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Kharif Season160 Days Duration6 Key Sprays

Bt Cotton Full-Season Spray & Fertigation Chart

कपास (बीटी कॉटन) | Gossypium hirsutum

Complete 160-day scientific spray and nutrition schedule for Bt Cotton in Maharashtra, Gujarat, Telangana, and MP. Covers early sucking pests (thrips, jassids, aphids), square drop, pink bollworm management, and leaf reddening (Lalya) prevention.

Spray Window: Early morning (7:00 AM - 10:30 AM) or late afternoon (4:30 PM - 6:30 PM)
PHI Caution: Maintain 21 days PHI before 1st boll picking. Do not spray synthetic pyrethroids before 90 DAS.

Agronomy Protocol

6 Milestones

From seed treatment to maturity

Soil Type:Deep
Water Rate:150–200 L/Acre
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Bt Cotton

Kharif Season

Complete 160-day scientific spray and nutrition schedule for Bt Cotton in Maharashtra, Gujarat, Telangana, and MP. Covers early sucking pests (thrips, jassids, aphids), square drop, pink bollworm management, and leaf reddening (Lalya) prevention.

Total Sprays

6 Sprays

Duration

160 Days

1
0 DASTarget Date: 13 Nov 2026

Stage 1: Seed Treatment & Sowing

Protection against seed-borne fungal rots, collar rot, and early sucking pests during seedling emergence.

Targets:Seedling Collar RotEarly AphidsThripsRoot Rot
Tank-Mix Recipe & Recommended Inputs:
Input & Technical MoleculePopular ExampleDose per AcrePer 15L KnapsackAgronomic Role
Carboxin 37.5% + Thiram 37.5% DSFungicideVitavax Power2.5g per kg seedN/A (Seed Coating)Eradicates seed-borne fungal spores
Imidacloprid 70% WSInsecticideGaucho5g per kg seedN/A (Seed Coating)Provides 25-day systemic shield against sucking pests
Mixing Warning: Do not mix chemical seed dressers with bio-fertilizers (Rhizobium) simultaneously; treat chemical first, dry in shade, then apply bio-inoculant.
Expert Tip: Dry treated seeds in shade for 2 hours before sowing. Sowing in moist soil ensures 95%+ germination within 5 days.
2
20-25 DASTarget Date: 3 Dec 2026

Stage 2: Early Vegetative & Sucking Pest Shield

150L Water (10 Tanks/Acre)

Crucial stage when young cotton seedlings are attacked by thrips and jassids causing leaf curling and stunted root growth.

Targets:Jassids (Amrasca biguttula)ThripsLeaf Curl
Tank-Mix Recipe & Recommended Inputs:
Input & Technical MoleculePopular ExampleDose per AcrePer 15L KnapsackAgronomic Role
Acetamiprid 20% SPInsecticidePride / Manik50-60g in 150L water6-8gSystemic translaminar control of sucking pests
NPK 19:19:19 100% Water SolubleWater Soluble NPKYaraMila / Mahadhan 19:19:191 kg in 150L water100gBoosts early root expansion and lush vegetative growth
Humic Acid 98% FlakesBio-stimulantV-Hume / Humesol250g in 150L water25gStimulates secondary white root growth
Mixing Warning: Acetamiprid, 19:19:19, and Humic Acid are 100% compatible. Dissolve 19:19:19 first, then add Humic, then insecticide.
Expert Tip: Use a hollow-cone nozzle. Spray on the underside of leaves where thrips and jassid nymphs feed.
3
45-50 DASTarget Date: 28 Dec 2026

Stage 3: Branching & Square Formation (Pre-Bloom)

150L Water (10 Tanks/Acre)

Rapid formation of fruiting branches (sympodia) and squares (flower buds). Target whiteflies, aphids, and early square drop.

Targets:Whitefly (Bemisia tabaci)AphidsSquare SheddingBacterial Blight
Tank-Mix Recipe & Recommended Inputs:
Input & Technical MoleculePopular ExampleDose per AcrePer 15L KnapsackAgronomic Role
Diafenthiuron 50% WPInsecticidePegasus250g in 150L water25gBroad-spectrum translaminar control of whitefly nymphs and mites
NPK 0:52:34 (MKP)Water Soluble NPKYaraTera Krista MKP1 kg in 150L water100gHigh phosphate induces massive square and flower bud formation
Boron 20% SolubleMicronutrientBorax Morarji / Agribor200g in 150L water20gStrengthens square pedicels and prevents square drop
Mixing Warning: Do not mix with alkaline copper sprays or sulfur. Boron dose must not exceed 20g per 15L tank to avoid leaf tip burn.
Expert Tip: Install yellow sticky traps (10 per acre) across the field to monitor and trap adult whiteflies.
4
70-75 DASTarget Date: 22 Jan 2027

Stage 4: Peak Flowering & Early Boll Formation

200L Water (13 Tanks/Acre)

The most critical window of cotton cultivation. First pink bollworm moth flight arrives; target boll retention and fungal leaf spots.

