Mulberry Silkworm in Uttarakhand: Sowing to Selling Guide
Overview
Sericulture (mulberry and Bombyx mori silkworm rearing) is a suitable enterprise across many parts of Uttarakhand where soil, temperature and irrigation are managed. This guide walks you from land and sapling selection through routine leaf production and day-by-day silkworm rearing to harvesting cocoons and selling them. The focus is practical field steps and small-to-medium scale production practices that work on hill farms and valley plains.
1. Site selection and soil preparation
- Altitude and climate: Mulberry grows from low plains up to mid-hills. Choose sites with access to water and protection from frost pockets for young leaves and silkworms.
- Soil: Deep, well-drained loam with good organic matter is ideal. Avoid waterlogged spots. On sloping land, use contour planting and terraces to control erosion.
- Land preparation: Clear weeds and perennial grasses. Plough and incorporate well-decomposed farmyard manure or compost at planting. Raise beds or ridges if drainage is uncertain.
2. Mulberry cultivar and planting
Choose cultivars adapted to your microclimate and intended use (leaf for feed, or both leaf and firewood). In Uttarakhand, growers commonly use locally recommended high-yielding varieties—consult the nearest sericulture extension for cultivar guidance.
- Propagation: Mulberry is usually grown from rooted cuttings (hardwood cuttings) taken during the dormant season. Nursery-propagated saplings reduce initial losses.
- Planting time: Planting is best at the beginning of the monsoon or in early spring where irrigation is available.
- Spacing: For leaf production, common spacings are 1.5–2.5 m between rows and 0.5–1.0 m within rows depending on training system. Closer spacing increases early leaf yield but requires more pruning.
- First-year care: Keep soil moist until roots establish. Mulch and weed control are critical. Apply 10–20 t/ha of well-rotted manure or compost in the first year split across seasons.
3. Pruning, training and leaf management
- Training system: For commercial leaf production, use pollard or hedge row systems that allow mechanized or manual plucking. On small farms, manage bushes with regular pruning to maintain a 1–1.5 m harvestable height.
- Pruning schedule: Regular shoot pruning after harvest cycles encourages fresh flushes. A clear pruning and harvest calendar tied to silkworm rearing cycles is essential to ensure continuous green leaf supply.
- Irrigation and fertilizer: Apply nitrogen-rich fertilizer to boost leaf growth. Frequent irrigation during dry spells maintains leaf quality; avoid over-watering before harvest to prevent dilution of leaf nutrients.
- Pest & disease control: Monitor for root rot, powdery mildew, leaf spot and common insect pests. Use integrated approaches—remove diseased material, keep good airflow, and apply authorized plant protection products when necessary.
4. Leaf harvesting and storage for silkworm feed
- Harvest leaves early in the morning when they are turgid and tender. Avoid very old, tough leaves and leaves with spots.
- Handle leaves carefully to avoid contamination with dust, soil or pesticides. Store leaves in cool, shaded boxes and use quickly; silkworms need fresh leaves multiple times a day depending on age.
- Plan planting density and pruning to match the calendar of rearing cycles so fresh leaf is available on demand.
5. Choosing silkworm breed and eggs
Select silkworm breeds suitable for your location and market (bivoltine for higher-quality silk, multivoltine for adaptability). Procure disease-free layings (DFLs) and fresh eggs from reputable government or private supply stations.
- Check the egg hatching percentage and request health certificates where available.
- Store eggs under recommended conditions (cool, dry) before incubation—follow supplier instructions precisely.
6. Rearing house and hygiene
- Rearing house: Use clean, well-ventilated rooms with protection against direct sunlight and drafts. Maintain temperature and humidity suited to the larval stages; control differs with local climate and season.
- Hygiene: Sterilise trays, tools and surfaces. Keep footwear and clothing for the rearing area separate. Disinfect hands and equipment when moving between batches to prevent disease spread.
- Isolation: Keep batches of different ages separate. Quarantine new batches if disease is suspected.
7. Incubation and initial rearing steps
- Incubation: After receiving eggs, incubate at the recommended temperature until hatching. Timing varies with breed and season—follow supplier guidance.
- First feeding: Newly hatched larvae (1st instar) need very tender, dust-free leaves; small, chopped leaf pieces on clean trays work well. Feed multiple times per day for high survival.
- Tray rearing: Move larvae to progressively larger trays as they grow. Maintain clean trays and replace leftover leaves frequently.
8. Daily feeding and care through instars
- Silkworms have 4–5 instars depending on breed. Feeding frequency and quantity increase rapidly—monitor consumption and growth and adjust feed amounts.
- Keep temperature and humidity stable. In Uttarakhand, night temperatures in hills can drop—use insulation or heating during cooler months; ventilate and shade in warmer valleys.
- Remove diseased or dead larvae promptly to avoid contamination. Keep records of mortality and possible causes.
9. Mounting and cocooning
- When larvae start wandering to pupate, transfer them gently to mounting frames, bamboo sticks or trays that provide good anchorage for cocoon formation.
- Ensure clean, dry conditions during spinning. Avoid disturbances and pests (ants, wasps) during cocooning.
- Record age and date of mounting to schedule harvest.
10. Harvesting, grading and storage of cocoons
- Harvest cocoons when spinning is complete and larvae have pupated; timing varies by breed. Handle cocoons gently to avoid damaging silk filaments.
- Grade cocoons by weight, compactness and colour depending on buyer requirements. Keep diseased or irregular cocoons separate.
- Store cocoons in dry, ventilated conditions. If reeling on-farm is planned, maintain optimal conditions until reeling.
11. Marketing and selling cocoons
- Know your market: local silk reeling units, primary purchasers, cooperatives and state-run procurement centres are common buyers. Build relationships before harvest seasons.
- Quality matters: buyers pay premiums for healthy, well-graded cocoons with minimal dead pupae and consistent supply. Follow grading standards used by your buyers.
- Timing and aggregation: Harvests clustered in time can depress prices; consider staggered rearing cycles or collective marketing with neighbours to negotiate better prices.
- Value addition: If you have access to small reeling units, converting cocoons to raw silk can increase returns but requires equipment, skills and reliable markets.
12. Record keeping and economics
Track inputs (saplings, labour, feed, chemicals), outputs (leaf yield, DFLs used, cocoons produced), mortality and sales. Records help identify problems, improve timing and calculate enterprise profitability. Start small, maintain strict hygiene and scale up as you gain consistent results.
Practical tips for Uttarakhand growers
- Match cultivar and silkworm breed to altitude and seasonal temperature swings; consult local extension for recommended combinations.
- Use mulching and contour measures on slopes to conserve soil moisture and reduce labour for weed control.
- Plan leaf production calendar around monsoon and winter cold spells—shade or protective structures can extend viable rearing months.
- Form producer groups to access DFLs, technical training and collective marketing; group bargaining is often more effective.
Conclusion
Mulberry and silkworm rearing can be a practical, income-generating activity in Uttarakhand if you align cultivar choice, planting, pruning and leaf supply with disciplined rearing practices and hygiene. Start with a manageable number of DFLs, keep meticulous records, and build links to reliable buyers. Local sericulture extension services can provide breed recommendations, disease diagnosis and market contacts—use them early and often.