ELP Pest Surveillance and IPM Demonstration Unit for Tomato with KVK Support

Tomato supports thousands of small growers in every district, but its season is a fight against insects: the invasive South American tomato leafminer Tuta absoluta — first detected in India in 2014 and now widespread — alongside Helicoverpa armigera, Spodoptera litura, whiteflies and leafhoppers. Most farmers respond with calendar spraying decided by pesticide-shop advice, which raises costs, kills natural enemies, encourages resurgence and resistance.

This Experiential Learning Programme (ELP) module puts a five-student team in charge of a pest surveillance and IPM demonstration unit for one tomato season in a village cluster, mentored by a Krishi Vigyan Kendra (KVK) scientist. The team sets up a fixed-plot scouting network across 12–15 farmer fields, installs pheromone traps for the three key moths and yellow sticky traps for sucking pests, and converts every week's counts into a plain-language pest advisory issued through a WhatsApp group and printed bulletins.

The experiential core is a paired field demonstration in two host farmers' fields: an IPM module — trap-based monitoring, need-based spraying per KVK/university recommendations, neem and microbial insecticides, conservation of natural enemies, removal of infested plant parts — run side by side with the farmer's usual practice. The team records sprays, costs, fruit damage and yield in both plots, values the produce with Agmarknet prices, and computes plant-protection costs and benefit–cost ratios. The module ends with an ELP record, a business plan for a plant-health advisory unit, and a field day where the host farmers present their own results.

Tomato growers around most agricultural colleges spray insecticides on a fixed calendar, on suspicion, or on pesticide-shop advice, without any measurement of what pests are actually present in their fields. The result is a familiar cycle: high cost of plant protection, destruction of natural enemies, resurgence of sucking pests, and growing failure of molecules against pests such as the invasive leafminer Tuta absoluta, whose leaf- and fruit-mining habit shields it from poorly timed contact sprays. Extension machinery exists — the KVK, the agriculture department — but no one generates village-level, week-by-week pest information that a farmer can act on.

There is a need for a working surveillance-and-advisory unit, run by students as an experiential enterprise, that (a) monitors key tomato pests weekly across a village cluster with standard scouting and pheromone traps, (b) issues timely, plain-language advisories, and (c) demonstrates, in paired plots within host farmers' fields, whether an IPM module guided by monitoring can match or beat farmers' practice on yield, fruit damage and benefit–cost ratio.

Abstract

As its Experiential Learning Programme entry, the team runs a pest surveillance and IPM demonstration unit for tomato in a village cluster, with KVK mentorship. Weekly scouting and pheromone-trap counts feed a farmer advisory service, and a paired IPM-versus-farmers'-practice demonstration in two host fields measures the agronomic and economic case for monitoring-based plant protection.

Introduction

Tomato is grown through the year around most colleges, and its pests arrive in waves: leaf miners and leaf-eating caterpillars on the foliage, borers in the fruit, whiteflies and aphids on the sap, each carrying disease or opening the way to rot. Tuta absoluta, an invasive moth first reported in India in 2014, tunnels inside leaves and fruit where contact sprays barely reach, which is exactly why the default response — more frequent calendar spraying — has failed to contain it. Integrated pest management replaces the calendar with information: traps and scouting tell the farmer what is actually in the field, and interventions follow thresholds and need rather than habit.

Existing situation vs proposed unit

• Existing: farmers rely on the pesticide shop for diagnosis and dose; sprays are weekly and prophylactic; the same molecules repeat until they stop working; extension contact is occasional, usually at a training or field day; no one in the village records pest pressure systematically.
• Proposed: a student-run unit that maintains a continuous record of pest incidence across the cluster, issues a weekly one-page advisory in the local language, and demonstrates the alternative — an IPM module with trap-based monitoring, need-based spraying and biopesticides — in paired plots inside host farmers' own fields, with the economics worked out from real harvest data and Agmarknet prices.

Experiential and entrepreneurial component

ELP is assessed on running a real activity, not on watching one. The team procures traps, lures and biopesticide inputs, maintains stock and cash registers, prices its advisory service (a season subscription per acre, or input-plus-service bundles), and prepares a business plan for continuing the unit after the module. Every rupee in and out is recorded in the module's ledgers.

