Mulberry (Shahtoot) Cultivation in Manipur: Practical Guide
Why grow mulberry in Manipur?
Mulberry (Morus spp., commonly called shahtoot) fits Manipur’s humid subtropical climate — warm summers, chilly winters in higher elevations, and reliable monsoon rainfall. It’s the essential feed crop for silkworms (sericulture) and also produces edible fruit that can provide an extra cash stream. This guide focuses on practical, field-tested steps: land and variety choice, propagation, planting, cultural care, harvest, pest management and selling options.
Varieties and end use
Choose a variety according to your end use:
- Morus alba (white mulberry) — most common for sericulture; fast-growing, high-leaf yield, preferred by Bombyx mori.
- Morus rubra / alba hybrids — some have better fruit quality; consider if selling fresh fruit is a priority.
- Local landraces — check with nearby sericulture extension or farmers; local clones are often well adapted to microclimate and pests.
Site selection and soil
Mulberry tolerates a range of soils but performs best on deep, well-drained loam with good organic matter. Avoid waterlogged spots where roots can rot. Choose a site with:
- Full sun or light shade (trees will leaf faster under full sun).
- Protection from strong, cold winds if planting at higher elevations.
- Access to irrigation for dry spells and for leaf production cycles used in sericulture.
Propagation methods
Common, reliable methods for smallholders:
- Hardwood cuttings — taken in late winter or early spring, 30–40 cm long with 2–4 nodes. Plant directly in nursery beds or in the field at an angle; keep moist.
- Root suckers — lift and replant young suckers in the rainy season; fast establishment and true to type.
- Air-layering and grafting — used to multiply elite trees with known fruit quality; requires more skill but gives earlier fruiting.
Nursery and planting
Raise plants in a protected nursery for 3–6 months if using cuttings or rooted suckers. Harden off before transplanting.
Planting time: in Manipur, the best time is early monsoon (May–July) when soil moisture aids establishment. In well-irrigated sites, early spring planting also works.
Planting layout depends on purpose:
- For sericulture (leaf production): closer spacing, e.g., 2–3 m between rows and 1.5–2.5 m within rows, to allow frequent pruning and easy leaf harvest.
- For fruit production or timber: wider spacing, e.g., 4–6 m between trees to allow crown development.
Before planting, dig pits 45–60 cm wide and deep. Mix topsoil with well-rotted farmyard manure (FYM) or compost and, if available, a balanced NPK based on soil test. Backfill and firm soil around the rootball; water immediately.
Fertilization and nutrition
Mulberry responds well to organic manures and balanced fertilizers. Practical recommendations:
- Apply well-rotted FYM or compost annually around the root zone to maintain structure and microbial activity.
- If using chemical fertilizers, base rates on a soil test. As a rule of thumb, split nitrogen applications support leaf regrowth: apply some at the start of the growing season and follow up after each major pruning or harvest cycle if you are producing leaves for silkworms.
- Micronutrients: monitor leaf colour and growth — zinc or boron deficiencies occasionally occur and can be corrected with foliar feeds or soil application following extension advice.
Irrigation and water management
Mulberry is fairly drought-tolerant once established but young plants and leaf-production blocks need regular water. Practical points:
- Provide more frequent watering during dry spells and spring leaf flushes used in sericulture.
- Avoid prolonged waterlogging — ensure beds drain well.
- Use mulching (straw, leaves) to conserve moisture and suppress weeds.
Pruning and training
Pruning is central to mulberry management and depends on your objective:
- Leaf production (sericulture): practice coppicing or pollarding to produce multiple shoots and repeated leaf harvests. Short rotation pruning every 6–8 months encourages tender, palatable leaves.
- Fruit-focused trees: shape young trees for 3–4 scaffold branches; prune to open the canopy and remove crossing branches to improve fruit quality and harvest access.
- Always use clean, sharp tools; remove diseased or dead wood promptly.
Pests and diseases — field-level management
Common issues in Manipur:
- Pests: leaf-eating caterpillars and some aphid outbreaks. Monitor regularly and use mechanical control or biocontrol (BT for caterpillars, neem sprays, conserve natural enemies).
- Diseases: leaf spot and powdery mildew can appear in humid conditions. Remove and destroy infected leaves, improve air circulation by pruning, and use copper-based fungicides or recommended organic alternatives if needed.
- Root rot: avoid waterlogged soils and practice good drainage; treat affected trees early and consider replanting on raised rows.
For sericulture, ensure leaves are free of pesticide residues when supplying to cocoon rearers.
Harvesting leaves and fruit
Timing and method depend on use:
- Leaves for silkworms: Harvest tender leaves and shoots regularly according to rearing schedules. Younger leaves are preferred; harvest in the cool of the morning to reduce wilting and transport losses.
- Fruit: Harvest when fruits are fully coloured and sweet; pick gently to avoid bruising. Mulberry fruit is perishable — handle carefully.
Post-harvest handling and value addition
Leaves:
- Deliver leaves to cocoons rearers quickly — keep shaded and cool. For longer transport, lay leaves in crates with ventilation; avoid piling too high.
Fruit:
- Sort to remove damaged or underripe fruit. Sell quickly to local markets or use on-farm processing: jam, squash, wine or dried products extend shelf life and increase returns.
- Small-scale packaging in clean crates or baskets keeps fruit market-ready for local consumers.
Marketing and selling options in Manipur
Consider multiple market channels depending on scale and end product:
- For sericulture: supply directly to local silk rearers or cooperative societies. Timing and consistency matter more than price — reliable daily or weekly supply contracts are valuable.
- Fresh fruit: local markets and roadside stalls around Imphal and district towns, restaurant or hotel supply, and local fruit vendors are practical outlets.
- Value-added: jams, squashes, and preserved fruit can be sold to tourists, at farmers’ markets, or through community groups; small processing increases shelf life and price.
- Cooperatives and groups: joining farmer groups or sericulture extension networks helps with collective bargaining, access to improved planting material and inputs, and market access.
Record-keeping and scaling
Keep simple records of planting dates, pruning cycles, yields (leaf harvests per cycle), inputs used and buyers. This practical data helps you adjust pruning frequency, fertiliser timing and identify the most profitable mix of leaf vs fruit production. When scaling up, stagger plantings to smooth labour and harvest peaks.
Practical tips from the field
- Start small: establish a few lines for leaf production and a few trees for fruit; learn local pest timing and labour needs before expanding.
- Use local materials: collect leaf mulch, compost household waste and animal manure to keep costs low and soil health high.
- Coordinate with nearby rearers: synchronized leaf supply reduces waste and builds reliable customers.
- Protect leaf harvests from contamination: do not spray pesticides shortly before harvesting leaves destined for silkworms.
Where to get help
Contact local sericulture extension centres, Krishi Vigyan Kendra (KVK) in Manipur, or the state horticulture department for region-specific planting material, technical advice and possible subsidies for planting material or irrigation.
Summary
Mulberry is a resilient, multi-purpose crop well suited to Manipur. Focus on choosing the right variety for your goal (leaf vs fruit), establish good nursery and planting practices, maintain regular pruning and fertilisation tailored to production cycles, and build reliable local market links. With careful management, mulberry can supply steady feed for sericulture and provide an extra fruit income for smallholders.