Tomato - Chlorosis
Symptoms
Manganese deficient plants show chlorotic zones in the intercostal areas of the younger leaves, whereas the veins and a small seam around them remain green. With ongoing deficiency, gradually growing necrotic spots appear in the chlorotic interveinal tissue.
In some cases, symptoms may also appear on older leaves first.
Causes
Manganese deficiency on the leaf.
Similar symptoms can be found with iron deficiency, but the chlorosis is more severe then, and the veins do not remain green at severe deficiency.
Manganese deficiency made worse by
- Organic soils
- Sandy soils
- High pH
- Cold wet periods
- Fluffy soils
Manganese is important for
- Nitrate reduction
- Photosynthesis
- Protein synthesis
