Causal organism for Black Stem Rust of Wheat is:

Melanospora lini

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Claviceps purpurea

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Sclerospora graminicola

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Puccinia tritici

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Solution

The correct option is D
Puccinia tritici

Wheat stem rust, also known as black rust, is caused by the fungus Puccinia graminis. It is characterized by the presence of uredinia on the plant, which are brick-red, elongated, blister-like pustules which are easily shaken off. They most frequently occur on the leaf.

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