Which one the following is not a fungal disease ?

Options

A. Rust of wheat
B. Smut of bajra
C. Black rot of Cauliflower
D. Blight of Cowpea

Answer

To determine which of the following is not a fungal disease, we will analyze each option provided.

### Step-by-Step Solution:

1. **Identify the first option: Rust of Wheat**
- Rust of wheat is caused by the fungus **Puccinia triticina**.
- Since it is caused by a fungus, this option is a fungal disease.

2. **Identify the second option: Smut of Bajra**
- The smut of Bajra is caused by the fungus **Tolyposporium penicillariae**.
- This means that this option is also a fungal disease.

3. **Identify the third option: Black Rot of Cauliflower**
- Black rot of cauliflower is caused by the bacterium **Xanthomonas campestris**.
- Since this disease is caused by a bacterium and not a fungus, this option is not a fungal disease.

4. **Identify the fourth option: Blight of Cowpea**
- The blight of cowpea is caused by the fungus **Rhizoctonia solani**.
- Therefore, this option is a fungal disease.

### Conclusion:
After analyzing all the options, we find that the **Black Rot of Cauliflower** is the only disease that is not caused by a fungus, but rather by a bacterium.

Thus, the correct answer is **Black Rot of Cauliflower**.

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