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Rabi Season105 Days Duration4 Key Sprays

Potato Full-Season Spray & Fertigation Chart

आलू | Solanum tuberosum

High-yield potato spray and nutrition schedule for UP (Agra/Aligarh), West Bengal, Punjab, and Bihar. Robust defense against Late Blight (Phytophthora infestans), Early Blight, Aphid virus vectors, and maximum tuber bulking.

Spray Window: Morning hours after frost has melted (9:00 AM - 12:00 PM)
PHI Caution: Dehaulm (cut foliage) 10-12 days before tuber digging to harden skins.

Agronomy Protocol

4 Milestones

From seed treatment to maturity

Soil Type:Deep,
Water Rate:150–200 L/Acre
Dynamic Agronomy Calendar

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Potato

Rabi Season

High-yield potato spray and nutrition schedule for UP (Agra/Aligarh), West Bengal, Punjab, and Bihar. Robust defense against Late Blight (Phytophthora infestans), Early Blight, Aphid virus vectors, and maximum tuber bulking.

Total Sprays

4 Sprays

Duration

105 Days

1
0 DASTarget Date: 13 Nov 2026

Stage 1: Seed Tuber Treatment

50L Water (3 Tanks/Acre)

Treating cut or whole seed tubers against Black Scurf (Rhizoctonia) and dry rot before cold storage removal / planting.

Targets:Black Scurf (Rhizoctonia solani)Common ScabDry Rot (Fusarium)
Tank-Mix Recipe & Recommended Inputs:
Input & Technical MoleculePopular ExampleDose per AcrePer 15L KnapsackAgronomic Role
Pencycuron 250 SCFungicideMonceren2.5 ml per litre water for tuber dip35 mlSpecialist contact protectant against Black Scurf sclerotia on potato skin
Mixing Warning: Dip tubers for 10 minutes, dry in shade for 24 hours before planting.
Expert Tip: Take seed tubers out of cold storage 7-10 days before planting to allow sprouts to emerge (chitting). Plant when sprouts are 1 cm long.
2
30-35 DAS (After Earthing-Up)Target Date: 13 Dec 2026

Stage 2: Vegetative & Early Blight / Aphid Vector Control

150L Water (10 Tanks/Acre)

Fast vegetative canopy development. Green peach aphids transmit Leaf Roll virus; target early blight target spots.

Targets:Early Blight (Alternaria solani)Green Peach Aphid (Myzus persicae)
Tank-Mix Recipe & Recommended Inputs:
Input & Technical MoleculePopular ExampleDose per AcrePer 15L KnapsackAgronomic Role
Mancozeb 75% WPFungicideDithane M-45600g in 150L water60gMulti-site contact shield against early blight
Thiamethoxam 25% WGInsecticideActara50g in 150L water5gEliminates aphids before they transmit viral degenerations
NPK 19:19:19 100% Water SolubleWater Soluble NPK19:19:191 kg in 150L water100gMaintains lush leaf canopy prior to stolon tuberization
Mixing Warning: Mancozeb, Actara, and 19:19:19 are 100% compatible.
Expert Tip: Ensure tubers are buried at least 7 cm deep during earthing-up. Exposed tubers turn green (toxic solanine) and get infected by tuber moth.
3
50-55 DASTarget Date: 2 Jan 2027

Stage 3: Tuber Bulking & Late Blight Prophylaxis

200L Water (13 Tanks/Acre)

Rapid tuber expansion stage. Cool cloudy weather with night dew triggers explosive Late Blight that can rot the crop in 3 days.

Targets:Late Blight (Phytophthora infestans)Hollow Heart (Boron Deficit)
Tank-Mix Recipe & Recommended Inputs:
Input & Technical MoleculePopular ExampleDose per AcrePer 15L KnapsackAgronomic Role
Cymoxanil 8% + Mancozeb 64% WPFungicideCurzate600g in 200L water45gTranslaminar + contact combination stops late blight even after infection
NPK 0:52:34 (MKP) + Boron 20%Water Soluble NPK0:52:34 + Boron1 kg MKP + 200g Boron in 200L water75g MKP + 15g BoronDirects carbohydrates to tubers and prevents Hollow Heart disease
Mixing Warning: Curzate, MKP, and Boron are fully tank-mixable.
Expert Tip: Never wait for late blight symptoms to appear. If forecast predicts 2 days of continuous cloudiness with morning fog, spray Curzate immediately.
4
70-75 DASTarget Date: 22 Jan 2027

Stage 4: Tuber Sizing, Skin Hardening & Shelf-Life

200L Water (13 Tanks/Acre)

Final tuber bulking. Enhance tuber diameter, increase specific gravity / dry matter, and harden skins before dehaulming.

