Manganese deficiency-Tomato | Yara New Zealand

Change crop

Nutrients

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.

Reasons
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

Yara recommended fertilizers for Manganese

YaraVita MANTRAC PRO

Tomato (field grown): 0.5-1 l/ha at the 4 to 6 leaf stage and repeated at 10 to 14 day intervals if required by moderate to severe deficiency. Water rate: 30-500 l/ha.