Iron deficiency-Wine Grape

Symptoms
Symptoms always start on youngest leaves with yellow green, later pale yellow interveinal chlorosis. Main veins remain green. The blades show the most severe fading at their margins. Severe deficiency produces symptoms on older leaves and entire shoots, too. Usually the first leaves formed in the spring do not suffer; only later growth is chlorotic.

Reasons
Iron deficiency An actual lack of Fe is rare because most soils contain enough Fe to meet the requirements of grapevines. However, the low availability of Fe creates deficiencies (lime-induced chlorosis).

Symptoms
Symptoms always start on youngest leaves with yellow green, later pale yellow interveinal chlorosis. Main veins still remain green. Severe deficiency produces symptoms on older leaves too.

Reasons
Iron deficiency An actual lack of Fe is rare because most soils contain enough Fe to meet the requirements of grapevines. However, the low availability of Fe creates deficiencies (lime-induced chlorosis).

Symptoms
Symptoms always start on youngest leaves with yellow green, later pale yellow interveinal chlorosis. Main veins still remain green. The most severe fading can be seen on the leaf margins. Severe deficiency produces symptoms on older leaves too. Entire shoots may turn yellow or yellowish/green.

Reasons
Iron deficiency An actual lack of Fe is rare because most soils contain enough Fe to meet the requirements of grapevines. However, the low availability of Fe creates deficiencies (lime-induced chlorosis).

Symptoms
Symptoms always start on youngest leaves with yellow green, later pale yellow interveinal chlorosis. Main veins remain green for some time. Severe deficiency produces symptoms on older leaves too. The picture shows that the discoloration doesn't always proceed uniformly.

Reasons
Iron deficiency An actual lack of Fe is rare because most soils contain enough Fe to meet the requirements of grapevines. However, the low availability of Fe creates deficiencies (lime-induced chlorosis).