Zinc deficiency-Cotton | Yara Australia

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Nutrients

Cotton - Chlorosis

Symptoms
Young and medium leaves with interveinal chlorosis, starting from the leaf margin. First signs of marginal necrosis occur.

Reasons
Zinc deficiency Zinc, Iron and Manganese deficiency cause similar leaf symptoms. Soil and plant testing is recommended to distinguish among them.

Zinc deficiency made worse by

Organic soils
High pH soils
Soils rich in phosphorus
Soils receiving high phosphorus application
Cold wet conditions

Zinc is important for

Better seedling growth and establishment
Earlier boll set, maturity / cut out
Increased yield
Improved fibre quality

Yara recommended fertilizers for Zinc

YaraVita GLYTREL ZnP

Cotton: 2-3 l/ha from 4 nodes to early squaring. For moderate to severe deficiency, repeat applications at 10 to 14 day intervals. Water rate: 30 to 200 l/ha.

YaraVita ZINTRAC

Cotton: 0.3-1 l/ha applied 2-4 leaf stage, repeat at 10 - 14 day intervals. Water Rate: 50-200 l/ha.