Yellow Leaves in Cotton

Common Causes

• Nitrogen deficiency — general yellowing
• Magnesium deficiency — interveinal on older leaves
• Iron deficiency — younger leaves yellow
• Verticillium wilt — yellowing + wilting

Treatment

Nitrogen: Urea 20kg/acre. Magnesium: MgSO4 5g/L foliar × 3. Iron: Iron DTPA 0.5g/L foliar.

Prevention

Balanced NPK, avoid excess K which reduces Mg uptake, ensure drainage.

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