Dengue Season Is Here: Is Your Municipality Ready with a ULV Backpack Sprayer?

When the first rains fall, the outbreak countdown begins. The local agencies that prepare first are the ones that genuinely protect lives.

A true story by the canal: a boy falls ill with dengue in the first week of the rains

In early June, only days after the season's first rains, nine-year-old Focus, a boy in a canal-side sub-district in central Thailand, developed a sudden high fever, body aches and red spots on his arms. His mother rushed him to the sub-district health-promoting hospital before he was referred to the district hospital, where doctors diagnosed dengue fever.

When the village health volunteers and public-health staff conducted the disease investigation, they found several water-holding containers around Focus's home — plant-pot saucers, old tyres and post-rain puddles — perfect Aedes breeding sites. Worryingly, within a hundred-metre radius stood several more homes with school-age children.

This is the situation municipalities and sub-district administrations across the country face at the start of every rainy season. A single infected female Aedes mosquito can transmit the virus to many people within days. If vector control is not timely, a small outbreak in one household can spread across a whole community fast.

Why old-style mosquito spraying often falls short

Many agencies still use old thermal foggers that produce coarse droplets and thick smoke. Impressive as the smoke looks, large droplets fall to the ground quickly and cannot stay airborne long enough to contact flying adult mosquitoes, leaving kill efficiency lower than it should be.

Another problem is old machines that are hard to start, run unevenly, or are so heavy that staff tire quickly. When a single day must cover several communities, an unreliable machine becomes an obstacle that leaves some at-risk spots only partly treated.

Spraying that does not meet the ULV standard also wastes chemical and disperses more than necessary, affecting both environment and cost. Effective vector control therefore needs equipment that produces very fine droplets, disperses far, and works continuously for long periods.

The cost of an outbreak: numbers local agencies must not overlook

The Department of Disease Control reports tens of thousands of dengue cases each rainy season in Thailand, with preventable deaths when vector control comes too late. Every case is a treatment cost, lost school and work days, and immeasurable family distress.

For local agencies, an uncontrolled outbreak also means questions from the council, local media and the public about why disease prevention fell behind. That shaken confidence is harder to rebuild than the cost of prevention from the start.

Conversely, municipalities that invest in a quality ULV sprayer and plan proactive spraying before the rains often see local case numbers fall noticeably. That is the true value of a disease-prevention budget.

10 reasons the SOLO PORT 423 is a municipality's core weapon in dengue season

1. ULV droplets below 30 microns — Very fine droplets stay airborne longer, contacting and killing flying adult mosquitoes effectively — exactly the vector-control principle public-health authorities recommend.

2. Reaches up to 12 metres — Covers wide areas in little time, reaching bushes, under-house spaces and dark corners where mosquitoes hide, reducing untreated risk spots.

3. Air velocity 1,400 m³/h — High airflow pushes droplets evenly and into elevated areas, ideal for communities with dense vegetation.

4. 12-litre tank, continuous work — Sprays for long stretches without frequent refills, so several communities can be covered in one round on time.

5. Light, just 11 kg — Staff and village health volunteers can carry it all day without excessive fatigue, reaching every lane.

6. Durable German engine — A high-quality 2-stroke engine with Nikasil-coated cylinder starts easily and runs smoothly, handling heavy use throughout the rainy season.

7. Saves chemical, cuts cost — The ULV system uses less chemical for the same effect, stretching the agency's consumable budget across the season.

8. Environmentally friendlier — Dispensing the right amount reduces residue in the community, safer for citizens and the environment.

9. Mosquito control and disinfection — Beyond killing mosquitoes, it sprays disinfectant in public areas too — one machine, many missions.

10. Domestic after-sales support — Parts and service are ready, so the machine stays with the agency for many seasons without interruption.

A proactive spray plan municipalities can actually use

Effective mosquito control is not spraying after cases appear, but proactive spraying on a plan. It starts with surveying and destroying larval breeding sites with village health volunteers before the rains, then scheduling regular ULV rounds over risk areas — schools, temples, markets and dense communities.

When the first case appears, the agency must spray within a hundred-metre radius of the patient's home within 24 hours, and repeat by the mosquito life-cycle. A sprayer with long reach, continuous operation and easy mobility like the SOLO PORT 423 lets the team respond fast and thoroughly.

Having ready, reliable equipment is what makes these proactive plans real rather than plans on paper — and that is the difference between a community that contains an outbreak and one that lets disease spread.

A voice from a municipal public-health officer

“This year we started proactive spraying before the first rains, using a machine with long reach and long continuous run time. Our team covered the whole sub-district much faster than before, and by mid-season local case numbers were clearly down on last year. Residents feel safer.”

— Public-health officer, a sub-district municipality

Frequently asked questions about community mosquito control

When should mosquito spraying start?

Start proactively before the rainy season, alongside destroying larval breeding sites. Do not wait for cases — spraying after an outbreak often cannot catch up.

Can the SOLO PORT 423 spray both mosquitoes and disinfectant?

Yes. It handles both insecticide and disinfectant in public areas — a versatile tool for an agency's disease-control work.

Is it suitable for community health-volunteer teams?

Very. Its light weight and balanced backpack design let volunteers and staff work nimbly in narrow lanes and dense communities.

Ready to upgrade your agency's disease-control capability?

The SOLO PORT 423 meets government TOR criteria and fits the procurement budgets of municipalities, sub-district administrations (SAO) and public-health agencies.

Call our team: 065-556-6294  |  LINE: @whd268

World Health Disinfection Co., Ltd. — disease-control equipment specialists for government agencies

Related links

• SOLO PORT 423 ULV backpack mist sprayer
• World Health Disinfection — disease-control equipment hub
• Mosquito fogging & pest-control services for agencies

References: Department of Disease Control, MoPH Thailand · World Health Organization (WHO)

Conclusion: preparing before the first rains is protecting lives

Dengue season comes every year. The question is whether your agency prepares before or after the outbreak. Municipalities and sub-district administrations that invest in a quality ULV sprayer and plan proactive spraying are the ones that genuinely protect children like Focus.

With ULV droplets, long reach and German-grade durability, the SOLO PORT 423 helps an agency's mosquito-control plan deliver real results all season. For information and pricing, contact the team today. #SOLOPORT423 #AedesControl