Crop details
Sword bean (Canavalia ensiformis)
Categories
Quick stats
| Family | Fabaceae |
|---|---|
| Typical harvest | 5.7 t/ha |
| Varieties | 1 |
| Pests & diseases | 5 |
| Seasons | 1 |
Crop profile
| Growth habit | climber |
|---|---|
| Days to harvest | 120-180 |
| Main uses | Green manure; pulse |
| Pollination | insect |
| Origin / where it grows | Tropics |
Weather, soil & spacing
| Best temperature | 22–30 °C |
|---|---|
| Rainfall | 900–1500 mm/yr |
| Altitude | 0–1600 m |
| Best pH | 5.5–6.8 |
| Soil type | Light to medium soils |
| Row spacing | 100 cm |
| Plant spacing | 50 cm |
| Planting depth | 3 cm |
| Seed rate | 25 kg/ha |
| Nursery days | — |
Simple notes for farmers
About the crop: This crop has a growth habit described as "climber". You can normally start harvesting about 120-180 days after planting, depending on care and variety.
Main use: Farmers mostly grow this crop for green manure; pulse.
Pollination: This crop is mainly pollinated by insect. Keeping flowers healthy and having insects like bees in the field helps improve fruit set and yields.
Where it grows: Tropics It is grouped under: Legumes & Pulses.
Best climate: This crop does well in warm areas where the temperature is usually between 22 and 30 degrees Celsius. It prefers places that receive around 900 to 1500 millimetres of rain in a year. It can grow from near sea level up to about 1600 metres above sea level.
Soil: The crop grows best in slightly acidic to near neutral soils, with a pH of about 5.5 to 6.8. It does well in light to medium soils. Good drainage is important, so avoid waterlogged spots.
Plant spacing: Plant in rows about 100 centimetres apart, and leave about 50 centimetres between plants in the row. This gives each plant enough space for roots and canopy to spread.
Planting depth: Dig planting holes or furrows about 3 centimetres deep so the roots sit firmly in the soil but are not buried too deep.
Seed or planting material: Use around 25 kilograms of seed or planting material per hectare. Spread or plant evenly so the field has a good stand without being overcrowded.
Farmer guide (mwongozo wa mkulima)
Nutrient schedule (mbolea kwa hatua)
| # | Stage | DAP | Product | Rate | Targets (kg/ha) | Notes |
|---|---|---|---|---|---|---|
| 1 | Basal | 0 | NPK 15-15-15 | 50 kg/ha | N: —, P₂O₅: —, K₂O: — | Or DAP+MOP equivalent; keep away from seed inoculant |
| 2 | Early pod set (opt.) | 40 | Sulfate of potash (SOP) | 40 kg/ha | N: —, P₂O₅: —, K₂O: 20 | Skip if soil K is adequate |
Nutrient requirements
| Nutrient | Stage | Amount | Unit |
|---|---|---|---|
| N | Basal | 0 | kg/ha |
| P₂O₅ | Basal | 20 | kg/ha |
| K₂O | Basal | 20 | kg/ha |
| N | Topdress | 0 | kg/ha |
| P₂O₅ | Topdress | 0 | kg/ha |
| K₂O | Topdress | 20 | kg/ha |
Field images (picha shambani)
| Name | Country | Maturity | Traits |
|---|---|---|---|
| Local Canavalia | KE | 150 | Vigorous |
| Stage | Product | Rate (kg/ha) | Notes |
|---|---|---|---|
| Basal | NPK 15-15-15 | 50 | Or banded P+K sources |
| Pod set | Sulfate of potash (SOP) | 40 | Apply only if K is low |
| Name | Type | Symptoms | Management |
|---|---|---|---|
| Pod borers | pest | Pod damage | Frequent picking; sanitation |
| Pod borers (Helicoverpa/Maruca) | pest | Bored pods; seed damage | Flower–pod scouting; threshold sprays; timely harvest |
| Leaf beetles | pest | Defoliation; shot-holes | Early control if severe; conserve natural enemies |
| Aphids | pest | Leaf curl; honeydew/sooty mold | Control ants; soft insecticides; encourage predators |
| Root rots (Rhizoctonia/Pythium) | disease | Damping-off; root lesions | Well-drained fields; seed treatment; avoid overwatering |
| System | Typical | Min | Max | Notes |
|---|---|---|---|---|
| green manure | 8 | 4 | 12 | Biomass (DM) |
| green manure (biomass DM) | 8 | 4 | 12 | Dry matter biomass |
| rainfed seed | 1 | 0.6 | 1.8 | Clean seed under good management |
| Country | Region | Planting | Harvest |
|---|---|---|---|
| KE | Humid lowlands | Mar–Apr | Jul–Nov |
| Country | Region | Suitability |
|---|---|---|
| KE | Humid lowlands | High |
| TZ | Coastal belt | High |
| UG | Lake Victoria basin | Medium |