Root rot of Sweet Potato is caused by

Options

A. Mucor mucedo
B. Rhizopus oryzae
C. Rhizopus stolonifer
D. Penicillium notatum.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the cause of root rot in sweet potatoes. We need to identify the correct fungal pathogen from the given options.

2. **Identifying the Options**: The options provided are:
- Mucor mucedo
- Rhizopus oryzae
- Rhizopus stolonifer
- Penicillium notatum

3. **Analyzing Each Option**:
- **Mucor mucedo**: This fungus is known to cause mucormycosis, not specifically root rot in sweet potatoes.
- **Rhizopus oryzae**: This fungus is associated with various spoilage issues but is not the primary cause of root rot in sweet potatoes.
- **Rhizopus stolonifer**: This is known as the soft rot fungus and is commonly responsible for root rot in sweet potatoes.
- **Penicillium notatum**: This fungus is known for causing otomycosis and is not related to root rot in sweet potatoes.

4. **Conclusion**: Based on the analysis, the correct answer is **Rhizopus stolonifer**, as it is the fungus that causes root rot in sweet potatoes.

5. **Final Answer**: The root rot of sweet potato is caused by **Rhizopus stolonifer**.

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