Ergot of rye is caused by a species of

Options

A. Ustilago
B. Claviceps
C. Erysiphe
D. Phytophthora

Answer

**Step-by-Step Solution:**

1. **Identify the Disease**: The question asks about "Ergot of rye," which is a specific disease affecting rye plants.

2. **Determine the Causative Agent**: Ergot of rye is caused by a fungus. It is important to identify the specific genus of this fungus.

3. **Identify the Genus**: The fungus responsible for ergot of rye belongs to the genus **Claviceps**.

4. **Classify the Fungus**: The genus Claviceps is classified under the category of **Ascomycetes**, which is a division of fungi known for producing spores in sac-like structures called asci.

5. **Understand the Impact**: The infection caused by Claviceps primarily affects the ovaries of the rye plant, leading to a decrease in the production of viable grains. This can also result in contamination of the harvest.

6. **Select the Correct Option**: Given the options provided, the correct answer is the genus **Claviceps**.

**Final Answer**: Ergot of rye is caused by a species of **Claviceps**.

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