Claviceps purpurea is causal organism of

Options

A. Powdery mildew of pea
B. Ergot of rye
C. Rust of wheat
D. Smut of barley

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question asks about Claviceps purpurea, which is a type of fungus.

2. **Understand the Options**: The options provided are:
- Powdery mildew
- Ergot of rye
- Rust of wheat
- Smut of barley

3. **Research Claviceps purpurea**: Claviceps purpurea is known to belong to the group of fungi referred to as ergot fungi. It primarily affects rye and other cereals.

4. **Match with the Options**:
- Powdery mildew is caused by Podosphaera xanthi.
- Rust of wheat is caused by Puccinia species.
- Smut of barley is caused by Ustilago hordei.
- Ergot of rye is specifically caused by Claviceps purpurea.

5. **Conclusion**: Based on the information, Claviceps purpurea is the causative organism of the ergot of rye.

6. **Final Answer**: The correct answer is **Ergot of rye**.

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