Kolar farmers grow tomato in several rounds through the year, raising 22 to 25 day seedlings and planting them on staked, mulched and drip-irrigated beds, then sending the crop in 15 kg boxes to the Kolar APMC market, described as the second largest tomato market in Asia after Nashik. The hard part in Kolar is not growing the crop but surviving two risks: leaf curl virus carried by whitefly, and prices that swing from under ₹100 to over ₹2,000 per box.
This guide covers the agronomy that works in the region's dry eastern zone, the varieties from ICAR-IIHR Bengaluru that carry disease resistance, and a break-even calculation per box so that you can judge your margin before the price is known.
Why Kolar tomato is different
- Market: The Kolar APMC yard is about 70 km from Bengaluru, covers about 25 acres. In normal times arrivals were about 7,000 quintals a day; in mid-2023 they fell to about 1,000 when leaf curl wiped out fields, and box prices jumped from about ₹150 in 2022 to about ₹2,000 in mid-2023 (the Kolar market recorded ₹2,200 per box at its peak).
- Disease: Tomato leaf curl Bangalore virus (ToLCBV), spread by whitefly, damaged over half the plants in 2023. Researchers quoted in the reporting said a new whitefly biotype resistant to existing pesticides was involved.
- Water: Growing tomato round the year on borewells is a real constraint. A 2021 ISEC study in Chintamani, next to Kolar, noted that the neighbouring Chikkaballapura district was declared over-exploited for groundwater in 2012, and that many farmers use far more fertiliser and plants per acre than the recommended package.
Varieties and hybrids
Reports from the region say that many hybrids in common use are susceptible to leaf curl virus, so disease-resistant material matters. ICAR-IIHR Bengaluru's tomato range includes:
| Variety (ICAR-IIHR) | Type | Yield and duration | Resistance / use |
|---|---|---|---|
| Arka Rakshak | F1 hybrid | 75 to 80 t/ha in about 140 days (30 to 32 t/acre) | Leaf curl virus (ToLCV), bacterial wilt, early blight; fresh market and processing |
| Arka Samrat | F1 hybrid | 80 to 85 t/ha in 140 days; fruit 90 to 110 g | ToLCV, bacterial wilt, early blight; released for zone VIII (Karnataka, Tamil Nadu, Andhra Pradesh, Kerala) |
| Arka Abhed | F1 hybrid | 70 to 75 t/ha, 140 to 150 days | ToLCV, bacterial wilt, early and late blight; fresh market |
| Arka Vikas | Open pollinated | 35 t/ha in 140 days | Open-pollinated; seed can be saved for a season |
| Arka Vishesh, Arka Apeksha | Processing types | 75 to 90 t/ha | For puree, paste, ketchup; an outlet when fresh prices collapse |
These are potential yields from IIHR trials with good management; expect lower on the farm. Buy seedlings or seed from a source that gives a bill and lot number, and ask your KVK which hybrid did best against leaf curl in your taluk this season.
Nursery and planting
- Seedling age: The ISEC study notes the recommended age is 22 to 24 days, stout, disease-free and viable, but 68% of surveyed farmers used 25 to 30 day seedlings and 19% used seedlings older than 35 days.
- Protect the nursery: Because whitefly transmits leaf curl virus from the first weeks, keep seedlings away from infected tomato fields and other hosts, and do not plant seedlings that look unhealthy. Enclosing trays under fine insect-proof net is a widely used precaution; ask your KVK or IIHR for specifications.
- Spacing: The ISEC reference for the region is 3 ft x 1.5 ft (about 90 x 45 cm), or about 9,990 plants per acre. IIHR suggests 60 x 45 cm for Arka Rakshak with staking. The ISEC survey found that 74% of farmers crowded about 14,900 plants per acre (3 ft x 1 ft), which raises leaf spot and leaf curl pressure and competes for water and nutrients.
- Timing: A trial in the region transplanted on 6 July. Growers here plant in several rounds through the year, and because everyone tends to plant at the same time, a crop that comes in after the main flush often gets a better price. Staggering your plantings across two or three rounds also spreads risk.
Planting rounds
| Round | Transplanting (Karnataka, as commonly reported) | Notes |
|---|---|---|
| Kharif | About June to July (an ISEC trial in the region transplanted on 6 July) | Heavier leaf spot and blight pressure in wet weather; staking and drainage matter |
| Rabi | About September to November | Cooler nights; check whitefly pressure early |
| Summer | About December to February | Needs assured water and the strongest water-saving set-up |
These windows come from general Karnataka reports, not from a Kolar-specific calendar, and growers in Kolar shift them to dodge disease and to catch better prices. Ask KVK Kolar for this season's advice.
