Most serious disease of sugarcane is

Answer: Option B

There are various diseases caused by the number of pathogens in sugarcane. These are Red Rot, Wilt, Grassy shoot, Smut, Leaf Scald disease, Mosaic disease, Red striped Disease, etc.
Out of all these, the most serious disease of sugarcane is Red rot, caused by the fungus Colletotrichum falcatum. It is characterized by interrupted red and white patches within the cane along with a sour odour.