Question

Early blight of potato is caused by

• A. Fusarium
• B. Alternaria
• C. Pythium
• D. Cercospora

Answer 1

The correct option is B Alternaria

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

So, the correct answer is option B.