Phosphorus Deficiency - Maize

Symptom description

Leaf blades are dark green, while margins and veins show a dull, purple tint which may spread over the whole leaf blade. Older leaves are affected first. The reddish discoloration is usually visible in the juvenile stage only.

Made worst by

Acidic or very alkaline (calcareaus) soils. Low organic matter. Cold or wet conditions. Crops with a poorly developed root system. Soils with low P reserves. Soils with a high phosphate capacity. Iron rich soils.

Important for

Better crop establishment. Good plant development early in the season. More even maturity reducing grain losses at harvest. Improves yield. Brings forward harvest date.

Cause description

Phosphorus deficiency Some maize hybrids show reddish leaves in younger development stages although P supply is sufficient.

Yara recommends

YaraVita MAIZE BOOST

Maize: 5 l/ha at 4 to 6 leaf stage. Water rate: 200 l/ha.

Other recommended products (3)

YaraTera KRISTA MAP

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YaraVita MAGPHOS K

Maize: 5 l/ha at 4 to 8 leaf stage. Repeat at 10 to 14 day intervals if necessary. Water rate: 200 l/ha

YaraVita CROPLIFT PRO

Maize: 2.5 to 5 kg/ha. Repeat at 10 to 14 day intervals as necessary. Avoid applications during flowering. Water rate: 200 l/ha.