Zinc deficiency-Tomato | Yara United States

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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

YaraVita® MANCOZIN™

Tomato (field grown): 1 to 2 pints/acre at the 4 to 6 leaf stage. Repeat when required at 10 to 14 day intervals. Water rate: 3 to 150 gallons/acre.

YaraVita® ZINTRAC™

Tomatoes (field grown): 1 pint/acre when plants are at 4 to 6 leaf stage. Water rate: 3 to 50 gallons/acre. For use in Wisconsin: YaraVita Zintrac can be applied to this crop in Wisconsin requiring a medium to high level of zinc.

NUTRA-PHOS CALZINC

Tomato (field grown): 3 to 10 lb. per acre per application. One to three applications are advised at 3 to 4 week intervals, starting at period prior to bloom. Repeat as needed. Apply aerial applications in at least 5 gallons/acre and ground applications in at least 10 gallons/acre; however, when total application gallonage is 25 gallons per acre or less, DO NOT mix more than 1 lb. of this product per gallon of water.