Pomme de terre - Chlorosis
Symptômes
Younger leaves show interveinal chlorosis and necrosis which occurs in irregular patches. Whitish spots develop within the brown necrotic tissue.
Symptoms may also start on older leaves.
Raisons
Zinc deficiency
Pomme de terre - Deformation
Symptômes
Younger leaves show interveinal chlorosis and tipburn. Whitish spots can develop within the brown necrotic tissue.
The leaf blades are small, narrow and cupped upward. Shoots can be stunted.
Raisons
Zinc deficiency
Pomme de terre - Deformation
Symptômes
With zinc deficiency, leaves are smaller and growth is stunted.
The leaves are deformed and fold inwards ('fern leaf of potato' ).
Greyish brown to bronze coloured blotches appear first on the middle of the leaves, later all over the foliage.
Raisons
Zinc deficiency on leaves
Pomme de terre - Deformation
Symptômes
Younger leaves show interveinal chlorosis. Whitish spots can develop within the affected tissue.
The leaf blades are small, narrow and cupped upward.
Raisons
Zinc deficiency
In potatoes, zinc deficiency symptoms are variable. Generally the leaves are smaller and the plants are stunted in growth.
Pomme de terre - Deformation
Symptômes
With Zinc deficiency, leaves are smaller and growth is stunted.
The leaves are deformed and folded inwards ('fern leaf of potato' ).
Mature leaves are affected most: greyish brown to bronze coloured blotches appear first on the middle of the leaves, later all over the foliage. Leaf blades show interveinal chlorosis.
Raisons
Zinc deficiency on leaves
Zinc deficiency aggravé par
- Organic soils
- High pH soils
- Soils rich in phosphorus
- Soils receiving high phosphorus application
- Cold wet conditions
Zinc est important pour
- Healthy green foliage
- Improved tuber yield and quality
Yara a recommandé cet engrais pour Zinc
YaraVita ZINTRAC 700
Potatoes: 1 l/ha one week after 100% emergence. For moderate to severe deficiency, repeat applications may be necessary at 10 to 14 day intervals. Also, 1 l/ha following petiole analysis, during tuber bulking. Water rate: 200 l/ha.
En savoir plus YaraVita ZINTRAC 700
