Zinc deficiency-Tomato | Yara South Africa

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Nutrients

Tomato - Deformation

Symptoms
Affected leaves are dark green with chlorotic brightenings along the main vein, in the middle of the leaf blade. The tissue looks strong and leathery, being slightly cupped downward.

Reasons
Zinc deficiency High phosphorus levels or anaerobic conditions can induce deficiencies. A lack of Zinc occurs only rarely in greenhouse crops.

Tomato - Deformation

Symptoms
Affected leaves are dark green with chlorotic brightenings along the main vein, in the middle of the leaf blade. The tissue looks strong and leathery, being slightly cupped downward.

Reasons
Zinc deficiency High phosphorus levels or anaerobic conditions can induce deficiencies. A lack of Zinc occurs only rarely in greenhouse crops.

Tomato - Deformation

Symptoms
Affected leaves are dark green with chlorotic brightenings along the main vein, in the middle of the leaf blade. The leaf tissue looks strong and leathery, being slightly cupped downward. Shortened internodes give the plant a dense, compressed and stiff habitus.

Reasons
Zinc deficiency High phosphorus levels or anaerobic conditions can induce deficiencies. A lack of Zinc occurs only rarely in greenhouse crops.

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

Correct functioning of many enzyme systems
Synthesis of nucleic acid
Auxin metabolism
Important for internode elongation and leaf development

Yara recommended fertilizers for Zinc

YaraRega AQUAFLEX 13

Tomato (field grown): Exact recommendation depends on soil analysis, yield potential, fertigation practices and nutrient management plan. Refer to your local Yara Agronomist for detailed recommendation.

YaraRega AQUAFLEX 18

Tomato: Exact recommendation depends on soil analysis, yield potential, fertigation practices and nutrient management plan. Refer to your local Yara Agronomist for detailed recommendation.

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 Zn15

YaraVita CALTRAC BZ

Tomato (field grown): One to four applications of 5 l/ha from flowering on second truss onwards up to one month before harvest. Allow 7 days between applications. Water rate: 50 to 500 l/ha.

YaraVita CROP BOOST

Tomato (field grown): 3 to 5 l/ha at the 4 to 6 leaf stage. Repeat at 10 to 14 day intervals as necessary. Maximum 3 applications. Water rate: 200 l/ha.

YaraVita ZINTRAC 700

Tomato (field grown): 0.3 to 1 l/ha when plants are at 4 to 6 leaf stage. Repeat at 10 to 14 day intervals if necessary. Water rate: 70 to 500 l/ha.