LOOK FOR

Look for in leaves
• MANGANESE DEFICIENCY
• Leaves with a yellow mottle (not near-white as from zinc deficiency)
• The mottle bounded by fine green veins
• A dark-green border around the main veins, but thinner than magnesium and thicker than iron deficiencies
• A normal sinus angle where the leaf joins the petiole (not open from zinc deficiency
  

   CONDITIONS

• Tissue analyses are often needed to correctly identify nutritional disorders
• MANGANESE DEFICIENCY
• Most common on older leaves after flowering and in vines on sandy soils high in lime