Targets:Pink Bollworm (Pectinophora gossypiella)Spotted BollwormAlternaria Leaf Spot
Tank-Mix Recipe & Recommended Inputs:
Input & Technical MoleculePopular ExampleDose per AcrePer 15L KnapsackAgronomic Role
Chlorantraniliprole 18.5% SCInsecticideCoragen60 ml in 200L water5 mlRynaxypyr ovicide and larvicide stops early boll borer larvae
Tebuconazole 25.9% ECFungicideFolicur250 ml in 200L water20 mlProtects tender bolls from Alternaria and Cercospora fungal spots
NPK 13:0:45 (Potassium Nitrate)Water Soluble NPKMulti-K1.5 kg in 200L water110gSupplies soluble potash to drive carbohydrate transport into developing bolls
Mixing Warning: Coragen, Folicur, and 13:0:45 are mutually compatible. Ensure 200L clean water per acre for thorough canopy coverage.
Expert Tip: Install 5 Pheromone Traps per acre with Gossyplure lures. If trap catch exceeds 8 moths/day for 3 consecutive days, spray immediately.
5
95-100 DASTarget Date: 16 Feb 2027

Stage 5: Active Boll Development & Lalya Prevention

200L Water (13 Tanks/Acre)

Heavy boll load causes rapid nutrient drain. Target pink bollworm rosette flowers and prevent Magnesium/Nitrogen deficiency reddening (Lalya).

Targets:Pink BollwormLeaf Reddening (Lalya / Magnesium Deficiency)Grey Mildew
Tank-Mix Recipe & Recommended Inputs:
Input & Technical MoleculePopular ExampleDose per AcrePer 15L KnapsackAgronomic Role
Emamectin Benzoate 5% SGInsecticideProclaim80g in 200L water6-8gParalyzes Lepidopteran caterpillar nervous system within 2 hours
Magnesium Sulphate (Epsom Salt)MicronutrientMahadhan MagSul1 kg in 200L water80gRestores chlorophyll center, curing red leaf disease completely
Neem Coated Urea (Spray Grade)Water Soluble NPKIFFCO Urea1 kg in 200L water80gFoliar nitrogen revives leaf vitality during heavy boll load
Mixing Warning: Dissolve Urea and Magnesium Sulphate thoroughly in separate bucket before pouring into tank. Do not spray during hot midday sun.
Expert Tip: Pluck and destroy all "rosetted flowers" manually. They harbor 1st instar pink bollworm larvae.
6
120-125 DASTarget Date: 13 Mar 2027

Stage 6: Boll Bursting & Maturity

200L Water (13 Tanks/Acre)

Final stage ensuring clean white lint, uniform boll opening, and zero staining from late sucking pests or sooty mold.

Targets:Late Pink BollwormSooty MoldInternal Boll Rot
Tank-Mix Recipe & Recommended Inputs:
Input & Technical MoleculePopular ExampleDose per AcrePer 15L KnapsackAgronomic Role
Flonicamid 50% WGInsecticideUlala60g in 200L water5gStops feeding of late aphids and mealybugs, preventing honey-dew lint staining
Azoxystrobin 18.2% + Difenoconazole 11.4% SCFungicideAmistar Top200 ml in 200L water15 mlEnsures green leaf retention and protects open bolls from rot
Mixing Warning: Strictly observe 15-day pre-harvest interval before first manual picking.
Expert Tip: Pick cotton after dew has completely evaporated (after 10:00 AM) to maintain moisture below 8% for maximum mandi grade price.

Comprehensive Chemical & Fertilizer Guide (Bt Cotton)

0 DAS

Stage 1: Seed Treatment & Sowing

Protection against seed-borne fungal rots, collar rot, and early sucking pests during seedling emergence.

Carboxin 37.5% + Thiram 37.5% DS(Vitavax Power)

Eradicates seed-borne fungal spores

2.5g per kg seedN/A (Seed Coating) / 15L
Imidacloprid 70% WS(Gaucho)

Provides 25-day systemic shield against sucking pests

5g per kg seedN/A (Seed Coating) / 15L
Agronomy Tip: Dry treated seeds in shade for 2 hours before sowing. Sowing in moist soil ensures 95%+ germination within 5 days.
20-25 DAS

Stage 2: Early Vegetative & Sucking Pest Shield

10 Tanks (150L)

Crucial stage when young cotton seedlings are attacked by thrips and jassids causing leaf curling and stunted root growth.

