The correct option is B Tikka disease, Fungal
In tikka disease,
∙ All leaves of the affected plant have powdery spots.
∙ Root infections like boring worms, insects or fungus are not seen above the ground but it makes the plant wilt.
∙ Rotting of roots and emission of foul smell is common.
Control measures that can be used are to:
∙ Remove the affected leaves from the plant and burn them.
∙ Use of pesticides like Dithane M-45 and Eldrine.