Copper deficiency-Wheat | Yara South Africa

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Nutrients

Cereals - Deformation

Symptoms
Ears of Cu deficient plants are often trapped in the sheath and emerge with white tips and blind spikelets. Plants show dry, white and twisted or curled leaf tips (white tip). Young leaves wilt on their tips, whereas the basal leaves remain dark green.

Reasons
Copper deficiency Severe drought, heavy frosts and herbicide damage can cause blind ears, too.

Cereals - Wilting

Symptoms
Young leaves show dry, white and twisted or curled leaf tips (white tip). The basal leaves remain dark green. The complete plant growth is stunted.

Reasons
Copper deficiency

Cereals - Wilting

Symptoms
Young leaves show dry, white and twisted or curled leaf tips (white tip). The basal leaves remain dark green. The complete plant growth is stunted.

Reasons
Copper deficiency

Cereals - Deformation

Symptoms
Ears of Cu deficient plants are often trapped in the sheath and emerge with white tips and blind spikelets. Less severe symptoms may be seen as curved ears which do not ripen with an accumulation of the dark coloured melanin.

Reasons
Copper deficiency

Cereals - Deformation

Symptoms
Ears are often trapped in the sheath and emerge with white tips and blind spikelets. Plants show dry, white and twisted or curled leaf tips (white tip).

Reasons
Copper deficiency

Cereals - Size reduced

Symptoms
Ears of Cu deficient plants show blind grain sites (blind spikelets) or poor grain formation. As the ears are lightweight they stand more upright than sufficiently supplied ones and give the plant a different habitus.

Reasons
Copper deficiency

Copper deficiency made worse by

Organic soils
Chalky soils
Sandy soils
Reclaimed heathland
High nitrogen applications

Copper is important for

Increased fertility (number of grains per ear)
Better grain quality

Yara recommended fertilizers for Copper

YaraTera REXOLIN Cu15

YaraVita COPTRAC 500

Cereals: 0.25 to 0.5 l/ha at tillering to second node detectable (Craven 2 - 15). Water rate: 50 to 200 l/ha. For moderate to severe deficiency, repeat applications at 10 to 14 day intervals. For aerial application apply 0.25 l/ha at the timings described above. Water rate: 20 to 50 l/ha. Seed Dressing: Typically 3 litres per tonne. Also, up to 6 litres per tonne if necessary.

YaraVita MANCOZIN

Cereals: 0.5 to 1 l/ha from 2 leaf stage to first node detectable (Craven 1 - 10/11). Water rate: 200 l/ha. For severe deficiency, increase to 2 l/ha or repeat the above dose 10 to 14 days later.

YaraVita TRI-PHOLATE

Cereals: 3 kg/ha from 4 leaf stage to 1st node detectable (Craven 4 - 10/11). Repeat within this timing at an interval of not less than 10 days, if necessary. Water rate: Tractor driven sprayer: 200 l/ha Application through irrigation system: 100,000 l/ha.

YaraVita WHEAT PHOLATE

Cereals: 3 kg/ha at the 4 to 6 leaf stage. Water rate: Tractor driven sprayer: 200 l/ha Application through irrigation system: 100,000 l/ha.