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Rabi Season130 Days Duration4 Key Sprays

Onion & Garlic Full-Season Spray & Fertigation Chart

प्याज व लहसुन | Allium cepa / Allium sativum

Scientifically formulated spray and nutrition schedule for Rabi and Kharif onion and garlic growers in Maharashtra (Nashik/Pune), MP, Gujarat, and Rajasthan. Targets Onion Thrips, Purple Blotch, Stemphylium Blight, and storage rotting.

Spray Window: Early morning (8:00 AM - 11:00 AM) using a high-grade silicone spreader
PHI Caution: Stop all sprays and withhold irrigation 15 days prior to bulb harvesting.

Agronomy Protocol

4 Milestones

From seed treatment to maturity

Soil Type:Friable
Water Rate:150–200 L/Acre
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Onion & Garlic

Rabi Season

Scientifically formulated spray and nutrition schedule for Rabi and Kharif onion and garlic growers in Maharashtra (Nashik/Pune), MP, Gujarat, and Rajasthan. Targets Onion Thrips, Purple Blotch, Stemphylium Blight, and storage rotting.

Total Sprays

4 Sprays

Duration

130 Days

1
20-25 DATTarget Date: 3 Dec 2026

Stage 1: Establishment & Damping Off Shield

150L Water (10 Tanks/Acre)

Young onion seedlings recover from transplanting shock. Target seedling damping off and early thrips entering inner leaf whorls.

Targets:Damping OffEarly Onion Thrips (Thrips tabaci)
Tank-Mix Recipe & Recommended Inputs:
Input & Technical MoleculePopular ExampleDose per AcrePer 15L KnapsackAgronomic Role
Mancozeb 75% WPFungicideDithane M-45500g in 150L water50gBroad spectrum contact barrier against soil fungal rots
Fipronil 5% SCInsecticideRegent300 ml in 150L water30 mlPenetrates inner leaf axils to kill hiding thrips nymphs
Humic Acid 98% FlakesBio-stimulantV-Hume250g in 150L water25gTriggers vigorous new white root initiation in transplanted seedlings
Mixing Warning: Mancozeb, Fipronil, and Humic Acid are 100% compatible. Always add a silicone sticking agent (0.5 ml/L).
Expert Tip: Onion leaves have a waxy cuticle. Agrochemical sprays bounce off unless mixed with a quality non-ionic silicone spreader.
2
45-50 DATTarget Date: 28 Dec 2026

Stage 2: Vegetative Canopy & Purple Blotch Defense

200L Water (13 Tanks/Acre)

Rapid leaf canopy growth. Humid warm weather causes purple-centered brown sunken spots (Purple Blotch) and silvery leaf rasping by thrips.

Targets:Purple Blotch (Alternaria porri)Stemphylium Leaf BlightOnion Thrips
Tank-Mix Recipe & Recommended Inputs:
Input & Technical MoleculePopular ExampleDose per AcrePer 15L KnapsackAgronomic Role
Tebuconazole 50% + Trifloxystrobin 25% WGFungicideNativo120g in 200L water10gDual systemic fungicide eradicates Purple Blotch and Stemphylium blight
Spinetoram 11.7% SCInsecticideDelegate180 ml in 200L water14 mlKnockdown of severe thrips infestations resistant to generic insecticides
NPK 19:19:19 100% Water SolubleWater Soluble NPK19:19:191 kg in 200L water75gMaintains active green leaf area necessary for bulb photosynthate accumulation
Mixing Warning: Nativo, Delegate, and 19:19:19 are fully compatible. Stir thoroughly.
Expert Tip: Each onion leaf corresponds to one bulb ring. Maintaining 8-10 healthy disease-free green leaves guarantees an "A-grade" jumbo bulb.
3
70-75 DATTarget Date: 22 Jan 2027

Stage 3: Bulb Initiation & Sizing (Neck Thinning)

200L Water (13 Tanks/Acre)

Leaves cease formation and bulb basal swelling begins. Prevent thick necks and maximize bulb diameter.

Targets:Late ThripsColletotrichum Twister DiseaseThick Neck
Tank-Mix Recipe & Recommended Inputs:
Input & Technical MoleculePopular ExampleDose per AcrePer 15L KnapsackAgronomic Role
NPK 0:52:34 (MKP)Water Soluble NPKMKP1.5 kg in 200L water110gHigh phosphate and potash direct nutrients to swelling bulb rings
Boron 20% SolubleMicronutrientBoron 20200g in 200L water15gPrevents internal heart rot, bulb splitting, and strengthens bulb skin
Mixing Warning: Completely stop all nitrogen fertilizers from 75 DAT onwards to prevent thick necks and storage rotting.
Expert Tip: Nitrogen applied after 75 DAT causes thick neck disorder (Gardan Moti), which prevents bulb sealing and causes rotting in storage.
4
95-100 DATTarget Date: 16 Feb 2027

Stage 4: Bulb Maturation, Skin Shine & Storability

200L Water (13 Tanks/Acre)

Final bulb enlargement. Strengthen outer scales, enhance red skin luster, and protect bulbs from post-harvest Aspergillus black mold.

