Biology : PU-CET (U.G) 2015 Panjab University Entrance Exam With Answers

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4.

Black Rust Of Wheat Is Caused By

A: Puccinia Graminis Tritici

B: Albugo Candida

C: Ustilago Tritici

D: Anguina Tritici

The answer is: A

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Explanation

Black rust of wheat is caused by the fungal pathogen Puccinia graminis. The other organisms mentioned - Albugo candida, Ustilago tritici, and Anguina tritici - are not responsible for black rust of wheat.

Albugo candida is a pathogen that causes white rust in various plants,

Ustilago tritici causes loose smut of wheat,

and Anguina tritici is a nematode that causes ear cockle disease in wheat.