Maize - Discolouration
Symptoms
Severely affected leaf (left) shows red and purple tints with interveinal streaky lesions. Whilst mildly affected leaf (centre and right) shows interveinal chlorosis and streaky lesions only.
Reasons
Magnesium deficiency.
Iron and manganese deficiencies show similar symptoms but begin at younger leaves.
Maize - Discolouration
Symptoms
First symptom is interveinal chlorosis at the older leaves. With progressing deficiency the yellow stripes show red and purple tints.
Reasons
Magnesium deficiency.
Iron and manganese deficiencies show similar symptoms but begin at younger leaves.
Maize - Chlorosis
Symptoms
First symptom is interveinal chlorosis at the older leaves. With progressing deficiency the yellow/white stripes show red and purple tints and streaky lesions.
Reasons
Magnesium deficiency.
Iron and manganese deficiencies show similar symptoms but begin at younger leaves.
Maize - Chlorosis
Symptoms
First symptom is interveinal chlorosis at the older leaves. White necrotic spots later develop within these chlorotic zones which coalesce to necrotic stripes between the veins. With progressing deficiency the tips and edges may die off. Growth of plant is normal, unless deficiency is severe.
Reasons
Magnesium deficiency.
Iron and manganese deficiencies show similar symptoms but begin at younger leaves.
Maize - Chlorosis
Symptoms
First symptom is interveinal chlorosis at the older leaves. Yellow to white stripes or typical beaded lesions occur; tissue along the main vein stays green for the longest time.
Reasons
Magnesium deficiency.
Iron and manganese deficiencies show similar symptoms but begin at younger leaves.
Maize - Chlorosis
Symptoms
First symptom is interveinal chlorosis at the older leaves. Yellow to white stripes or typical beaded lesions occur; tissue along the main vein stays green for the longest time.
Reasons
Magnesium deficiency.
Iron and manganese deficiencies show similar symptoms but begin at younger leaves.
Maize - Discolouration
Symptoms
First symptom is interveinal chlorosis at the older leaves. With progressing deficiency the yellow stripes show red and purple tints.
Reasons
Magnesium deficiency.
Iron and manganese deficiencies show similar symptoms but begin at younger leaves.
Maize - Discolouration
Symptoms
First symptom is interveinal chlorosis at the older leaves. With progressing deficiency the yellow stripes show red and purple tints.
Reasons
Magnesium deficiency.
Iron and manganese deficiencies show similar symptoms but begin at younger leaves.
Magnesium deficiency made worse by
- Sandy soils
- Acidic soils
- Potassium rich soils
- Soils receiving high potash applications
- Cold wet periods
Magnesium is important for
- Good plant development early in the season
- Improves yield
- Brings forward harvest date
