL trap is the solution made from natural active ingredient which is safe to humans but is pestilent to mosquitoes. After careful study and research and field testing of the OL trap in Quezon City and Marikina City, DOST partnered with the Department of Health (DOH) in its nationwide launching. What’s good with this OL trap system is that it is effective in attracting Aedes mosquitoes and lethal to hatched larvae. It is also safe, inexpensive and make-use of natural active agent. How It Works The reason why the cup is black is because mosquitoes are attracted to dark colors, so it attracts Aedes mosquitoes to lay their eggs on the lawanit stick. The trap creates optimum conditions for this species to lay its eggs: stagnant, clean, clear water, dark area and damp rough surface. The eggs will either be trapped in the lawanit stick or it will end up in the organic larvicide solution wherein they will be killed before they transform ito an adult Aedes mosquitoes. Steps in Using the OL Trap System 1. Fill the cup with tap water up to the lined mark of the DOST logo (250 ml). 2. Pour 1 pack of pellets in the cup and make sure to stir thoroughly to make sure it is dissolved well. 3. Put the lawanit stick in the solution with the rough surface up. You can use the stick to dissolve the pellets. 4. Place 1 cup each in the dark and low-lying area inside and outside of your house. Make sure not to spill the contents and most importantly keep out of reach of children and animals. 5. Collect the trap and note for the following on the sixth day.
- Eggs on the paddle
- Live larva/pupa
- The presence of even one larvae indicates a positive trap
6. After six days, gently brush off the stuck eggs in the lawanit stick into the solution. Pour boiling water into the container and dispose all the liquid content of the cup in a dry ground. A packet of a specially formulated pellets is good for 1 week before it needs to be replaced again. The DOST has advised that each houses should have at least four traps, two inside and two outside. They also pointed out that the OL trap system is just one way to prevent the spread of dengue but the primary measure still depends on how we keep our environment clean and to destroy all the breeding places of the Aedes mosquitoes. Scientists are still working to improve the OL trap system and find a better ovicide and larvicide solutions. You may contact Heritage Veterinary Corporation (HVC), authorized manufacturing and distributor of DOST Mosquito OL Trap at Tel. No. 641-0833 or email them at firstname.lastname@example.org. Reference and Sources: http://filipinoinventionsanddiscoveries.blogspot.com/search?updated-max=2013-07-07T12:17:00%2B08:00&max-results=100&start=10&by-date=false https://devcomconvergence.wordpress.com/2013/08/31/dost-region-6s-mosquito-ovicidallarvicidal-ol-trap-as-an-alternative-mosquito-trap-in-reducing-dengue-mosquito/