Africa's most important cash crop — outgrower discipline, scouting and economic thresholds, three-round quality picking, lint protection from field to gin, and navigating scheme credit without the debt spiral.
Cotton is Africa's most important non-food cash crop: grown across the Sahel and savanna, it is the primary cash income for millions of smallholder families — school fees, medical bills, farm inputs — delivered through one of the continent's most organised buyer networks. It is also the most pest-demanding crop in this college, and the difference between a 700 kg/ha farmer and a 2 t/ha farmer is almost entirely scouting discipline and threshold-based spray decisions. This course teaches cotton as a systems crop: outgrower or scheme discipline first (read the rules before planting), seed and stand establishment, fertiliser split for boll-not-straw, then the pest management centrepiece — economic thresholds, W-pattern weekly scouting, and knowing the difference between a spray that saves bolls and one that kills natural enemies. Cotton disease and weed management follow: three weedings, boll rot prevention on ridges, virus resistance through early planting, and stalk destruction as mandatory community pest hygiene. Picking discipline — only open dry white bolls, multiple rounds, first picking kept separate, no wet storage — is where all the agronomic work is either captured or lost. The business module covers gin price, quality premiums, scheme credit and the debt-spiral discipline, and the growth path to seed-grower niche or group aggregation for better prices.
Cotton is Africa's most important non-food cash crop: grown across the Sahel, savanna and east African drylands, it is the primary cash income for millions of smallholder families who depend on its ginned lint price to pay school fees, medical bills and farm inputs. Organised buyer networks — ginners, outgrower schemes and government purchasing agencies — exist almost everywhere cotton grows, giving it one of the continent's most reliable (if price-volatile) market structures. The crop is also labour-intensive at picking, making it a community crop where family and hired hands work together at peak.
| Requirement | Standard | Notes |
|---|---|---|
| Rainfall | 500–1,200 mm/season, well-distributed through growing season | Drought at flowering or boll fill = yield collapse; too much rain at harvest = quality loss |
| Temperature | Day 25–35 °C; night above 15 °C | Cold nights below 15 °C slow growth; frost kills |
| Soils | Deep well-drained loams; tolerates clay where drainage good | Waterlogging is fatal; compacted topsoil limits boll-filling roots |
| Season length | Frost-free 5–7 months minimum | Late planting = late harvest = boll rot in rains; early planting = more pests |
Most African cotton is grown under outgrower or contract farming schemes: the ginner or an intermediary supplies seed, inputs (sometimes on credit) and a guaranteed purchase price; the farmer delivers seed cotton at collection points. This model provides market certainty but also discipline — variety, planting date and pesticide use are often prescribed. Know your scheme's rules before planting; non-compliance often means loss of input credit and price guarantee.
Answer every question. Aim for at least 7/10 before marking this month complete. Each answer comes with an explanation — read them even when you are right.
Cotton seed is large (relatively) and delicate: use only certified, delinted, fungicide-treated seed from your scheme or agro-dealer — untreated seed germinates poorly and carries soil-borne diseases. Planting rules:
| Input | Role | Notes |
|---|---|---|
| P (phosphorus) at planting | Root establishment and early boll formation | Place SSP or compound in the furrow at planting; P is immobile, so placement near roots matters |
| N (nitrogen) | Vegetative growth and boll fill; too early = rank growth, shade and insects; too late = boll abscission | Split: half at 3–4 weeks (thinning time), half at flower bud appearance (~8–10 weeks) |
| Manure/compost | Organic matter; moderates heavy/light soils | Work in before planting; don't apply late (pushes rank vegetative growth) |
| K and micronutrients | Boll set and fibre quality on depleted soils | Where schemes recommend it; K especially on light sandy soils |
Cotton emerges in 5–10 days in warm moist soil. Thin to one plant per station at 2–3 weeks — crowded plants produce vegetative competition and small bolls. Gap-fill within 2 weeks using a transplant or overseed from the same batch. Thinned seedlings can be transplanted on a rainy day (cotton takes transplant reasonably well at seedling stage). Scout for cutworms at emergence — circular cut seedlings at ground level are the signature; evening hand collection works on small plots.
