Which of the following is the nematode that attacks the roots of tobacco plants ?

Options

A. Agrobacterium tumefaciens
B. Rhizobium leguminosarum
C. Meloidogyne incognita
D. Taenia solium

Answer

To determine the nematode that attacks the roots of tobacco plants, we can follow these steps:

1. **Identify the Options**: The question provides four options:
- Agrobacterium tumefaciens
- Rhizobium leguminosarum
- Meloidogyne incognita
- Taenia solium

2. **Understand the Organisms**:
- Agrobacterium tumefaciens is a bacterium known for causing crown gall disease in plants.
- Rhizobium leguminosarum is a bacterium that forms symbiotic relationships with legumes, helping them fix nitrogen.
- Meloidogyne incognita is a nematode that is known to attack the roots of various plants, including tobacco.
- Taenia solium is a parasitic flatworm (tapeworm) that affects humans, not plants.

3. **Analyze the Relevant Information**:
- Since the question specifically asks for a nematode that attacks the roots of tobacco plants, we need to focus on the nematode option, which is Meloidogyne incognita.

4. **Confirm the Correct Answer**:
- Among the options, Meloidogyne incognita is the only nematode listed and is known to cause significant damage to the roots of tobacco plants, leading to reduced yield.

5. **Final Conclusion**:
- Therefore, the correct answer to the question is **Meloidogyne incognita**.