Céréales - Spots
Symptômes
In the present case, a mature leaf exhibits irregular light brown lesions, bordered by a dark brown margin.
Raisons
Zinc deficiency
Céréales - Growth retardation
Symptômes
Affected plants are paler in colour than normal and the leaves have a purplish tint. Necrotic spots (often light brown with dark margin) occur on the older leaves.
Growth is also reduced due the affect of zinc on chlorophyll function. Internodes are shortened.
Raisons
Zinc deficiency
Céréales - Chlorosis
Symptômes
Medium leaves show interveinal chlorosis.
Raisons
Zinc deficiency on durum wheat
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
- Increased fertility (number of grains per ear)
- Better grain quality
Yara a recommandé cet engrais pour Zinc
YaraVita GRAMITREL
Cereals: 1 to 3 l/ha from the 2 leaf stage to second node detectable (Zadok's G.S. 12 to 32). Repeat applications at 10 to 14 day intervals, within this timing, if necessary. For autumn sown crops, an application prior to winter dormancy may also be beneficial. In addition, 1 l/ha from second node detectable to flag leaf fully emerged (Zadoks G.S. 32 to 39). Water rate: 50 to 200 l/ha. Seed Dressing: 3 to 6 litres per tonne.
En savoir plus YaraVita GRAMITRELYaraVita MANCOZIN
Cereals: 1 l/ha at 2 leaf stage to second node detectable (Zadok's G.S. 12 to 32). Water rate: 200 l/ha. For severe deficiency, increase to 2 l/ha or repeat at the above rate. For autumn-sown crops, an application prior to winter dormancy is strongly recommended. Seed Dressing: Typically 3 litres per tonne. Rate can be increased up to 6 litres per tonne if necessary.
En savoir plus YaraVita MANCOZINYaraVita ZINTRAC 700
Cereals: 1 l/ha from 2 leaf stage to second node detectable (Zadok's G.S. 12 to 32). Also, 0.5 l/ha from ear fully emerged to the end of flowering (Zadok's G.S. 59 to 69). Water rate: 50 to 200 l/ha. Seed Dressing: Typical rate: 3 litres per tonne. Increase up to 8 litres per tonne if necessary.
En savoir plus YaraVita ZINTRAC 700
