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.
Causes
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.
Causes
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.
Causes
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
