Which of the following is an example of viral disease ?

Options

A. Leaf curl of Papaya
B. Late blight of Potato
C. Black rust of Wheat
D. Red rot of Sugarcane

Answer

To determine which of the following is an example of a viral disease, we need to analyze the options provided.

1. **Identify the Options**: The question presents four options, which we need to evaluate to find out which one is caused by a virus.

2. **Evaluate Each Option**:
- **Option 1: Leaf curl of papaya**: This disease is caused by the Papaya Leaf Curl Virus (P-A-L-C-U-V). It affects the leaves of the papaya plant, causing them to curl either inward or outward. This curling can lead to distorted fruits or even no fruits at all. Therefore, this is a viral disease.
- **Option 2: Late blight of papaya**: This disease is caused by a fungus, not a virus. Hence, it is not a viral disease.
- **Option 3: Black rust of wheat**: This is also caused by a fungus, making it another non-viral disease.
- **Option 4: Red rot of sugarcane**: Similar to the previous options, this disease is caused by a fungus, thus it is not a viral disease.

3. **Conclusion**: After evaluating all the options, the only one that qualifies as a viral disease is the **Leaf curl of papaya**.

**Final Answer**: The example of a viral disease is **Leaf curl of papaya**.

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