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  4. Black rust of wheat is caused by :

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Q. Black rust of wheat is caused by :

BVP MedicalBVP Medical 2004

Solution:

Puccinia graninis causes black rust of wheat. The rust is host specific (a particular pathogen attack only a specific host). This phenomenon is called as biological specialization. Puccinia graminis tritici is specific to wheat while Puccinia graminis hordei specific to barley