Rust disease is caused by fungi belonging to

Options

A. Deuteromycetes
B. Basidiomycetes
C. Fungi imperfect
D. Ascomycetes

Answer

To solve the question regarding the causative agents of rust disease, we need to identify the correct group of fungi from the given options. Here’s a step-by-step breakdown of the solution:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks which group of fungi causes rust disease. We need to analyze the options provided.

2. **Analyzing Option 1 - Deuteromycetes**:
- Deuteromycetes, also known as fungi imperfecti, include fungi like Penicillium and Aspergillus.
- These fungi are not known for causing rust diseases.
- **Conclusion**: This option is incorrect.

3. **Analyzing Option 2 - Basidiomycetes**:
- Basidiomycetes include fungi that are known to cause various diseases, including rust diseases.
- A specific order within Basidiomycetes, called Uredinales, is responsible for rust diseases such as wheat rust.
- **Conclusion**: This option is likely correct.

4. **Analyzing Option 3 - Fungi Imperfecti**:
- Fungi imperfecti is another name for Deuteromycetes.
- Since we already established that Deuteromycetes do not cause rust diseases, this option is also incorrect.
- **Conclusion**: This option is incorrect.

5. **Analyzing Option 4 - Ascomycetes**:
- Ascomycetes include fungi that are economically important, such as baker's yeast.
- However, they are not known for causing rust diseases.
- **Conclusion**: This option is incorrect.

6. **Final Conclusion**: Based on the analysis, the correct answer is that rust disease is caused by fungi belonging to **Basidiomycetes**.

### Final Answer:
Rust disease is caused by fungi belonging to **Basidiomycetes**.

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