Answer every question. Aim for at least 7/10 before marking this month complete. Each answer comes with an explanation — read them even when you are right.
Cotton attracts more pest species than any other crop in this curriculum. Scouting is not optional — it is the heart of cotton farming. The critical mental model: economic thresholds exist for every pest; chemical treatment is justified only when pest numbers cross the threshold. Below-threshold treatment wastes money, kills natural enemies, and breeds resistance. Above-threshold treatment saves bolls and income. The difference between a 700 kg and a 2 t farmer is often entirely scouting discipline.
| Pest | Damage & timing | Threshold / Response |
|---|---|---|
| American bollworm (Helicoverpa) | Larva bores into bolls; most damaging late in season; boll entry holes with frass | 1–2 larvae per 10 plants (varies by scheme); spray when threshold met, Bt-based or approved product |
| Pink bollworm | Internal boll feeding; characteristic rosette flower or crossed lint inside boll | Destroy crop residues (overwinters in stalks); pheromone traps for detection; spray if threshold |
| Spiny bollworm | Bores into squares (buds) and bolls; early-season damage | Threshold-based spray; resistant/tolerant varieties where released |
| Cotton aphids | Honeydew on foliage and lint (staining); vector of viruses | Natural enemies usually control; treat only heavy infestations; insecticide resistance common |
| Whitefly | Honeydew + sooty mould staining lint; virus vector | Monitor; treat heavy infestations; virus spread prevented only by early planting and resistant varieties |
| Jassids (leafhopper) | Leaf cupping and drying; dense hair (pubescence) on leaf varieties resist them | Variety resistance is primary; threshold-based spray if varieties susceptible |
| Thrips | Silver-scarred leaves at seedling stage; usually minor | Healthy stands outgrow; treat only severe early attacks |
Weekly scouting from thinning to boll opening: walk a W-pattern through the field, inspect 10–20 plants per stop, count larvae, adults, eggs, boll entry holes, and estimate percent damage. Record on a simple sheet. Your scheme's threshold table tells you when to spray. No spray before the threshold; no delay after it. Scouting is the cheapest pest control in the budget.
Answer every question. Aim for at least 7/10 before marking this month complete. Each answer comes with an explanation — read them even when you are right.
Cotton's long season and slow early growth make it highly weed-sensitive in the first 6 weeks. Two or three weedings, starting at thinning (2–3 weeks), are the standard programme:
Cotton is a heavy feeder: a 1 t/ha yield removes ~40–60 kg N, 20–30 kg P₂O₅, 60–100 kg K₂O from the soil. Where the crop is grown continuously on the same field, potassium depletion and organic matter loss happen quietly and compound. Return cotton stalks (chopped) to the field after harvest to partially replace K and organic matter; add manure on alternate seasons; and rotate with legumes (cowpea, groundnut) to rebuild N and break pest cycles.
Answer every question. Aim for at least 7/10 before marking this month complete. Each answer comes with an explanation — read them even when you are right.
Cotton lint quality is determined in the field, not the gin. Three quality enemies:
Pick only fully open, dry, white-fluffy bolls. Never pick:
Multiple picking rounds: first picking at 50–60% boll opening, second and third at 2–3 week intervals. Never mix first and later pickings (later pickings are more weathered and lower quality); sell separately where the scheme permits. Pick into clean cotton bags or baskets — never off the ground, never into vegetable sacks or fertiliser bags (chemical staining).
Destroy cotton stalks promptly after final picking — chop, pull and either return (partial K/organic matter) or burn (pink bollworm prevention where schemes require). Late-standing stalks are the overwintering hotel for pink bollworm and other pests, seeding next season's problem. Many schemes prescribe a mandatory destruction date with penalties for non-compliance — know your scheme rule.
Answer every question. Aim for at least 7/10 before marking this month complete. Each answer comes with an explanation — read them even when you are right.
