Strawberries - Chlorosis
Symptoms
First the young, immature leaves show a uniform light-green colour. Later interveinal areas become very light green with veins remaining green. With severe deficiency interveinal areas and veins bleach exept for a broad green border at the leaf margin
Reasons
Copper deficiency
Copper deficient leaf blades contain less than 3ppm of copper at dry basis.
Early symptoms of sulphur, molybdenum, manganese or iron deficiency are similar to the early symptoms of copper deficiency.
Copper deficiency made worse by
- Organic soils
- Chalky soils
- Sandy soils
- Reclaimed heathland
- High nitrogen applications
Copper is important for
- Component of enzymes
- Important role in photosythesis and phenol metabolism of plants
- Regulation of destructive superoxide radicals inside cells
- Prevention of fungal diseases