Targets:Late Blight Tuber RotTuber CrackingSkin Peeling
Tank-Mix Recipe & Recommended Inputs:
Input & Technical MoleculePopular ExampleDose per AcrePer 15L KnapsackAgronomic Role
NPK 0:0:50 (SOP - Sulphate of Potash)Water Soluble NPKSOP 0:0:501.5 kg in 200L water110gChloride-free potassium increases starch content and makes skins tough for transport
Mixing Warning: Stop all nitrogen completely. Withhold water 10 days before dehaulming.
Expert Tip: Cut potato foliage (dehaulm) 10 days before digging. This hardens tuber skin, preventing bruising and rotting in cold storage.

Comprehensive Chemical & Fertilizer Guide (Potato)

0 DAS

Stage 1: Seed Tuber Treatment

3 Tanks (50L)

Treating cut or whole seed tubers against Black Scurf (Rhizoctonia) and dry rot before cold storage removal / planting.

Pencycuron 250 SC(Monceren)

Specialist contact protectant against Black Scurf sclerotia on potato skin

2.5 ml per litre water for tuber dip35 ml / 15L
Agronomy Tip: Take seed tubers out of cold storage 7-10 days before planting to allow sprouts to emerge (chitting). Plant when sprouts are 1 cm long.
30-35 DAS (After Earthing-Up)

Stage 2: Vegetative & Early Blight / Aphid Vector Control

10 Tanks (150L)

Fast vegetative canopy development. Green peach aphids transmit Leaf Roll virus; target early blight target spots.

Mancozeb 75% WP(Dithane M-45)

Multi-site contact shield against early blight

600g in 150L water60g / 15L
Thiamethoxam 25% WG(Actara)

Eliminates aphids before they transmit viral degenerations

50g in 150L water5g / 15L
NPK 19:19:19 100% Water Soluble(19:19:19)

Maintains lush leaf canopy prior to stolon tuberization

1 kg in 150L water100g / 15L
Agronomy Tip: Ensure tubers are buried at least 7 cm deep during earthing-up. Exposed tubers turn green (toxic solanine) and get infected by tuber moth.
50-55 DAS

Stage 3: Tuber Bulking & Late Blight Prophylaxis

13 Tanks (200L)

Rapid tuber expansion stage. Cool cloudy weather with night dew triggers explosive Late Blight that can rot the crop in 3 days.

Cymoxanil 8% + Mancozeb 64% WP(Curzate)

Translaminar + contact combination stops late blight even after infection

600g in 200L water45g / 15L
NPK 0:52:34 (MKP) + Boron 20%(0:52:34 + Boron)

Directs carbohydrates to tubers and prevents Hollow Heart disease

1 kg MKP + 200g Boron in 200L water75g MKP + 15g Boron / 15L
Agronomy Tip: Never wait for late blight symptoms to appear. If forecast predicts 2 days of continuous cloudiness with morning fog, spray Curzate immediately.
70-75 DAS

Stage 4: Tuber Sizing, Skin Hardening & Shelf-Life

13 Tanks (200L)

Final tuber bulking. Enhance tuber diameter, increase specific gravity / dry matter, and harden skins before dehaulming.

NPK 0:0:50 (SOP - Sulphate of Potash)(SOP 0:0:50)

Chloride-free potassium increases starch content and makes skins tough for transport

1.5 kg in 200L water110g / 15L
Agronomy Tip: Cut potato foliage (dehaulm) 10 days before digging. This hardens tuber skin, preventing bruising and rotting in cold storage.

FAQ

Frequently Asked Questions: Potato Spraying

For preventative protection, spray Mancozeb 75% WP. If late blight water-soaked spots are already visible, immediately spray Dimethomorph 50% WP (Acrobat @ 300g/acre) or Cymoxanil + Mancozeb (Curzate @ 600g/acre).

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