Cowpea — Package of Practices
A short-duration warm-season legume for grain, vegetable pods or fodder — treat seed with Rhizobium, sow direct on well-drained soil, and keep nitrogen low as the crop fixes its own.
Overview
Cowpea is a versatile warm-season legume (pulse) grown for dry grain, tender green pods as a vegetable, and as fodder or green manure.
As a legume it fixes atmospheric nitrogen with Rhizobium bacteria, needing little nitrogen fertiliser and improving the soil for the next crop. It is short-duration and fairly drought-tolerant. Types range from bushy to spreading and semi-trailing. No specific cultivar is named here.
Climate & season
Cowpea needs warm weather (about 25–35 °C) and full sun; it tolerates heat and moderate drought but not frost.
- Grown in the kharif (rainy) and summer seasons in the plains.
- It is sensitive to frost and to cold, wet conditions.
- It stands moderate drought better than many pulses once established.
Soil & land preparation
Cowpea grows on a wide range of well-drained soils, best on sandy loam to loam at a pH of 6.0–7.5. It dislikes waterlogging and salinity.
- Prepare a well-drained, weed-free seedbed.
- Mix in well-rotted farmyard manure.
- Avoid waterlogged and saline-alkaline soils.
- Being a legume, it leaves the soil richer for the following crop.
Choosing a type & material
Select by purpose (grain, vegetable, dual-purpose or fodder) and by plant type (bushy, spreading or semi-trailing) and duration. Seed is sown directly. No specific cultivar is named here.
Planting material
- Use fresh, healthy, good-germination seed.
- Match the type to the purpose — bushy for grain, longer types for vegetable pods or fodder.
- Seed rate is about 20–25 kg/ha for grain, more when sown close for fodder.
- Reject shrivelled, damaged or old seed.
Preparation
- Treat seed with fungicide first, then inoculate with Rhizobium and PSB just before sowing.
- Keep inoculated seed out of direct sun and sow the same day.
- Sow at 3–5 cm depth into moist soil.
- Ensure good seed-to-soil contact for even emergence.
Planting & spacing
- Prepare a well-drained seedbed and mix in farmyard manure.
- Treat seed with fungicide, then coat with Rhizobium + PSB inoculant.
- Sow direct on flat or ridges — about 30 × 10 cm for grain, wider (45 × 15 cm) for spreading types, closer for fodder.
- Sow at 3–5 cm depth into moisture.
- Keep the field weed-free in the first 30–40 days.
- Provide light support for trailing types grown for vegetable pods.
Nutrient management
Figures below are a general guide per hectare — as a legume, cowpea needs only a small starter dose of nitrogen and more phosphorus. Adjust to soil test.
| Input | Dose (per ha) | Notes |
|---|---|---|
| Farmyard manure | 8–12 t | Mix in at land preparation Basal |
| Nitrogen (N) | 15–20 kg | Small starter dose only — the crop fixes the rest Basal |
| Phosphorus (P₂O₅) | 40–60 kg | Full dose basal — boosts nodulation and yield Basal |
| Potassium (K₂O) | as per test | Apply basal where soils are low Basal |
| Rhizobium + PSB | seed treatment | Inoculate seed before sowing Bio |
Water management
Cowpea is largely rainfed in the kharif season but responds to irrigation in summer.
- In the rains, grow mostly on rainfall with drainage in wet spells.
- In summer, irrigate at sowing and then at critical stages.
- Most critical stages are flowering and pod filling.
- Avoid waterlogging — it harms nodulation and roots.
Intercultural & crop management
- Keep the crop weed-free for the first 30–40 days with one or two weedings.
- Earth up lightly and mulch to conserve moisture.
- For vegetable use, pick tender pods regularly to keep the plant flowering.
- It intercrops well and can be ploughed in as green manure.
- Protect nodulation by avoiding excess nitrogen and waterlogging.
