Which one of the following is not a fungal disease ?

Options

A. Rust of wheat
B. Smut of Bajra
C. Black rot of crucfers
D. Red rot of sugarcane

Answer

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

1. **Rust of Wheat**: This disease is caused by the fungus *Puccinia triticina*. Therefore, it is a fungal disease.

2. **Smut of Bajra**: This disease is caused by the fungus *Ustilago* species. Thus, it is also a fungal disease.

3. **Black Rot of Crucifers**: This disease is caused by the bacterium *Xanthomonas campestris*. Hence, it is **not** a fungal disease.

4. **Red Rot of Sugarcane**: This disease is caused by the fungus *Colletotrichum falcatum*. Therefore, it is a fungal disease.

After analyzing all the options, we can conclude that the **Black Rot of Crucifers** is the disease that is not caused by a fungus.

### Final Answer:
**Black Rot of Crucifers**

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