Drone and spotter maps that turn tea estate pest flags into spot-spray orders
TL;DR Teaspot digitises the pest-spotting system Indian tea estates already run on paper and coloured flags. Spotters log hotspots on phones, a drone flies each section every week or two, and the estate gets a map of where to spray and nothing more. Estates pay per hectare per season to cut blanket spraying and residue risk.
Tea Board's own code says the industry loses 15–30% of its crop to pests, diseases and weeds even after spraying[1]. A 2026 review puts India's 2024 shortfall at 160–170 million kg, with Assam down about 11% and West Bengal about 21% by July, partly from pests[2].
The code asks estates to skip blanket sprays and treat early hotspots instead[1]. In practice that rests on spotters walking blocks and planting flags around infested bushes. On gardens spread across hundreds of hectares the flags get missed, records stay on paper and managers fall back on spraying whole sections.
Residue limits make that expensive. India's limit for fenazaquin on tea is 3 mg/kg, and an EU import tolerance for Indian tea was still under review in 2026[3].
What it does, in regulatory terms: pest monitoring and spray planning only. Teaspot recommends only formulations listed in the Plant Protection Code at its stated doses[1]. Spraying stays with the estate's own squad unless the chosen pesticide is cleared for drone use, and flights follow India's drone rules[4].
Spotters carry a phone app instead of flags. They photograph damage, tag the bush and the app pins it to a section map. Every 7–14 days in the flush season a small drone with an ordinary or multispectral camera flies each section, and a model flags patches whose leaf colour or canopy has changed since the last flight. The two layers merge into one daily list - these bushes, this pest, this formulation from the code, this waiting period before plucking. After the spray the spotter closes the job with a photo, which builds a residue-ready record per section.
I narrowed the seed, which pitched hyperspectral drones and precision treatment for crop loss in general. Hyperspectral sensors are costly and the target pests show up on cheaper cameras anyway. Field crops already have drone scouting offers. Tea estates already pay spotters and already have a written spot-spray policy, so the habit is there.
The estate pays. Spotters and section managers use it, and the garden manager or the group's head of plantation operations signs off. My guess is a per-hectare season fee, priced below the cost of the spray rounds it saves, but that's untested. Is there a second buyer? Yes, the export team, which wants section-level spray records it can show buyers who ask about residues.
The Plant Protection Code moved to version 19 in April 2026 and still pushes spot spraying over blanket rounds[1]. India's 2021 drone rules cut approvals from 72 to 4 and set a ₹100 registration fee[4], so flying over private estates is routine now. Residue limits on Indian tea were under formal EU review in 2026[3].
There's no public figure for what estates spend on pest scouting or spraying. The firmest signal is the stated 15–30% crop loss after treatment[1] and the 2024 production shortfall of 160–170 million kg[2]. The drone review estimates drone spraying uses 60–70% of the chemical of conventional methods[4], which is adjacent evidence that targeting cuts input use, not proof for tea.
One US-Israeli agtech firm sells drone imagery at leaf level with AI detection of insect damage, mainly through crop advisors[5]. A large Indian drone company offers crop monitoring and precision spraying as a drone service, with no tea-specific product on its site[6]. The real incumbent is the estate's own flag system[1].
I found no Indian product built around tea pests and the code, though my search was limited.
| Difficulty | Hard (54/100) |
| Starting capital | ₹1.2–2.2 Cr |
| Time to launch | 9–12 months |
Detecting tea mosquito bug damage from the air early enough to matter is unproven, so you'll need a season of ground truth per region. Monsoon weather grounds drones in peak pest months, which is just bad luck. And estates are conservative buyers who trust their head spotter over software.
Yes. The software needs no licence, but drones and pesticide advice both sit under rules you can't skip.
Building this outside India? The categories above usually have a local equivalent, so check with your own regulator.
Don't let AI pick a chemical on its own. Teaspot monitors and plans, and a person checks every spray order against the code.
Want to work out the AI layer for Teaspot? Talk to Yash →
Here's what can go south -
I think it's worth trying if you have tea estate experience and a co-founder who can build image models. If you're a drone hardware team looking for a market then this is not it. Prove first, on two estates over one flush season, that hotspot maps cut sprayed area by a quarter without more crop loss than the control sections.
My estimate is ₹1.2–2.2 Cr to launch, covering drones, cameras, the app and a field team for the first seasons.
Yes. Each drone has to be registered and flown by a certified remote pilot under the Drone Rules 2021, and any pesticide you recommend has to be registered and listed in the Plant Protection Code.
Probably. Plantation crops everywhere have scouting crews, so the model travels. Drone and pesticide rules change by country though, so check those first.
The free Teaspot validation kit has the line-by-line capital breakdown, the effort scoring, the drone, pesticide and residue checklist, a 14-day validation sprint with pass/fail targets, a 90-day launch plan, 10 interview questions for estate managers, and 5 assumptions to test. Download the kit →
Thinking about building Teaspot or something close to it? The make-or-break work is showing that aerial maps find hotspots earlier than an experienced spotter, and that's the kind of thing I help founders test. If you need a hand, you know where to find me. Talk to Yash →
For illustration only. Names are fictional and ideas hypothetical; sourced facts are real but may be out of date. Nothing here is legal, financial or professional advice, and Yash Khatri is not personally liable for any use of it. Read the full disclaimer.