Brown Planthopper Wiped a 80-Rai Lopburi Vegetable Farm Airofog U260 ULV Brought It Back

Seven Days That Turned an 80-Rai Lopburi Farm Yellow

Mr Tee farms 80 rai (~12.8 ha) of kale, choy sum, and chilli in Chai Badan district, Lopburi, supplying a Bangkok supermarket chain. One Monday morning he found brown planthoppers and kale caterpillars on every bed. Within seven days the entire farm was wilting, with an estimated loss of THB 1.8 million for that harvest cycle.

He tried to dispatch ten backpack-sprayer teams over three days — but the crop was already rotting and the supermarket refused delivery. The old way of spraying was no longer fast enough.

Brown Planthopper: Asia's Most Expensive Insect

Brown planthopper (Nilaparvata lugens) reproduces explosively. One female lays 100–200 eggs, and Thai monsoon heat and humidity accelerate the cycle to 5–7 days.

The insect drains sap from rice and leafy greens and transmits a virus that stunts plants. Thailand loses over THB 10 billion a year to this pest in rice alone.

The Department of Agricultural Extension recommends spraying biopesticides (BT, Beauveria bassiana, Metarhizium) or Neonicotinoid chemistry while the insects are still nymphs — before the outbreak peaks.

Five Pains the Farmer Faces

1. The full THB 800,000 of seed-cycle capital is lost.
2. Supermarket cancels — recovering the slot next season is hard.
3. Spraying 80 rai × THB 250 × 3 passes = THB 60,000 of crew cost and not fast enough.
4. Over-spraying to compensate produces residue above MRL — vegetables fail testing.
5. The farm forfeits its Thailand Safe Vegetable certification.

Why Backpack Sprayers Cannot Keep Up

Slow: a single crew does 5–8 rai per day. 80 rai needs 10–15 people over three days — planthopper outpaces them.

Wasteful: 30–40 L of mix per rai; chemical cost THB 250–400 per rai.

Big droplets: nymphs and eggs sit under leaves; coarse droplets fall to the ground first.

Labour shortage: hopper season overlaps with maize harvest. Workers are scarce and expensive.

What farmers need is a one-operator fogger covering 10–20 rai per hour, with droplets fine enough to coat under-leaf surfaces and 70% lower chemical usage.

Why Mr Tee Picked the Airofog U260

After watching a World Health Disinfection demo on YouTube, Mr Tee called for a trial. The team delivered a U260 and Beauveria bassiana biopesticide the same day.

Why U260 fits a working Thai farm: 5–50 micron droplets that reach the underside of leaves and contact eggs; 2–3 rai of coverage every 10 minutes — 80 rai in 4 hours; 0.5–1 L of solution per rai (70% savings); compatible with the biopesticides EU and Japanese supermarkets accept; 4.5 kg shoulder weight for working between vegetable rows.

In one night, Mr Tee fogged all 80 rai. The Beauveria spores contacted the planthoppers as they fed under the leaves. Within 5–7 days the hoppers were dead. 65% of the expected harvest was saved, and lab testing showed zero pesticide residue.

ULV + Biopesticides — a Game-Changing Pair

Biopesticides (BT, Beauveria, Metarhizium, neem oil, pyrethrum) work by direct contact with the pest. ULV's micron-scale droplets are the most efficient way to distribute living organisms across an entire crop.

Organic farms exporting to EU and Japan use ULV to apply tiny amounts of biopesticide across thousands of plants — lower cost, higher quality, and certification compliance for Organic Thailand, EU Organic, and USDA Organic.

10 Reasons Farmers Choose Airofog U260

1. 10–20 rai per hour — 80% time saving.
2. Penetrates under leaves — contacts eggs and nymphs.
3. 70% chemical savings vs backpack sprayers.
4. Biopesticide-compatible: BT, Beauveria, neem.
5. Compatible with modern chemistry: Neonicotinoid, IGR.
6. One-person operation.
7. Runs on 220 V or a field generator.
8. Helps achieve Organic / GAP certification.
9. One-year warranty, on-farm service.
10. WHD — call 065-556-6294, LINE @whd268.

Before vs After — the Lopburi Farm

Before: 80 rai of leafy greens collapsing, supermarket cancellation, THB 60,000 of crew fees not fast enough.

After (10 days): 65% harvest saved, supermarket accepts delivery, lab residue 0%. Next cycle Mr Tee will fog himself in a few hours.

Mr Tee — Lopburi Farmer

"After twenty years of backpack-sprayer back pain, I tried the Airofog U260. I fogged 30 rai in an hour and the planthoppers were dead. My kids told me I should have bought this years ago."

— Mr Tee, Chai Badan district, Lopburi

Change How You Spray Your Farm — Today

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