Copper deficiency-Potatoes | Yara South Africa

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Nutrients

Potatoes - Deformation

Symptoms
Copper deficiency causes permanent wilting of plants. Particularly young leaves roll in. Leaf tips and margins may drie off without preceding chlorosis.

Reasons
Copper deficiency on leaves Normally potatoes are not sensitive to copper deficiency. Symptoms are seldom visible in the field.

Potatoes - Deformation

Symptoms
Copper deficiency causes permanent wilting of plants. Particularly young leaves roll in.

Reasons
Copper deficiency on leaves Normally potatoes are not sensitive to copper deficiency. Symptoms are seldom visible in the field.

Copper deficiency made worse by

Organic soils
Chalky soils
Sandy soils
Reclaimed heathland
High nitrogen applications

Copper is important for

Healthy green foliage
Improved yield

Yara recommended fertilizers for Copper

YaraTera CHELATE 1089

Potatoes: Apply 2 kg/ha before planting (can be coated on pre-plant fertilizers) Apply a further 1 kg/ha at 3, 5, 7 weeks after planting. Can also be applied as a foliar application: Up to 150 g/100L water.

YaraTera CHELATE 1090

YaraVita COPTRAC 500

Potatoes: 0.5 l/ha applied 7 to 14 days after 100% emergence and following petiole analysis during tuber bulking. Water rate: 200 l/ha (30 l/ha for aerial application).

YaraVita MANCOZIN

Potatoes: 1 l/ha at one week after 100% emergence and during tuber bulking. For moderate to severe deficiency repeat applications at 10 to 14 day intervals. Water rate: 200 l/ha.

YaraVita TRI-PHOLATE

Potatoes: Apply 2 kg/ha 1 week after 100% emergence. Apply a further 2 kg/ha at tuber initiation and a final 2 kg/ha at flowering. Water rate: 200 l/ha for tractor driven sprayer. 100,000 l/ha for application through irrigation system.