Question

Necrosis in crops is due to the deficiency of

• A. $Ca,K,Cu$ and $Mg$.
• B. $N,K,S$ and $Mo$.
• C. $N,S,Fe$ and $Zn$.
• D. $Mg,S,Mn$ and $Ca$.

Answer 1

The correct option is A $Ca,K,Cu$ and $Mg$.

Necrosis is the symptom of the disease that shows the death of plant cells. It can be caused by pathogens like fungi, virus and due to deficiency of nutrients such as Ca, K, Cu and Mg. K deficiency causes chlorosis which followed by the necrosis. Calcium causes curling, stunt growth which followed by necrosis and Mg causes necrosis.

Thus, the correct answer is option A.