Feasibility

• Institutions: the KVK of the district is the natural mentor — it already issues advisories, stocks demonstration materials and hosts field days; the college's entomology faculty supervise the technical work.
• Costs: pheromone lures, sticky traps and neem/Bt inputs for two demonstration plots are affordable within an ELP budget; a two-wheeler covers the cluster weekly.
• Skills: scouting, trap servicing, spray planning and record keeping are exactly what the entomology and extension courses of the programme teach; Excel handles the analysis.
• Season fit: sixteen weeks cover a full rabi tomato crop from transplanting to final harvest, with the field day at harvest when the yield and damage data are fresh.

In scope

• One village cluster within easy weekly travel of the college, with 12–15 monitored tomato fields and two host fields for the demonstration.
• One full tomato season (rabi), from transplanting to final harvest.
• Key insect pests and natural enemies of tomato; disease observations only as advisory context.
• Advisory service, paired IPM demonstration, cost economics and the ELP business-plan deliverables.

Out of scope

• Pesticide-residue laboratory analysis of harvested fruit.
• Formal replicated field-trial statistics across many farms (the demonstration is a paired practical comparison in two fields).
• Disease-focused plant pathology work and biological-control mass production.
• Continuous year-round operation beyond the module period (proposed in the business plan instead).

The module runs as a student-operated service plus field demonstration over sixteen weeks, aligned with a single tomato season.

Measurements: pest incidence as the percentage of infested plants per field; trap catches per week; fruit damage as the percentage of damaged fruit by number and weight in each picking's sample; yield in quintals per hectare; plant-protection cost covering traps, lures, products and labour. Thresholds and recommendations are taken in writing from the KVK and the university's package of practices — never from memory. Honesty rule: missed weeks, spray refusals and off-method farmer actions are recorded as they happen; the report explains them instead of smoothing them over.

The module's operating design, reproduced as the study-flow figure in the ELP record:

flowchart TD
  A["ELP team of five students with KVK scientist as mentor"] --> B["Select village cluster and tomato fields with written farmer consent"]
  B --> C["Weekly fixed-plot scouting: five points per field, five plants per point"]
  B --> D["Pheromone traps for Tuta absoluta, Helicoverpa, Spodoptera plus yellow sticky traps"]
  C --> E["Weekly pest record: incidence percentage, larval counts, natural enemies"]
  D --> E
  E --> F{"Pest pressure above the KVK-recommended advisory level?"}
  F -- no --> G["Advisory: no spray, conserve natural enemies, remove infested parts"]
  F -- yes --> H["Advisory: need-based IPM recommendation per package of practices"]
  G --> I["WhatsApp group and printed bulletin to participating farmers"]
  H --> I
  I --> J["Paired demonstration in two host fields: IPM module vs farmers' practice"]
  J --> K["Log every spray, cost, fruit damage and yield for both plots"]
  K --> L["Valuation with Agmarknet prices; plant-protection cost and B:C ratio"]
  L --> M["ELP record, advisory-unit business plan, field day and viva"]

The IPM module vs farmers' practice

Data flow

Field sheets and trap counts go into one Excel workbook the same evening: one sheet per week per field, a summary sheet for incidence and traps, and an economics sheet that pulls harvest weights and the week's Agmarknet price. The advisory is drafted from the summary sheet, checked by the KVK mentor over phone or WhatsApp, and only then issued — the students advise, the mentor confirms, the farmer decides.

• Extend the unit to a second cluster and add brinjal or chilli, so the advisory runs across crops and seasons.
• Add a small biopesticide and Trichoderma production line, sold through the advisory service, to deepen the ELP business component.
• Partner with a local FPO to deliver the advisory on a subscription basis to member farmers.
• Digitise the pest record into a simple village pest map and test a weather-based alert for whitefly and leafminer build-up.
• Collaborate with ICAR-IIVR or the state agricultural university on testing improved IPM modules or new lure formulations in the same plots.