Magnesium Deficiency - Oilseed Rape

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4694-magnesium deficiency - oil seed rape-main image

Symptom description

Magnesium deficiency always shows initially on the older leaves. Chlorosis develops between the veins, while a narrow area on each side of the veins remains green. The leaf margins - and with proceeding deficiency also the intercostal areas - become necrotic.

Made worse by

Sandy soils. Acidic soils. Potassium rich soils. Soils receiving high potash applications. Cold wet periods.

Important for

Better crop establishment. Reduced plant losses over winter. Increases nutrient levels in the crop for better spring regrowth. Improved flowering. More even maturity. Boosts grain yield and oil content of seed.

Cause description

Magnesium deficiency Fe and Mn deficiency also show intercostal chlorosis and necrosis, but the symptoms start on younger leaves.

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Yara recommends

YaraVita MAGFLO 300

Oilseed Rape: For a single application, 2-4 l/ha at onset of stem extension. For moderate deficiency, 2-4 l/ha at 4-6 leaf stage and 2-4 l/ha at onset of stem extension. An extra application can be made 10-14 days later for severe deficiency. Avoid flowering. Water rate: 200 l/ha.

Other recommended products (3)

YaraVita MAGPHOS K

Oilseed Rape: For a single application, 5 l/ha at onset of stem extension. For moderate deficiency, 5 l/ha at 4 to 6 leaf stage and at onset of stem extension. An extra application can be made 10 to 14 days later for severe deficiency. Avoid flowering. Water rate: 200 l/ha

YaraVita CROPLIFT PRO

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

YaraVita BRASSITREL PRO

Oilseed Rape: 3 to 4 l/ha at the 4 to 9 leaf stage and again at the onset of the rapid stem extension phase up to the start of flowering. Repeat at 10 to 14 day intervals within these growth stages as necessary. Also, 3 l/ha at the end of petal fall. Water rate: 50 to 200 l/ha.