Which option is wrong regarding Albugo ?

Options

A. Cell wall is mainly chitinous
B. Obligate parasite
C. White rust disease
D. Member of phycomycetes

Answer

To determine which option is wrong regarding Albugo, we will analyze each statement provided in the question step by step.

### Step-by-Step Solution

1. **Understanding Albugo**: Albugo is a genus of fungi, specifically known for being plant pathogens. It is important to know its characteristics to evaluate the statements.

2. **Evaluating Statement A**:
- **Statement**: "Cell wall is mainly chitinous."
- **Analysis**: The cell wall of Albugo is primarily composed of cellulose, not chitin. Chitin is typically found in the cell walls of fungi like mushrooms, but not in Albugo.
- **Conclusion**: This statement is incorrect.

3. **Evaluating Statement B**:
- **Statement**: "Obligate parasite."
- **Analysis**: Albugo is indeed an obligate parasite, meaning it requires a living host to obtain nutrients and cannot survive independently.
- **Conclusion**: This statement is correct.

4. **Evaluating Statement C**:
- **Statement**: "Causes White Rust disease."
- **Analysis**: Albugo is known to cause White Rust disease in plants, particularly in crucifers.
- **Conclusion**: This statement is correct.

5. **Evaluating Statement D**:
- **Statement**: "Member of FICO Mycetes."
- **Analysis**: Albugo belongs to the kingdom Fungi and is classified under the group known as FICO Mycetes (or Oomycetes).
- **Conclusion**: This statement is correct.

### Final Answer
The wrong statement regarding Albugo is:
- **A**: "Cell wall is mainly chitinous."