Soil, manure and fertiliser
The ISEC study notes that nutrient management makes up about 46% of the cost of cultivation and that nearly 86% of the surveyed farmers did not soil test. Test first (Soil Health Card), then use the table as a starting point, not a target. Recommended doses differ by source, and the two rows below use different units (per hectare for IIHR, per acre for the ISEC study), so do not mix them up.
| Source | Organic matter | N : P2O5 : K2O |
|---|---|---|
| ICAR-IIHR, for Arka Rakshak | 5 t FYM per hectare | 120 : 80 : 60 kg per hectare (about 49 : 32 : 24 per acre) |
| ISEC study, Chintamani (local reference) | About 12 t FYM per acre; neem cake 100 kg per acre | 100 : 100 : 100 kg per acre (about 247 kg per hectare of each) |
The widest gap between these sources is in P and K, so soil test results matter. A tomato crop of 35 to 40 t/ha removes roughly 148 kg N, 20 kg P and 186 kg K per hectare according to the ISEC paper, so the nutrient bill is large and worth trimming with a soil test. Follow the fertilizers page for product options and apply nitrogen in splits.
Staking, mulch and drip
Staking keeps fruit off the soil and lowers rot; staking, drip and mulch are reusable investments (the ISEC paper notes that drip mains, laterals and stakes are reused crop after crop). Mulching plus drip also cuts water use and weeds; in ISEC's trial, a package with farmyard manure, recommended fertiliser, vermicompost, micronutrients, Trichoderma and mulch gave the highest yield. See drip irrigation for subsidy and solar pump options where borewell power is costly.
Pests and disease: what to watch
| Problem | How to recognise it | What to do |
|---|---|---|
| Leaf curl virus (ToLCBV) via whitefly | Upward curling, yellowing, stunting of young leaves; few fruits | Resistant hybrids; clean seedlings; yellow sticky traps and reflective mulch; rogue plants early; rotate insecticide groups on label advice; remove weed and old crop hosts |
| Tuta absoluta (tomato leaf miner) | Blotch mines in leaves, tunnelled fruit | Pheromone traps, clean up crop residues, biological agents such as Trichogramma, label-approved sprays |
| Bacterial wilt | Sudden wilting with green leaves | Resistant hybrids; do not repeat tomato, brinjal or chilli in a wilt field; drain well |
| Early and late blight, leaf spot | Concentric spots; dark water-soaked lesions in cool, wet spells | Wider spacing, staking, protective fungicide on label advice |
| Fruit borer | Holes in fruits | Pheromone traps, hand-picking, label-approved products |
Use only label-approved products at label doses and ask the KVK before changing the spray schedule. See the pests page.
Harvest, grading and selling at Kolar
- Box: Kolar sells in 15 kg boxes by auction. After commission, transport and labour charges are deducted, farmers have reported not recovering their costs when box prices fall to ₹80 to ₹200.
- Quality counts: In glut-season news reports (Deccan Herald, Hortidaily; the copies checked carried no clear date, so check the day's rate), good hybrid tomatoes fetched up to about ₹200 a box, native tomatoes up to about ₹150, and small blemished fruit about ₹80. Grade by size and colour, discard cracked fruit and pack in clean boxes.
- Watch neighbouring districts: Reports of oversupply point to expanded tomato area in Chitradurga, Tumakuru, Mysuru, Mandya and Chamarajanagar as well as Kolar. Check arrivals and rates at the tomato mandi page before committing your next plantings.
- Processing and bulk buyers: When fresh prices are poor, processing-type varieties and direct contracts are worth exploring; ask your KVK about buyers.
Cost and break-even per box
No verified current cost-of-cultivation figure for Kolar was available for this guide, so the break-even is shown as a formula you can fill with your own bills. Break-even price per 15 kg box is your total cost per acre (seed, seedlings, FYM, fertiliser, staking, mulch, drip, sprays, labour, picking, rent and interest) divided by boxes sold per acre. The table shows how it behaves for assumed costs and yields; these are illustrations, not averages.
| Total cost per acre (₹) | If 1,000 boxes/acre | If 1,500 boxes/acre | If 2,000 boxes/acre |
|---|---|---|---|
| 1,50,000 | ₹150 per box | ₹100 per box | ₹75 per box |
| 2,00,000 | ₹200 per box | ₹133 per box | ₹100 per box |
| 2,50,000 | ₹250 per box | ₹167 per box | ₹125 per box |
A box is 15 kg, so 1,000 boxes is 15 tonnes per acre (about 37 t/ha) and 2,000 boxes is 30 tonnes per acre. For reference, the ISEC study measured mean fruit yields of about 92 t/ha (about 37 t/acre) across its treatments in the Chintamani area in 2015-16, and 112 t/ha (about 45 t/acre) in its best-practice plot, which is a well-managed trial and not a typical farm. Sell prices above the break-even are your profit, but add market commission, transport and labour, which are deducted at the yard. When box prices are ₹80 to ₹200, many growers fall below break-even, and when they are ₹500 or more, the same acre earns several lakh rupees. That swing is the real risk in Kolar tomato. See PMFBY and the Kisan Credit Card pages for risk cover and credit.
Sources
- ICAR-IIHR: Tomato varieties
- ICAR-IIHR: Arka Samrat
- ISEC Working Paper 525 (Govindappa, 2021): Package of Practices of Tomato Cultivation in Semi-arid Region of Karnataka
- The Federal: How rise in tomato prices in Kolar is driving the surge across the country (July 2023)
- Hortidaily: Kolar tomato farmers suffer as prices drop
- AgriFarming: Tomato farming in Karnataka, areas, seasons, yield (seasons, general Karnataka)