Lettuce - Wilting
Symptoms
Plants seem to be wilted and flabby. Along leaf tips and margins chlorotic mottling arises, which proceeds from old to younger leaves. Grey-brown necrotic areas develop in the chlorotic zones. Starting on the tips, leaves turn yellow and fade.
Sometimes veins show light red or pink discoloration.
Furthermore copper deficiency leads to inhibited growth and small, light heads.
Causes
Copper deficiency on lettuce
Lettuce - Chlorosis
Symptoms
Along leaf tips and margins chlorotic mottling arises, which proceeds from old to younger leaves. Grey-brown necrotic areas develop in the chlorotic zones. Starting on the tips, leaves turn yellow and fade.
Causes
Copper deficiency on leaves
Lettuce - Growth retardation
Symptoms
Along leaf tips and margins chlorotic mottling arises, which proceeds from old to younger leaves. Grey-brown necrotic areas develop in the chlorotic zones. Starting on the tips, leaves turn yellow and fade.
In addition copper deficiency leads to inhibited growth and small, light heads. With severe deficiency no heads are formed.
Causes
Copper deficiency on leaves
Lettuce - Growth retardation
Symptoms
Copper deficiency leads to inhibited growth and small, light heads. With severe deficiency no heads are formed.
In addition along leaf tips and margins chlorotic mottling arises, which proceeds from old to younger leaves. Grey-brown necrotic areas develop in the chlorotic zones. Starting on the tips, leaves turn yellow and fade.
Causes
Copper deficiency (on the right) compared to optimum supply (on the left)
Lettuce - Wilting
Symptoms
Copper deficiency leads to inhibited growth and small, light heads. With severe deficiency no heads are formed.
In addition along leaf tips and margins chlorotic mottling arises, which proceeds from older to younger leaves. Grey-brown necrotic areas develop in the chlorotic zones. Starting on the tips, leaves turn yellow and fade.
Development of root is slightly restricted. Secondary roots are long, thin and white.
Causes
Copper deficiency on roots and leaves
Copper deficiency made worse by
- Organic soils
- Chalky soils
- Sandy soils
- Reclaimed heathland
- High nitrogen applications
Copper is important for
- Production of enzymes
- Important role in photosynthesis and phenol metabolism of plants
- Regulation of destructive superoxide radicals inside cells
- Prevention of fungal diseases
Yara recommended fertilisers for Copper deficiency
YaraVita COPTREL 500
Lettuce (Field Grown): 0.5 l/ha at 10 to 14 days after transplanting or emergence. Water rate: 200 l/ha.
Read more about YaraVita COPTREL 500