The gin price (seed cotton price) is set by the ginner, scheme or government price board. In many countries, it is announced before planting season — use it to assess the budget's viability before committing labour and inputs. Quality premiums (for clean, unstained, full-boll cotton) exist in some schemes and are worth knowing. Where no premium is paid for quality, it still pays you in volume: clean cotton picks faster, stores better and wastes less at delivery.
| Item | Assumption | Amount |
|---|---|---|
| Yield | Managed plot: 3 weedings, weekly scouting, threshold spraying, 3 pickings | ~1.5 t seed cotton |
| Gross | $0.50–0.75/kg (gin price varies by country) | ~$750–1,125 |
| Seed (certified, treated, ~10 kg) | $15–40 | |
| Fertiliser (P basal + split N) | SSP/compound at planting + urea ×2 | $80–180 |
| Pesticides (scouted, threshold-based ~3–5 applications) | $60–150 | |
| Weeding labour ×3 | $90–180 | |
| Picking labour ×3 | Often family or hired; the biggest single labour cost | $120–300 |
| Bags, storage, transport to collection point | $40–100 | |
| Contingency (10%) | $50–100 | |
| Indicative margin | If scheme credit repaid, net income arrives post-sale | ~$300–500/ha — reliable cash income where managed well |
Most African cotton schemes supply inputs on credit deducted at delivery. This is convenient but creates a risk: crop failure or poor yield means debt carried into next season. Avoid the spiral: grow only what you can manage well; don't over-commit on area when family labour is uncertain; insist on records of input credit received and deducted (your receipt is your audit); and keep 10–20% of your cotton separate as the emergency float for next season's cash needs.
Per plot per season: variety and scheme; planting date; stand count at thinning; weeding dates; scout records (week, pest, count, threshold decision, spray or not); fertiliser applications with dates; picking round dates and weights per round; delivery date and gin price received; credit deducted; net income. Report card: total yield (kg/ha), scouting rate (weeks scouted/weeks growing), and net income after debt. Growth path: year one — one hectare managed to scheme standard with scouting discipline; year two — potentially expand area OR invest in own hand-pump or irrigation for a food crop alongside cotton; year three — seed grower for the scheme (clean high-yield seed at premium) or group aggregation for a better gin price.
Answer every question. Aim for at least 7/10 before marking this month complete. Each answer comes with an explanation — read them even when you are right.
The final project is your complete cotton enterprise plan — scheme choice, the season from seed to gin delivery, and the credit-management discipline.
Submission standard: A plan you could hand to a savings group, a bank officer, or a family investor without embarrassment. Real local prices, real named buyers, honest risks.
Cotton's budget is dominated by picking labour (three rounds) and pesticides (if unmanaged) — scouting-discipline reduces the latter dramatically. Scheme input credit is shown as a budget item but is deducted at delivery, so gross income is reduced before cash arrives. Keep records of every deduction.
| Item | Details | Typical cost (USD) |
|---|---|---|
| Certified treated seed (~10 kg) | Scheme-prescribed variety | $15–40 |
| P fertiliser (SSP/compound at planting) | Placed in furrow | $40–90 |
| N fertiliser ×2 (urea at thinning + flower bud) | Split application | $40–90 |
| Pesticides (scouted, ~3–5 threshold applications) | Approved products only | $60–150 |
| Land prep (ridging + furrow making) | $50–100 | |
| Weeding labour ×3 | 2–3 weeks, 6–8 weeks, 10–12 weeks | $90–180 |
| Picking labour ×3 rounds | Biggest single cash cost | $120–300 |
| Bags, storage, drying tarpaulins | $30–80 | |
| Transport to collection point | $30–80 | |
| Contingency (10%) | $50–100 | |
| Total indicative costs | Before scheme credit repayment | $525–1,210 |
| Net margin | Revenue 1.5 t × $0.50–0.75/kg minus costs | ~$300–500/ha — solid cash income |
Prices vary widely by country. Before spending anything, price every line in your own town and rebuild this table — that exercise is part of your final project.
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