Khaira disease of rice is due to the deficiency of

Khaira disease of rice is a micro-nutritional deficiency characterized by the presence of dusty brown patches on leaves which ultimately undergo necrosis. This is one of the common diseases in rice which is caused by the deficiency of Zinc (Zn).
Khaira disease affects the leaf of the plant. The rate of photosynthesis decreases which ultimately causes 25 - 30% production loss.