Bordeaux used a fungicide is a mixture of

Options

A. `CuSO_4+Ca(OH)_2`
B. `CaSO_4+Cu(OH)_2`
C. `CuCO_3+Cu(OH)_2`
D. `CuO+CaO`

Answer

To answer the question regarding the composition of Bordeaux mixture used as a fungicide, we can follow these steps:

### Step 1: Identify the Components of Bordeaux Mixture
The Bordeaux mixture is primarily known to consist of two main components. These components are:

- Copper sulfate (CuSO4)
- Calcium hydroxide (Ca(OH)2)

### Step 2: Understand the Purpose of Each Component
- **Copper sulfate (CuSO4)**: This compound acts as the active fungicidal agent. It helps in controlling various fungal diseases in plants.
- **Calcium hydroxide (Ca(OH)2)**: Also known as slaked lime, it serves to neutralize the acidity of the copper sulfate and helps in the stability of the mixture.

### Step 3: Formulate the Mixture
When these two components are mixed together, they form a suspension that can be effectively used to spray on plants to prevent fungal infections.

### Step 4: Application of the Mixture
The Bordeaux mixture is commonly used in vineyards, fruit farms, and gardens to protect crops from diseases such as downy mildew and powdery mildew.

### Conclusion
Thus, the Bordeaux mixture used as a fungicide is a mixture of copper sulfate (CuSO4) and calcium hydroxide (Ca(OH)2).

### Final Answer
The correct answer for the given question is:
**Copper sulfate (CuSO4) + Calcium hydroxide (Ca(OH)2)**

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