Targets:Black Mold (Aspergillus niger)Bulb RotSkin 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 water110gSulphur + Potassium thickens dry outer scales, sealing the neck for 6-month storage life
Azoxystrobin 23% SCFungicideMirador / Amistar200 ml in 200L water15 mlEliminates latent fungal spores that cause storage rot in chawls
Mixing Warning: Stop irrigation immediately when 50% tops fall over naturally.
Expert Tip: Cure harvested onions in shade for 10-12 days before storage. Neck must be completely dry and paper-thin to prevent fungal entry.

Comprehensive Chemical & Fertilizer Guide (Onion & Garlic)

20-25 DAT

Stage 1: Establishment & Damping Off Shield

10 Tanks (150L)

Young onion seedlings recover from transplanting shock. Target seedling damping off and early thrips entering inner leaf whorls.

Mancozeb 75% WP(Dithane M-45)

Broad spectrum contact barrier against soil fungal rots

500g in 150L water50g / 15L
Fipronil 5% SC(Regent)

Penetrates inner leaf axils to kill hiding thrips nymphs

300 ml in 150L water30 ml / 15L
Humic Acid 98% Flakes(V-Hume)

Triggers vigorous new white root initiation in transplanted seedlings

250g in 150L water25g / 15L
Agronomy Tip: Onion leaves have a waxy cuticle. Agrochemical sprays bounce off unless mixed with a quality non-ionic silicone spreader.
45-50 DAT

Stage 2: Vegetative Canopy & Purple Blotch Defense

13 Tanks (200L)

Rapid leaf canopy growth. Humid warm weather causes purple-centered brown sunken spots (Purple Blotch) and silvery leaf rasping by thrips.

Tebuconazole 50% + Trifloxystrobin 25% WG(Nativo)

Dual systemic fungicide eradicates Purple Blotch and Stemphylium blight

120g in 200L water10g / 15L
Spinetoram 11.7% SC(Delegate)

Knockdown of severe thrips infestations resistant to generic insecticides

180 ml in 200L water14 ml / 15L
NPK 19:19:19 100% Water Soluble(19:19:19)

Maintains active green leaf area necessary for bulb photosynthate accumulation

1 kg in 200L water75g / 15L
Agronomy Tip: Each onion leaf corresponds to one bulb ring. Maintaining 8-10 healthy disease-free green leaves guarantees an "A-grade" jumbo bulb.
70-75 DAT

Stage 3: Bulb Initiation & Sizing (Neck Thinning)

13 Tanks (200L)

Leaves cease formation and bulb basal swelling begins. Prevent thick necks and maximize bulb diameter.

NPK 0:52:34 (MKP)(MKP)

High phosphate and potash direct nutrients to swelling bulb rings

1.5 kg in 200L water110g / 15L
Boron 20% Soluble(Boron 20)

Prevents internal heart rot, bulb splitting, and strengthens bulb skin

200g in 200L water15g / 15L
Agronomy Tip: Nitrogen applied after 75 DAT causes thick neck disorder (Gardan Moti), which prevents bulb sealing and causes rotting in storage.
95-100 DAT

Stage 4: Bulb Maturation, Skin Shine & Storability

13 Tanks (200L)

Final bulb enlargement. Strengthen outer scales, enhance red skin luster, and protect bulbs from post-harvest Aspergillus black mold.

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

Sulphur + Potassium thickens dry outer scales, sealing the neck for 6-month storage life

1.5 kg in 200L water110g / 15L
Azoxystrobin 23% SC(Mirador / Amistar)

Eliminates latent fungal spores that cause storage rot in chawls

200 ml in 200L water15 ml / 15L
Agronomy Tip: Cure harvested onions in shade for 10-12 days before storage. Neck must be completely dry and paper-thin to prevent fungal entry.

FAQ

Frequently Asked Questions: Onion & Garlic Spraying

Storage rot is caused by late nitrogen application, poor field curing, or latent black mold spores. Spraying SOP (0:0:50) at 95 DAT, curing bulbs in shade for 12 days, and cutting neck 2.5 cm above bulb prevents storage rot.

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