Complete Farming Guide
Wheat Farming Guide
Triticum aestivum
800 million tonnes produced globally each year
Wheat is the world's most widely cultivated cereal crop, feeding over 2.5 billion people across every continent. From flatbreads in South Asia to pasta in Europe, wheat forms the backbone of global food security. It thrives in temperate climates with cool winters and warm, dry summers, and is grown on more land area than any other commercial food crop.
Quick Facts
Growing Season
Winter (Rabi)
Growth Period
100-120 days
Optimal Temp
15-25°C (59-77°F)
Water Needs
450-650mm
Top Producer
China
Yield / Acre
1.1-1.6 tonnes (varies by region)
Wheat Growth Stages — What to Do at Every Stage
Germination & Emergence
Days 0-14What to do
Sow seeds at 1-2 inch depth in well-prepared seedbed. Apply pre-emergence herbicide if weed pressure is expected. Ensure soil moisture is adequate for uniform germination.
Watch for
Poor emergence from crusted soil or planting too deep. Check for seed rot in waterlogged areas.
Tillering
Days 15-45What to do
Apply first nitrogen split (40-50 lb N/acre). This is when the plant produces side shoots — more tillers mean more potential heads. Scout for early aphid infestations.
Watch for
Yellow patches indicating nitrogen deficiency. Stunted plants may signal root disease. Count tillers per plant — aim for 3-5.
Stem Extension (Jointing)
Days 46-70What to do
Apply second nitrogen split (30-40 lb N/acre). This is the most critical period for water. Avoid any foot traffic or machinery that could damage elongating stems.
Watch for
Stripe rust pustules on leaves — act immediately with fungicide. Lodging risk increases if nitrogen was over-applied early.
Heading & Flowering
Days 71-90What to do
Apply fungicide to protect the flag leaf and head from Fusarium head blight if wet conditions persist. Ensure irrigation is consistent — even brief drought stress now reduces grain count.
Watch for
Bleached or shriveled heads indicate Fusarium. Orange-brown pustules mean leaf rust. This is the most disease-vulnerable period.
Grain Fill & Maturity
Days 91-120What to do
Stop irrigation 2-3 weeks before harvest to allow grain to dry down naturally. Scout for aphids on heads — they secrete honeydew that reduces grain quality.
Watch for
Shriveled grains from heat stress (above 35°C). Test grain moisture — harvest at 12-14% moisture. Delayed harvest risks shattering losses.
Common Wheat Diseases — Identification Guide
Stripe Rust (Yellow Rust)
Puccinia striiformis
What you will see
Yellow-orange powdery pustules arranged in stripes along the leaf veins. Leaves look like they have been painted with yellow lines. Severely infected leaves dry out from the tip.
Conditions that favor it
Cool temperatures (10-15°C), high humidity, and dew. Spreads rapidly in overcast weather with light winds.
Septoria Leaf Blotch
Zymoseptoria tritici
What you will see
Tan-brown irregular lesions with dark specks (pycnidia) visible inside. Starts on lower leaves and moves upward. Lesions often have a yellow halo.
Conditions that favor it
Wet, cool weather (15-20°C) with rain splash spreading spores from lower to upper leaves. Worst in humid continental climates.
Fusarium Head Blight (Scab)
Fusarium graminearum
What you will see
Premature bleaching of one or more spikelets on the head. Infected kernels appear shriveled, chalky white or pink. Salmon-pink fungal growth may be visible at spikelet base.
Conditions that favor it
Warm, wet weather (25-30°C) during flowering. Corn stubble in the previous rotation is the primary inoculum source. Produces mycotoxins (DON) that render grain unsafe.
Powdery Mildew
Blumeria graminis f. sp. tritici
What you will see
White-gray powdery fungal growth on upper leaf surfaces and stems. Looks like flour has been dusted on the plant. Leaves underneath the mildew turn yellow and die.
Conditions that favor it
Dense canopy with poor air circulation, moderate temperatures (15-22°C), and high humidity. More common in high-nitrogen, lush crops.
Leaf Rust (Brown Rust)
Puccinia triticina
What you will see
Small, circular, orange-brown pustules scattered randomly across the upper leaf surface. Unlike stripe rust, pustules are not in lines. Rubbing a finger across the leaf picks up rusty-orange spores.
Conditions that favor it
Warmer conditions than stripe rust (15-22°C), high humidity, prolonged leaf wetness. Can spread very rapidly in warm, humid springs.
Common Wheat Pests — Identification & Damage
Aphids (Grain Aphid, Bird Cherry-Oat Aphid)
Damage
Suck sap from leaves, stems, and developing heads, causing yellowing and stunted growth. Heavy infestations produce honeydew that supports sooty mold. Most importantly, aphids transmit Barley Yellow Dwarf Virus (BYDV).
How to identify
Small (2-3mm), soft-bodied, green to dark brown insects clustered on stems and undersides of leaves. Check by pulling back leaf sheaths. Threshold: 5+ aphids per tiller during grain fill.
