Manganese Deficiency in Wheat — Symptoms, Causes & Treatment

🔍 Symptoms

Interveinal chlorosis on young leaves — similar to iron but less severe. Grayish-green mottling. In soybean: "marsh spot" in seeds. In oats: "grey speck". Reduced enzyme activity.

🧩 Cause

Manganese becomes unavailable above pH 6.5. Deficiency in alkaline soils, waterlogged soils (Mn reduces to Mn2+ — excess then), overlimed soils, sandy soils.

🌿 Crop Info

Region: Punjab, Haryana, UP, MP, Rajasthan
Soil: Loamy, pH 6–8
Season: Rabi (Oct–Apr)

Correction Methods for Wheat

Product	Method	Rate	Best For
Manganese EDTA 13%	Foliar + Drip	1–2g/L foliar, 300g/acre drip	Quick correction, all soils
Manganese Sulphate 30.5%	Soil + Foliar	5g/L foliar, 5–8kg/acre soil	Acidic soils, soil application

Step-by-Step Treatment Plan

Confirm deficiency — Take leaf and soil samples. Send to lab or use visual diagnosis. Soil pH test critical (check at root zone depth).
Immediate foliar correction — Apply Manganese EDTA 13% at 1–2g/L foliar as emergency foliar spray. Spray in morning or evening. Repeat after 7–10 days.
Drip/soil correction — Apply via drip fertigation or soil for lasting correction. Single foliar application is temporary fix only.
Soil amendment — If soil pH is the cause: apply gypsum to reduce pH in alkaline soils, or lime if acidic. Target pH 6–7.
Prevent recurrence — Include micronutrient schedule in regular fertigation program. Soil test every season.

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