Q. Kernel smut and Sheath blight are two common diseases which occur due to excessive use of nitrogen fertilizer. The diseases are most commonly found in which of the following crops? Answer:
Rice
Notes: Kernel smut of rice normally is a minor disease. Damage is caused by the endosperm of the rice grain being replaced by masses of black fungal spores. Sheath blight disease caused by the fungus Rhizoctonia solani. This fungus is very widespread in agricultural crops.