Which one causes blight disease of Rice

Options

A. Xanthomonas
B. Pseudomonas
C. Alternaria
D. Erwinia

Explanation

**Step-by-Step Solution:**

1. **Identify the Disease**: The question asks about the causative agent of blight disease in rice. The specific disease referred to is the bacterial leaf blight of rice.

2. **Determine the Pathogen**: The pathogen responsible for the bacterial leaf blight of rice is known as *Xanthomonas oryzae*. This is a type of bacterium.

3. **Characteristics of the Pathogen**:
- *Xanthomonas oryzae* is classified as a Gram-negative bacterium.
- It is aerobic, meaning it requires oxygen for growth.
- This bacterium is capsulated, which helps it evade the host's immune response.
- It is motile, possessing a single polar flagellum that aids in its movement.

4. **Symptoms of the Disease**: The symptoms of bacterial leaf blight include:
- The appearance of linear yellow to straw-colored stripes on the leaves.
- These stripes typically appear on both edges of the leaf.
- As the disease progresses, the leaf tips may start to tie and twist.

5. **Conclusion**: Based on the information gathered, the correct answer to the question is *Xanthomonas oryzae*.

**Final Answer**: The causative agent of blight disease of rice is *Xanthomonas oryzae*.

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