Which of the following can be controlled by using biopesticides ?

Options

A. Insects
B. Diseases
C. Weeds
D. All the above

Answer

To solve the question "Which of the following can be controlled by using biopesticides?" we will analyze the options provided and understand the role of biopesticides.

### Step-by-Step Solution:

1. **Understanding Biopesticides**:
- Biopesticides are natural substances derived from living organisms that are used to control pests. The term "bio" refers to living organisms, while "pesticide" refers to substances that kill pests.

2. **Identifying Types of Pests**:
- Pests can be categorized into several types, including:
- **Insects**: These are often the most common pests that affect crops, causing damage and reducing yield.
- **Weeds**: These are unwanted plants that compete with crops for nutrients, water, and sunlight.
- **Diseases**: These can be caused by pathogens such as fungi, bacteria, and viruses that affect plant health.

3. **Evaluating the Options**:
- The question provides the following options:
- A) Insects
- B) Diseases
- C) Weeds
- D) All of the above
- Since biopesticides can target all these types of pests (insects, diseases, and weeds), we need to determine if they can effectively control each one.

4. **Conclusion**:
- Since biopesticides are designed to manage a wide range of pests, including insects, diseases, and weeds, the correct answer is:
- **D) All of the above**

### Final Answer:
The correct option is **D) All of the above**.

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