Name one common disease of paddy.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a common disease of paddy, which is another term for the rice crop.

2. **Identifying Common Diseases**: There are several diseases that affect paddy crops. One of the most common and significant diseases is the bacterial blight.

3. **Defining Bacterial Blight**: Bacterial blight is a serious disease caused by bacteria that affects rice plants. It is known for being highly destructive and can lead to significant yield losses.

4. **Impact of Bacterial Blight**: This disease can lead to the loss of up to 75% of the rice crop in affected areas, making it one of the most critical diseases for rice cultivation.

5. **Listing Other Diseases**: While the question asks for one common disease, it is also helpful to know other diseases that affect paddy, such as:
- Rice blast
- Bacterial leaf blight
- Rice tungro disease
- Sheath rot

6. **Final Answer**: The most common disease of paddy is bacterial blight.

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