Plant protection
| Problem | Type | Watch for | Manage |
|---|---|---|---|
| Aphids & jassids | Pest | Colonies sucking sap on shoots and pods; honeydew; virus spread | Yellow sticky traps, neem, a recommended insecticide at threshold |
| Pod borer (Maruca / Helicoverpa) | Pest | Webbed flowers and bored pods with holes and frass | Pheromone traps, remove webbed buds, a recommended insecticide |
| Pod-sucking bugs | Pest | Bugs sucking developing pods; shrivelled, spotted seed | Field sanitation, a recommended insecticide at podding |
| Whitefly | Pest | Tiny white flies under leaves; sooty mould and virus spread | Yellow sticky traps, neem, a recommended insecticide |
| Anthracnose / leaf spot | Disease | Sunken dark spots on pods, stems and leaves in wet weather | Clean seed, rotation, recommended fungicide |
| Root rot / wilt | Disease | Yellowing and sudden drying in patches; rotted roots | Treated seed, drainage, rotation, avoid waterlogging |
| Powdery mildew | Disease | White powdery patches on leaves late in the season | Airflow, recommended fungicide or sulphur |
| Cowpea mosaic | Virus | Mottled, distorted leaves; stunting — spread by insects | Clean seed, control aphids and whitefly, rogue out plants |
IPM-first routine
- Start with treated, inoculated seed on a well-drained field.
- Keep the crop weed-free early and avoid waterlogging.
- Rogue out virus-affected and wilted plants promptly.
- Scout weekly; use pheromone and sticky traps at flowering.
- Favour natural enemies, neem and bio-agents first.
- Use recommended chemicals only at threshold, rotating modes of action.
Use crop-protection inputs safely
Always read the product label and follow it. Use the correct dose — more is not safer or better. Wear protective clothing (gloves, mask, full sleeves) while mixing and spraying, and respect the pre-harvest interval before you pick. Put IPM and cultural methods first and treat chemical sprays as a last resort.
Harvesting & yield
Harvest depends on the purpose — grain, vegetable pods or fodder.
- For grain, harvest when pods are dry and mature; dry, then thresh and clean the seed.
- For vegetable, pick tender green pods every 3–4 days before the seed swells.
- For fodder or green manure, cut or plough in at about 50% flowering.
- Dry grain well before storage to avoid bruchid (storage weevil) damage.
- Typical yield: about 1.0–1.5 t/ha of grain, with higher green-pod or fodder yields.
Cowpea — Package of Practices
A short-duration warm-season legume for grain, vegetable pods or fodder — treat seed with Rhizobium, sow direct on well-drained soil, and keep nitrogen low as the crop fixes its own.
Overview
Cowpea is a versatile warm-season legume (pulse) grown for dry grain, tender green pods as a vegetable, and as fodder or green manure.
As a legume it fixes atmospheric nitrogen with Rhizobium bacteria, needing little nitrogen fertiliser and improving the soil for the next crop. It is short-duration and fairly drought-tolerant. Types range from bushy to spreading and semi-trailing. No specific cultivar is named here.
Climate & season
Cowpea needs warm weather (about 25–35 °C) and full sun; it tolerates heat and moderate drought but not frost.
- Grown in the kharif (rainy) and summer seasons in the plains.
- It is sensitive to frost and to cold, wet conditions.
- It stands moderate drought better than many pulses once established.
Soil & land preparation
Cowpea grows on a wide range of well-drained soils, best on sandy loam to loam at a pH of 6.0–7.5. It dislikes waterlogging and salinity.
- Prepare a well-drained, weed-free seedbed.
- Mix in well-rotted farmyard manure.
- Avoid waterlogged and saline-alkaline soils.
- Being a legume, it leaves the soil richer for the following crop.
Choosing a type & material
Select by purpose (grain, vegetable, dual-purpose or fodder) and by plant type (bushy, spreading or semi-trailing) and duration. Seed is sown directly. No specific cultivar is named here.
Planting material
- Use fresh, healthy, good-germination seed.
- Match the type to the purpose — bushy for grain, longer types for vegetable pods or fodder.
- Seed rate is about 20–25 kg/ha for grain, more when sown close for fodder.
- Reject shrivelled, damaged or old seed.
Preparation
- Treat seed with fungicide first, then inoculate with Rhizobium and PSB just before sowing.
- Keep inoculated seed out of direct sun and sow the same day.
- Sow at 3–5 cm depth into moist soil.
- Ensure good seed-to-soil contact for even emergence.
Planting & spacing
- Prepare a well-drained seedbed and mix in farmyard manure.
