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Colocasia
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Colocasia

Colocasia esculenta
Family: Araceae
Typical yield 17.5 t/ha
Varieties 2
Pest/Disease 5
Seasons 2

Profile

Growth habit
perennial
Lifecycle (days)
180–300
Primary uses
Tuber/root; leaves as vegetable
Pollination
insect
Origin / distribution
Wet tropics/subtropics; humid lowlands & mid-altitudes

Environment

Climate

Temp optimal
21–28 °C
Rain optimal
1500–2500 mm/yr
Altitude
0–2000 m

Soil

pH optimal
5.8–6.5
Soil type
Deep fertile loam; moist/wet; avoid stagnation

Farmer Guide

Row spacing
100 cm
Plant spacing
75 cm
Depth
8 cm
Seed rate
1000 kg/ha
Nursery days
Planting: Use healthy corm setts/cormels. Raised beds or ridges. Keep soil moist and weed early; mulch.
Transplanting: Vegetative planting; handle setts gently to avoid rot.
Irrigation: Keep evenly moist; frequent light irrigation in dry spells.
Fertigation: Split N into small doses during vegetative growth under irrigation.
Pest scouting: Monitor for taro leaf blight and corm rots; remove infected leaves.
Pruning/Training: Remove old/diseased leaves; keep beds clean.
Harvest: Harvest at full corm size (6–10 months) when lower leaves senesce.
Postharvest: Cure in shade; handle gently; store cool/ventilated.

Nutrient Schedule

#StageDAPProductRateTargets (kg/ha)Notes
1 Basal 0 NPK 12-24-12 150 kg/ha N: —, P₂O₅: —, K₂O: — Band/broadcast and lightly incorporate
2 Topdress 60 CAN 26% N 120 kg/ha N: —, P₂O₅: —, K₂O: — Apply on moist soil
3 Micronutrients 70 Trace mix (Zn, B) 0 — N: —, P₂O₅: —, K₂O: — Foliar per label

Nutrient Requirements

NutrientStageAmountUnit
N Basal 40 kg/ha
P₂O₅ Basal 30 kg/ha
K₂O Basal 60 kg/ha
N Topdress 40 kg/ha

Images

Colocasia
Name Country Maturity Traits
Local Cocoyam KE 240 Large corms; good leaf production
Dasheen type UG 220 Leaves and corms edible; wetland tolerant
Stage Product Rate (kg/ha) Notes
Basal NPK 12-24-12 150
Topdress CAN 26% N 120 ~60 DAP on moist soil
Name Type Symptoms Management
Taro leaf blight disease Leaf lesions Sanitation; protectants
Taro leaf blight (Phytophthora colocasiae) disease Rapid foliar blight Sanitation; spacing; resistant lines; protectants
Corm/cormel rots (Pythium/Fusarium) disease Soft rot; plant collapse Healthy seed; drainage; rotation; avoid injury
Aphids pest Leaf curling; sooty mold Conserve natural enemies; soft insecticides if needed
Cutworms pest Cut seedlings at base Baits; sanitation; timely replanting
System Typical Min Max Notes
rainfed 15 8 25 Fresh corms
irrigated/wetland 20 12 35 Well-managed fields
Country Region Planting Harvest
KE Humid zones (long rains) Mar–Apr Sep–Dec
KE Humid zones (short rains) Oct–Nov May–Aug
Country Region Suitability
KE Arid/semi-arid uplands Low
KE Humid lowlands & mid-altitudes High
KE Humid zones High
TZ Coastal & wet valley bottoms High
UG Lake Victoria basin High