Acetamiprid 20% SP(Pride / Manik)

Systemic translaminar control of sucking pests

50-60g in 150L water6-8g / 15L
NPK 19:19:19 100% Water Soluble(YaraMila / Mahadhan 19:19:19)

Boosts early root expansion and lush vegetative growth

1 kg in 150L water100g / 15L
Humic Acid 98% Flakes(V-Hume / Humesol)

Stimulates secondary white root growth

250g in 150L water25g / 15L
Agronomy Tip: Use a hollow-cone nozzle. Spray on the underside of leaves where thrips and jassid nymphs feed.
45-50 DAS

Stage 3: Branching & Square Formation (Pre-Bloom)

10 Tanks (150L)

Rapid formation of fruiting branches (sympodia) and squares (flower buds). Target whiteflies, aphids, and early square drop.

Diafenthiuron 50% WP(Pegasus)

Broad-spectrum translaminar control of whitefly nymphs and mites

250g in 150L water25g / 15L
NPK 0:52:34 (MKP)(YaraTera Krista MKP)

High phosphate induces massive square and flower bud formation

1 kg in 150L water100g / 15L
Boron 20% Soluble(Borax Morarji / Agribor)

Strengthens square pedicels and prevents square drop

200g in 150L water20g / 15L
Agronomy Tip: Install yellow sticky traps (10 per acre) across the field to monitor and trap adult whiteflies.
70-75 DAS

Stage 4: Peak Flowering & Early Boll Formation

13 Tanks (200L)

The most critical window of cotton cultivation. First pink bollworm moth flight arrives; target boll retention and fungal leaf spots.

Chlorantraniliprole 18.5% SC(Coragen)

Rynaxypyr ovicide and larvicide stops early boll borer larvae

60 ml in 200L water5 ml / 15L
Tebuconazole 25.9% EC(Folicur)

Protects tender bolls from Alternaria and Cercospora fungal spots

250 ml in 200L water20 ml / 15L
NPK 13:0:45 (Potassium Nitrate)(Multi-K)

Supplies soluble potash to drive carbohydrate transport into developing bolls

1.5 kg in 200L water110g / 15L
Agronomy Tip: Install 5 Pheromone Traps per acre with Gossyplure lures. If trap catch exceeds 8 moths/day for 3 consecutive days, spray immediately.
95-100 DAS

Stage 5: Active Boll Development & Lalya Prevention

13 Tanks (200L)

Heavy boll load causes rapid nutrient drain. Target pink bollworm rosette flowers and prevent Magnesium/Nitrogen deficiency reddening (Lalya).

Emamectin Benzoate 5% SG(Proclaim)

Paralyzes Lepidopteran caterpillar nervous system within 2 hours

80g in 200L water6-8g / 15L
Magnesium Sulphate (Epsom Salt)(Mahadhan MagSul)

Restores chlorophyll center, curing red leaf disease completely

1 kg in 200L water80g / 15L
Neem Coated Urea (Spray Grade)(IFFCO Urea)

Foliar nitrogen revives leaf vitality during heavy boll load

1 kg in 200L water80g / 15L
Agronomy Tip: Pluck and destroy all "rosetted flowers" manually. They harbor 1st instar pink bollworm larvae.
120-125 DAS

Stage 6: Boll Bursting & Maturity

13 Tanks (200L)

Final stage ensuring clean white lint, uniform boll opening, and zero staining from late sucking pests or sooty mold.

Flonicamid 50% WG(Ulala)

Stops feeding of late aphids and mealybugs, preventing honey-dew lint staining

60g in 200L water5g / 15L
Azoxystrobin 18.2% + Difenoconazole 11.4% SC(Amistar Top)

Ensures green leaf retention and protects open bolls from rot

200 ml in 200L water15 ml / 15L
Agronomy Tip: Pick cotton after dew has completely evaporated (after 10:00 AM) to maintain moisture below 8% for maximum mandi grade price.

FAQ

Frequently Asked Questions: Bt Cotton Spraying

Leaf reddening in Bt Cotton is caused by Magnesium and Nitrogen deficiency when developing bolls draw nutrients from leaves. Spray Magnesium Sulphate (1 kg) + Urea (1 kg) in 200L water per acre at 75, 90, and 105 DAS to keep foliage lush green.

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