Question

Which one of the following is the wrong pairing for the disease and its causative organism?

• A. Late blight of potato - Alternaria solani
• B. Black rust of wheat - Puccinia graminis
• C. Loose smut of wheat - Ustilago
• D. Root-knot of vegetables - Meloidogyne

Answer 1

The correct option is A Late blight of potato - Alternaria solani

The fungus Alternaria solani produces early blight in potatoes. They spread by producing conidia which are able to germinate under optimum conditions of high moisture and temperature between 24 and 34${}^o$C and gets initiated within a short span of 30 minutes. The germ that develops can penetrate through the epidermis or stomata.