Question

The appearance of brown spots surrounded by chlorotic veins in leaves occurs due to the toxicity of:

• A. Mg
• B. Mn
• C. Mo
• D. Zn

Answer 1

Answer:

B. Mn

• The onset of manganese toxicity can be observed via appearance of prominent symptoms like brown spots and chlorotic (yellow appearance due to insufficient chlorophyll) veins in the leaves.

• Delay in flowering is a collective symptom for deficiency of nitrogen, sulphur, molybdenum.

• Necrosis that is the death of tissues such as leaf tissue is observed as a symptom in case of deficiency of calcium, magnesium, copper, potassium.