Lechuga y ensalada - Necrosis
Síntomas
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.
Causas
Zinc deficiency on leaves compared to optimum supply
Lechuga y ensalada - Growth retardation
Síntomas
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.
Causas
Zinc deficiency
Lechuga y ensalada - Growth retardation
Síntomas
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.
Causas
Zinc deficiency
Lechuga y ensalada - Growth retardation
Síntomas
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.
Causas
Zinc deficiency on leaves and roots
Lechuga y ensalada - Chlorosis
Síntomas
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.
Causas
Commencing zinc deficiency on leaves
Zinc deficiency vs. optimum empeorado por
- Organic soils
- High pH soils
- Soils rich in phosphorus
- Soils receiving high phosphorus application
- Cold wet conditions
Zinc tiene importancia para
- Enzyme activation, but also for synthesis of growth regulators