Armyworm (True Armyworm)
Damage
Larvae eat leaf tissue from the edges inward, leaving only the midrib in severe cases. They feed at night and hide at the soil surface during the day. Can strip a field in 2-3 days when populations are high.
How to identify
Green-brown caterpillars with a prominent stripe along each side, up to 4cm long. Look for irregular chewing damage on leaf margins. Scout at dusk when larvae become active. Threshold: 4-5 larvae per square foot.
Hessian Fly
Damage
Larvae feed at the base of leaves, weakening stems and causing them to lodge (fall over). Infested tillers are stunted, dark green, and the stems break easily at the feeding site. Yield losses of 10-30% are common.
How to identify
Small, dark flies (3mm) lay orange-red eggs on upper leaf surfaces. Larvae are tiny, legless maggots found between the leaf sheath and stem (pull back sheath to check). Plant after the "fly-free date" for your region.
Wheat Stem Sawfly
Damage
Larvae bore inside the stem, weakening it and causing lodging before harvest. The stem is hollowed out and snaps in wind. Losses are often 10-15% from lodging alone, plus reduced grain fill.
How to identify
Adult is a slender, wasp-like insect (10mm). Look for small entry holes near the second node. Cut stems open to find pale, legless larvae inside. Solid-stemmed varieties provide resistance.
Wheat Midge
Damage
Larvae feed on developing kernels, causing them to shrivel and crack. Infested kernels show a characteristic "damage groove." Midge damage reduces both yield and grain quality (lower test weight and protein).
How to identify
Tiny orange flies (2-3mm) that emerge at dusk during heading. Females lay eggs on developing heads. Scout at sunset — look for orange flies resting on heads. Threshold: 1 midge per 4 heads.
Wheat Nutrient Management — NPK Guide
Nitrogen (N)
80-120 lb N/acre total, split 2-3 applications
Phosphorus (P)
30-50 lb P2O5/acre based on soil test
Potassium (K)
20-40 lb K2O/acre based on soil test
Application Timing
First N split at tillering (40-50 lb), second at jointing (30-40 lb), optional third at flag leaf (20-30 lb). P and K applied at planting or pre-plant.
Wheat Irrigation Schedule
Total Water Requirement
18-21 inches (450-530mm) total crop water use
Critical Stages
Crown root initiation (tillering), booting, and grain fill are the three most water-sensitive stages. Drought during grain fill causes the most yield loss.
Irrigation Frequency
Every 10-15 days in arid regions, adjusting for rainfall. Stop irrigation 2-3 weeks before harvest to allow natural dry-down.
Wheat Economics — Cost, Yield & Profit
Cost per Acre
$350-416/acre (US average)
Yield per Acre
45-55 bushels/acre (US average)
Revenue per Acre
$400-550/acre at $7-10/bushel
Profit per Acre
$50-134/acre
Regional Context
Wheat margins are tight. Profitability depends heavily on input cost management and achieving above-average yields. Irrigated wheat in the US Southern Plains averages higher costs ($500+/acre) but also higher yields (65+ bu/acre). In South Asia and Africa, production costs are lower ($100-200/acre) but yields are also lower (1.1-1.3 t/acre).
Frequently Asked Questions — Wheat Farming
What is the best time to plant wheat?
The best planting time depends on your wheat type and location. Winter wheat should be planted 2-3 weeks before the first expected fall frost — typically mid-September to mid-October in the US Northern Plains, October to November in the Southern Plains, and November to December in South Asia. Spring wheat is planted as soon as the soil can be worked in spring, usually March to April. Planting too early risks Hessian fly damage and disease pressure; planting too late reduces tillering and winter hardiness. Check your local extension office for the recommended "fly-free date" and planting window for your specific region.
How much water does wheat need per acre?
Wheat requires 18-21 inches (450-530mm) of total water over its growing season. This comes from a combination of stored soil moisture, rainfall, and irrigation. The three most critical water-demand periods are: (1) crown root initiation during tillering, (2) booting when the head is forming inside the stem, and (3) grain fill when kernels are plumping. A single drought stress event during grain fill can reduce yields by 20-30%. In irrigated systems, plan for 4-6 irrigation events of 2-3 inches each. Monitor soil moisture at 12-inch depth — irrigate when available water drops below 50%.
How do I identify wheat rust early?
Wheat rust diseases are among the most destructive wheat diseases worldwide. Stripe rust (yellow rust) appears first as small yellow flecks that elongate into characteristic yellow-orange stripes running parallel to leaf veins — it looks like someone drew lines with a yellow-orange marker. Leaf rust (brown rust) shows up as small, circular orange-brown pustules scattered randomly across the leaf surface — rub your finger across and it comes away orange. Stem rust shows large, dark reddish-brown pustules on stems and leaf sheaths. The key to early detection is scouting lower leaves weekly starting at tillering, since rust often establishes on lower leaves before moving up. Satellite-based NDVI monitoring through Cropple.AI can detect the spectral changes from rust infection 10-14 days before symptoms are visible to the naked eye.
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