Late blight of potato is caused by

Options

A. Bacteria
B. Fungi
C. Virus
D. Viroids

Answer

**Step-by-Step Solution:**

1. **Identify the Disease**: The question asks about the cause of "late blight of potato." This is a well-known plant disease that affects potato crops.

2. **Determine the Causative Agent**: Research indicates that late blight is caused by a specific organism. In this case, it is important to identify the scientific name of the organism responsible for this disease.

3. **Recognize the Organism Type**: The causative agent of late blight is identified as an oomycete. Oomycetes are a group of organisms that resemble fungi but are classified differently.

4. **Name the Specific Oomycete**: The specific organism responsible for late blight of potato is "Phytophthora infestans."

5. **Clarify the Classification**: It is important to note that while Phytophthora infestans is often referred to as a fungus-like organism, it is not a true fungus. Instead, it is classified as an oomycete, which is sometimes referred to as a water mold.

6. **Conclusion**: Therefore, the answer to the question is that the late blight of potato is caused by "Phytophthora infestans," an oomycete.

**Final Answer**: Late blight of potato is caused by Phytophthora infestans (an oomycete).

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