- Treat seed with fungicide, then coat with Rhizobium + PSB inoculant.
- Sow direct on flat or ridges — about 30 × 10 cm for grain, wider (45 × 15 cm) for spreading types, closer for fodder.
- Sow at 3–5 cm depth into moisture.
- Keep the field weed-free in the first 30–40 days.
- Provide light support for trailing types grown for vegetable pods.
Nutrient management
Figures below are a general guide per hectare — as a legume, cowpea needs only a small starter dose of nitrogen and more phosphorus. Adjust to soil test.
| Input | Dose (per ha) | Notes |
|---|---|---|
| Farmyard manure | 8–12 t | Mix in at land preparation Basal |
| Nitrogen (N) | 15–20 kg | Small starter dose only — the crop fixes the rest Basal |
| Phosphorus (P₂O₅) | 40–60 kg | Full dose basal — boosts nodulation and yield Basal |
| Potassium (K₂O) | as per test | Apply basal where soils are low Basal |
| Rhizobium + PSB | seed treatment | Inoculate seed before sowing Bio |
Water management
Cowpea is largely rainfed in the kharif season but responds to irrigation in summer.
- In the rains, grow mostly on rainfall with drainage in wet spells.
- In summer, irrigate at sowing and then at critical stages.
- Most critical stages are flowering and pod filling.
- Avoid waterlogging — it harms nodulation and roots.
Intercultural & crop management
- Keep the crop weed-free for the first 30–40 days with one or two weedings.
- Earth up lightly and mulch to conserve moisture.
- For vegetable use, pick tender pods regularly to keep the plant flowering.
- It intercrops well and can be ploughed in as green manure.
- Protect nodulation by avoiding excess nitrogen and waterlogging.
Plant protection
| Problem | Type | Watch for | Manage |
|---|---|---|---|
| Aphids & jassids | Pest | Colonies sucking sap on shoots and pods; honeydew; virus spread | Yellow sticky traps, neem, a recommended insecticide at threshold |
| Pod borer (Maruca / Helicoverpa) | Pest | Webbed flowers and bored pods with holes and frass | Pheromone traps, remove webbed buds, a recommended insecticide |
| Pod-sucking bugs | Pest | Bugs sucking developing pods; shrivelled, spotted seed | Field sanitation, a recommended insecticide at podding |
| Whitefly | Pest | Tiny white flies under leaves; sooty mould and virus spread | Yellow sticky traps, neem, a recommended insecticide |
| Anthracnose / leaf spot | Disease | Sunken dark spots on pods, stems and leaves in wet weather | Clean seed, rotation, recommended fungicide |
| Root rot / wilt | Disease | Yellowing and sudden drying in patches; rotted roots | Treated seed, drainage, rotation, avoid waterlogging |
| Powdery mildew | Disease | White powdery patches on leaves late in the season | Airflow, recommended fungicide or sulphur |
| Cowpea mosaic | Virus | Mottled, distorted leaves; stunting — spread by insects | Clean seed, control aphids and whitefly, rogue out plants |
IPM-first routine
- Start with treated, inoculated seed on a well-drained field.
- Keep the crop weed-free early and avoid waterlogging.
- Rogue out virus-affected and wilted plants promptly.
- Scout weekly; use pheromone and sticky traps at flowering.
- Favour natural enemies, neem and bio-agents first.
- Use recommended chemicals only at threshold, rotating modes of action.
Use crop-protection inputs safely
Always read the product label and follow it. Use the correct dose — more is not safer or better. Wear protective clothing (gloves, mask, full sleeves) while mixing and spraying, and respect the pre-harvest interval before you pick. Put IPM and cultural methods first and treat chemical sprays as a last resort.
Harvesting & yield
Harvest depends on the purpose — grain, vegetable pods or fodder.
- For grain, harvest when pods are dry and mature; dry, then thresh and clean the seed.
- For vegetable, pick tender green pods every 3–4 days before the seed swells.
- For fodder or green manure, cut or plough in at about 50% flowering.
- Dry grain well before storage to avoid bruchid (storage weevil) damage.
- Typical yield: about 1.0–1.5 t/ha of grain, with higher green-pod or fodder yields.