How has biotechnology been useful in controlling nematode infection in plants ? Explain the technique involved in this process.

Explanation

### Step-by-Step Solution:

1. **Understanding Nematode Infection in Plants**:
- Nematodes, particularly *Meloidogyne incognita*, are parasitic roundworms that infect plants, causing significant damage and diseases, especially in tobacco plants.

2. **Role of Biotechnology**:
- Biotechnology, specifically genetic engineering, has been pivotal in developing methods to control nematode infections in plants.

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