Lecture for Ol Trap Orientation

MOSQUITO OL-TRAP

What is DOST Mosquito Ovi/Larvicidal What is DOST Mosquito Ovi/Larvicidal (OL) Trap (OL) Trap System? System?

April 21, 2023 2DOST School-based O/L Trap Program

• Is a system used to control the population of the dengue carrying Aedes mosquitoes.

• It has three important parts: a black container, a small strip of lawanit measuring 1” x 6.5” for mosquitoes to lay their eggs on, and pellets as larvicide.

•The OL-Trap’s ovicidal and larvicidal effect prevent the next generation of mosquitoes from reaching adulthood, thus curbing the Aedes mosquito population.

Tumbler

PelletsPaddle

MOSQUITO OL-TRAP


HOW THE OL-TRAP WORKS?HOW THE OL-TRAP WORKS? The idea is to attract mosquitoes particularly the

Aedes aegypti and albopictus (dengue carrier) to lay their eggs on the lawanit paddle.

The trap creates optimum conditions for this species to lay its eggs: stagnant, clean, clear water, dark area and damp rough surface.

MOSQUITO OL-TRAP


The eggs will either be trapped in the lawanit paddle or find its way into organic solution, where they are killed before transforming into adults.

Eggs

Larvae

MOSQUITO OL-TRAP

Distribution of OL TrapDistribution of OL Trap


CLASSROOM1 OL Trap –indoor

and 1 OL Trap-outdoor









SCHOOL

1 OL Trap indoor

1 Tumbler (Black Container)

1 sachet of pellet per week1 pc paddle per month

1 OL Trap outdoor

1 Tumbler (Black Container)

1 sachet of pellet per week

1 pc paddle per monthCLASSROOM

MOSQUITO OL-TRAP

Servicing the OL TrapServicing the OL Trap

• OVITRAPS are installed and serviced every seven days in locations where transmission of dengue is probable

nursery schools pre-schools elementary schools Hospitals community with confirmed dengue cases Ovitrap Index = > 10%


MOSQUITO OL-TRAP

Before OL Trap InstallationBefore OL Trap Installation• Clean-up all possible breeding sites/containers found

inside/outside the classrooms – DO SEARCH and DESTROY


Artificial containers (man-made)

Natural containers

1. Flower vases and pot plates2. Pails, water-storage jars, basins3. Discarded receptacles4. Choked roof gutters5. Gully Traps6. Unused toilet bowls and cisterns7. Aircon Tray and dish rack tray8. Concrete drains

1. Tree Holes, bamboo stumps2. Leaf axils, fallen leaves3. Ground Depressions

MOSQUITO OL-TRAP


Where to set up the DOST OL-Trap? Where to set up the DOST OL-Trap?

AA. Indoor:. Indoor: Under the sink Corner of the room Under the cabinet Under the bed Inside the comfort room

B. Outdoor (covered area):B. Outdoor (covered area): Corner of the classroom Near vegetation Piles of woods/hollow

blocks Garden

MOSQUITO OL-TRAP

Setting the OL TrapSetting the OL Trap

• Step 1 Fill the plastic tumbler with tap

water up to the lined mark just above the DOST logo (~250 ml)


MOSQUITO OL-TRAP


• Step 2 Pour one pack OL pellets

into the plastic cup Stir thoroughly to ensure pellets are dissolved


MOSQUITO OL-TRAP


• Step 3 Place the lawanit stick in the

solution with the rough surface facing up


MOSQUITO OL-TRAP


• Step 4 Place 1 cup each inside

and outside the classroom in a low-lying and dark area If outside, protect from direct

sunlight and rainfall Take care not to spill the

contents Keep out of reach of children

and animals


MOSQUITO OL-TRAP

Setting the OL TrapSetting the OL Trap• Step 5

Collect trap and note for the following on the seventh (one week

after installation (every Monday) day Eggs on the paddle Live larva/pupa The presence of even one larvae indicates a positive trap

Record in the OL Trap Monitoring Sheet (3 copies)


MOSQUITO OL-TRAP


• Step 6 Repeat steps 1-5 every 7 days

Set and collect the traps every Monday Finalize report every TuesdayNote: If collection period falls on a holiday, please

collect traps a day before


MOSQUITO OL-TRAP

Cleaning the TrapCleaning the Trap

• Vigorously brush-off into the solution eggs stuck into the lawanit creases

• Kill the larva/eggs by pouring hot water into the black tumbler

• Dispose contents properly by pouring

contents on dry ground


MOSQUITO OL-TRAP

Identifying a POSITIVE/NEGATIVE TrapIdentifying a POSITIVE/NEGATIVE Trap


Presence (+)/ absence (-) of eggs in the paddle

Presence (+)/ absence (-) of larvae in the container/tumbler with water

MOSQUITO OL-TRAP


Paddle Tumbler RESULT

Positive (+) Positive (+) = POSITIVE (+)

Positive (+) Negative (-) = POSITIVE (+)

Negative (-) Positive (+) = POSITIVE (+)

Negative (-) Negative (-) = NEGATIVE (-)

An OL Trap is positive or negative if;

MOSQUITO OL-TRAP

OL Trap Monitoring SheetOL Trap Monitoring Sheet


Click here

MOSQUITO OL-TRAP

Filling Out of Monitoring SheetFilling Out of Monitoring Sheet


Click Here

MOSQUITO OL-TRAP


Prevention / ControlPrevention / Control

MOSQUITO OL-TRAP

School AssembliesSchool Assemblies


MOSQUITO OL-TRAP

School Dengue BrigadeSchool Dengue Brigade


MOSQUITO OL-TRAP

Search and Destroy ActivitiesSearch and Destroy Activities


MOSQUITO OL-TRAP

Brigada Iskwela Brigada Iskwela (School Clean-ups) (School Clean-ups)


MOSQUITO OL-TRAP

Installation of Long-lasting Installation of Long-lasting Insecticide-treated Nets (LLINs)Insecticide-treated Nets (LLINs)


MOSQUITO OL-TRAP

Space-spraying ActivitiesSpace-spraying Activities


MOSQUITO OL-TRAP


“Dengue prevention and control rests primarily on the people who

live in the houses where the problems occur and by the people

who help create the mosquito larval habitats by their lifestyles.”

Documents

Lecture for Ol Trap Orientation