• Fn3Pt
  • Arvalis
  • innoplant
  • semae

Manganese deficiency


  • Role in the plant: manganese is important chiefly for the process of photosynthesis and as a metabolic activator.


  • Symptoms of deficiency: the young upper potato leaves have a dull green colour and show interveinal chlorosis with many small necrotic dots, localised mainly along the veins (photos 1 and 2). The plants are smaller, with necrotic areas on leaf margins (photo 2).


       Toxicity: excess of manganese, particularly in acidic soils, may cause the formation of pale green leaves and numerous necrotic spots on stems, petioles and can cover the entire leaf surface.

Last change : 07/12/18
Carence manganèse 2
Figure 1
Carence manganèse 1
Figure 2