Growing Mulberry Silkworms in Indore: Practical Farming Guide
Overview
This guide walks you through setting up mulberry orchards and silkworm rearing in Indore district. It’s written for growers who want a practical, field-ready plan — site selection, best varieties suited to central India, nursery and orchard practices, rearing steps (including chawki management), disease prevention, harvesting and basic marketing pointers.
Why Indore works for sericulture
Indore has a subtropical climate with hot summers, a pronounced monsoon and mild winters. Mulberry (Morus alba) adapts well here if you manage irrigation and protect young plants from extreme heat. Silkworms do best when you can control temperature and humidity during rearing — that’s achievable with simple structures and routines described below.
Choose the right variety
Selecting the right mulberry variety affects leaf quality, yield and worm performance. In central India growers commonly use improved S and V series mulberry clones developed for leaf yield and nutrition. When choosing, consult the local Krishi Vigyan Kendra (KVK) or State Sericulture Department for planting material certified for your area.
- Priority traits: high leaf yield, tender leaves, fast regrowth (after pruning), and tolerance to heat.
- Sourcing: buy disease-free disease-free rooted cuttings or saplings from certified nurseries.
Land, layout and planting
Site selection and planting layout determine how easy orchard maintenance and leaf harvest will be.
- Soil: well-drained, loamy soils are best. Avoid waterlogged pockets.
- Sunlight: full sun with some afternoon shelter for very young plants in hottest months.
- Planting season: early monsoon is ideal so young plants establish with minimal irrigation. If planting outside monsoon, ensure regular irrigation.
- Spacing: commonly 1.0–1.5 m between rows and 0.8–1.2 m between plants for high-density orchards; adjust spacing depending on pruning system and mechanisation.
- Irrigation: frequent during establishment; later switch to scheduled watering aligned with pruning cycles. Mulberry responds well to light but regular irrigation for consistent leaf quality is important.
Orchard management
Good leaf supply is key to effective silkworm rearing.
- Pruning: rotational pruning (prune blocks on a schedule) supplies tender regrowth for silkworms. Time pruning to have fresh flushes when you plan rearing cycles.
- Fertiliser: apply farmyard manure annually and balanced NPK fertilizer according to soil tests; split nitrogen applications to boost leaf growth before rearing cycles.
- Pest and disease: monitor common pests (leaf-eating caterpillars, aphids) and diseases (root rot in waterlogged soils, leaf spot). Use cultural controls first — good drainage, removal of affected parts — and approved pesticides only when necessary, avoiding residues before leaf harvest.
- Harvesting: pick leaves early morning or late afternoon to reduce wilting. Use only healthy, tender leaves for young instars (chawki). Avoid dusty or contaminated leaves.
Silkworm types and seed sourcing
Decide which silkworm race to rear: bivoltine gives higher-grade silk but needs tighter climate control; multivoltine is easier in warm climates and suitable for many small growers. There are also F1 hybrids used commercially. Obtain disease-free layings (eggs) from the State Sericulture Department or accredited seed producers. Never use backyard-sourced eggs without certification.
Rearing house and basic equipment
You don’t need high-tech facilities to start. Focus on a clean, relatively sheltered room where you can control temperature and humidity with simple tools.
- Structure: well-ventilated room with light shading. Avoid direct sun on rearing trays.
- Equipment: rearing trays/tables, sieves for cleaning, weighing scale, thermometer and hygrometer, disinfectants (lime, bleaching powder) for sanitation.
- Water and waste: plan for clean water supply for leaf washing (if needed) and safe disposal of used leaves and frass to avoid disease buildup.
Rearing stages and practical tips
Silkworm rearing has defined stages. Maintain discipline on feeding, sanitation and temperature/humidity.
- Incubation and hatching: incubate eggs at recommended temperature; transfer newly hatched larvae (neonate) to chawki (starter) trays within a few hours.
- Chawki (1st–3rd instar): these are the most vulnerable stages. Provide tender, young leaves cut into small pieces. Keep temperature moderate (commonly 24–28°C) and higher relative humidity (70–85%) during hot weather through evaporative cooling or misting, but avoid wetting larvae directly. Change leaves 5–6 times a day for neonates, reducing frequency as larvae grow.
- Middle instars (4th–5th): supply larger, denser leaf supplies. Increase tray area as larvae grow and maintain air circulation to prevent fungal problems.
- Spinning and cocooning: provide mounting frames or grasses for the last instar to spin on. Keep disturbance minimal; harvest cocoons after full maturity (white or off-white depending on race).
Hygiene and disease control
Sanitation prevents most losses.
- Disinfect trays and rearing rooms before each batch with lime or approved disinfectants.
- Remove and burn or compost diseased larvae and heavily contaminated bedding — do not keep near the rearing room.
- Maintain strict movement controls: separate different age groups and don’t mix cohorts. Use separate tools for chawki and late-stage rearing.
- Routinely inspect for signs of bacterial or viral disease (sick larvae that fail to eat, discoloration). When in doubt, contact the local sericulture laboratory for diagnosis.
Harvesting and post-harvest handling
- Harvest cocoons carefully to avoid damaging silk. Sort by size and appearance; sun-drying can be harmful, so dry under shade or in a controlled drying area as per local practice.
- For seed production, follow recommended procedures for stifling (killing the pupa) to secure quality. This is typically done using hot air or steam; get training from the sericulture department before attempting seed production.
- Record-keeping: track inputs, larval survival, cocoon yield and quality for each batch — essential to improve performance over time.
Marketing and value addition
Find buyers before starting — local cocoon markets, cooperative societies, private reelers and state-run procurement centres. Prices and demand fluctuate with season and silk grade. Consider joining or forming a growers’ group to aggregate produce and negotiate better terms.
- Reeling: raw cocoons are processed into raw silk by reelers. Small growers often sell cocoons to local reelers or cooperatives.
- Value addition: if you scale up, look into village-level reeling units or tie-ups with sericulture extension services.
Costs and scaling
Start small, learn one or two rearing cycles, and expand based on performance. Initial costs include saplings or cuttings, irrigation setup, a simple rearing room, trays and seed (eggs). Keep accurate cost records and work with the local sericulture officer to estimate profitability for your scale and chosen variety.
Where to get help in Indore
Consult the District Sericulture Office, KVK or nearby agricultural extension centres for:
- Certified planting material and disease-free layings.
- Hands-on training in chawki rearing and stifling.
- Local market contacts and current price information.
Practical checklist for first cycle
- Confirm land, soil and water supply; plant saplings at the right season.
- Source certified mulberry cuttings and disease-free silkworm eggs.
- Prepare a clean rearing room and basic equipment.
- Plan pruning and leaf harvest schedule to match rearing dates.
- Keep a daily log of feeding, temperature/humidity and larval survival.
- Arrange buyers before harvesting cocoons.
Final notes
Sericulture is labour- and attention-intensive but can fit small landholdings in Indore if you manage leaf supply and maintain hygiene. Use local extension services for training and seed/planting material. Start modestly, learn from each cycle and scale up with disciplined record-keeping and attention to leaf quality and disease control.