Which of the following is incorrectly matched ?

Options

A. `{:("Disease",,"Causative organism"),("Green revolution",,"Bacteria"):}`
B. `{:("Disease",,"Causative organism"),("Brown rust of wheat",,"Fungi"):}`
C. `{:("Disease",,"Causative organism"),("Late blight of potato",,"Virus"):}`
D. `{:("Disease",,"Causative organism"),("Red rot of sugercane",,"Fungi"):}`

Explanation

To solve the question "Which of the following is incorrectly matched?" we will analyze each option provided in the question regarding the diseases and their causative organisms.

### Step-by-Step Solution:

1. **Identify the Diseases and Their Causative Organisms:**
- **Black Rot of Crucifers:** The causative organism is **Xanthomonas campestris** (bacteria).
- **Brown Rust of Wheat:** The causative organism is **Puccinia triticina** (fungus).
- **Late Blight of Potato:** The causative organism is **Phytophthora infestans** (fungus).
- **Red Rot of Sugarcane:** The causative organism is **Colletotrichum falcatum** (fungus).

2. **Match Each Disease with Its Causative Organism:**
- Black Rot of Crucifers → Xanthomonas campestris (Correct)
- Brown Rust of Wheat → Puccinia triticina (Correct)
- Late Blight of Potato → Phytophthora infestans (Incorrectly matched as virus in the question)
- Red Rot of Sugarcane → Colletotrichum falcatum (Correct)

3. **Identify the Incorrect Match:**
- The only incorrect match is for **Late Blight of Potato**, which is incorrectly listed as caused by a virus instead of the correct fungus **Phytophthora infestans**.

4. **Conclusion:**
- Therefore, the answer to the question is **Late Blight of Potato** (Option C).

### Final Answer:
The incorrectly matched disease is **Late Blight of Potato**.

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