Symptoms
Leaves of Mn deficient plants show chlorotic spots and streaks which turn gray-white to brown and coalesce. Symptoms appear on younger and central leaves.
Leaves are kinked or bend down when the spotting is intense.
Plant growth is stunted.
Causes
Manganese deficiency
Mn deficiency is enhanced by cool, dry weather.
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.
Read more about YaraVita GRAMITRELCereals: 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.
Read more about YaraVita MANCOZINCereals: 1 l/ha from 2 leaf stage to second node detectable (Zadok's G.S. 12 to 32). For moderate to severe deficiency repeat applications at 7 to 14 day intervals. Also, 0.25 l/ha from third node detectable to the end of booting (Zadok's G.S. 33 to 49). Water rate: 200 l/ha. Seed Dressing: 2 to 6 litres per tonne.
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