Correct Answer: Colletotrichum falcatum

Solution : The correct option is Colletotrichum falcatum .

Colletotrichum falcatum is a fungus that causes red rot in sugarcane. This fungus can cause severe yield and quality losses in sugarcane crops by infecting sugarcane plants. The reason it is called "red rot" is because diseased stalks show distinctive red lesions. The management of this disease involves several agricultural methods, including the selection of resistant cultivars, crop rotation, and the use of fungicides.