Question

_____ is a common disease affecting potato plant which is caused by the fungus Phytophthora infestans.

• A. Brown rust
• B. Late blight
• C. Black rot
• D. Red rot

Answer 1

The correct option is B Late blight

Infectious plant diseases are caused due to pathogenic organisms such as bacteria, fungi, viruses and can account for 20-30% or even total crop loss in a season.

Phytophthora infestans, a fungus, causes the late blight disease in potatoes.

Brown rust is a common fungal disease in grasses, caused by Puccinia triticina. It affects wheat, barley and rye stems, leaves and grains.

Black rot is a bacterial disease caused by Xanthomonas campestris which affects crucifers e.g, cabbage, cauliflower, etc.

Red rot of sugarcane is caused by the fungus Glomerella tucumanensis.