A weed, which has invaded many forests lands of India is
(a) Parthenium hysterophorus
(b) Chenopodium alba
(c) Lantana camara
(d) Eichhornia crassipes

Options

A. Parthenium hysterophorus
B. Chenopodium alba
C. Lantana camara
D. Eichhornia crassipes.

Answer

To determine which weed has invaded many forest lands of India, let's analyze each option step by step:

1. **Option (a): Parthenium hysterophorus**
- Commonly known as carrot grass.
- It is considered an invasive weed, but its invasion is limited to certain parts of India and does not significantly affect many forest lands.
- **Conclusion**: This option is incorrect.

2. **Option (b): Chenopodium alba**
- This plant is a weed in some regions, but it is also cultivated in certain areas as a staple food.
- It does not have a significant invasive impact on forest lands in India.
- **Conclusion**: This option is incorrect.

3. **Option (c): Lantana camara**
- Known as a noxious weed, it is of South American origin.
- It was introduced to India for ornamental purposes but has since invaded many regions, particularly in tropical and subtropical areas.
- It has a significant presence in forest lands and is recognized for its invasive characteristics.
- **Conclusion**: This option is correct.

4. **Option (d): Eichhornia crassipes**
- Commonly referred to as water hyacinth, it is known as the "terror of Bengal."
- While it is indeed an invasive species, it primarily affects aquatic ecosystems rather than forest lands.
- **Conclusion**: This option is incorrect.

**Final Answer**: The weed that has invaded many forest lands of India is **(c) Lantana camara**.

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