Iron deficiency-Tomato | Yara South Africa

Change crop

Nutrients

Tomato - Chlorosis

Symptoms
Plants deficient in Fe show chlorosis of intercostal areas of young leaves, followed by yellowing of whole shoot tips. At severe deficiency, the leaves may become nearly white, and the veins are chlorotic, too.

Reasons
Iron deficiency Magnesium deficiency also shows chlorosis in the interveinal areas, but these symptoms start on the older leaves, and the chlorosis has a more yellow-orange colour. Manganese deficiency also shows chlorosis on younger leaves, but the veins remain green even at severe deficiency.

Tomato - Chlorosis

Iron deficiency made worse by

High pH
Water logged soils
Calcareous soils
High copper, manganese or zinc soils

Iron is important for

Chlorophyll formation
Photosynthesis
Protein synthesis
Fruit colour

Yara recommended fertilizers for Iron

YaraTera CHELATE 1089

Tomato: Field Grown - 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

YaraTera MICROFLEX GA

Tomato: Apply 2 g of YaraTera Microflex GA per 100L of water in the stock solution.

YaraTera REXOLIN E13

YaraTera REXOLIN Q48

YaraVita TRI-PHOLATE

Tomato: Apply 2 - 4 kg/ha during the growing season through the irrigation water. Alternatively, apply 0.5 kg/ha as a foliar spray. Repeat at 10 to 14 day intervals as necessary, with a maximum of six applications per season. Water rate: 200 l/ha.