Sla - Necrosis
Symptomen
Symptoms of zinc deficiency on lettuce start on older or medium leaves. They develop papery, grey-green necrosic spots with brown borders on leaf margins. Necrotic areas increase quickly and flow together.
Leaf parts which are not subjected to light remain green.
Growth is restricted.
Zinc deficiency in an early stage of development causes rosetting, no heads are formed.
Redenen
Zinc deficiency on leaves compared to optimum supply
Sla - Growth retardation
Symptomen
Symptoms of zinc deficiency on lettuce start on leaf margins of older or medium leaves. They develop papery, grey-green necrotic spots with brown borders, mostly without preceding chlorosis. Necrotic areas increase quickly and flow together.
Leaf parts which are not subjected to light, remain green.
Growth is restricted.
Zinc deficiency in an early stage of development causes rosetting, no heads are formed.
Redenen
Zinc deficiency
Sla - Growth retardation
Symptomen
Symptoms of zinc deficiency on lettuce start on leaf margins of older or medium leaves. They develop papery, grey-green necrotic spots with brown borders, mostly without preceding chlorosis. Necrotic areas increase quickly and flow together.
Leaf parts which are not subjected to light, remain green.
Growth is restricted.
Zinc deficiency in an early stage of development causes rosetting, no heads are formed.
Redenen
Zinc deficiency
Sla - Growth retardation
Symptomen
Symptoms of zinc deficiency on lettuce start on leaf margins of older or medium leaves. They develop papery, grey-green necrotic spots with brown borders, mostly without preceding chlorosis. Necrotic areas increase quickly and flow together.
Leaf parts which are not subjected to light, remain green.
Growth is restricted. Zinc deficiency in an early stage of development causes rosetting, no heads are formed.
Growth of roots is slightly restricted.
Redenen
Zinc deficiency on leaves and roots
Sla - Chlorosis
Symptomen
Symptoms of zinc deficiency on lettuce start near leaf margins of older or medium leaves. They develop papery, grey-green necrotic spots with brown borders, mostly without preceding chlorosis. Necrotic areas increase quickly and flow together.
Leaf parts which are not subjected to light, remain green.
Redenen
Commencing zinc deficiency on leaves
Zinc deficiency vs. optimum wordt erger door
- Organic soils
- High pH soils
- Soils rich in phosphorus
- Soils receiving high phosphorus application
- Cold wet conditions
Zink is belangrijk voor
- Enzyme activation, but also for synthesis of growth regulators
