Select the incorrect statement.

Options

A. In Garhwal region of Uttarakhand. Chipko movement, a tree hugging movement was started by Sundar Lal Bahuguna
B. Silviculture is the practice of controlling the establishment, health and quality of forests.
C. Poaching is a major threat to wildlife.
D. An arboretum is a place that maintains stocks of viable seeds, tissue culture and frozen germplasm.

Explanation

To solve the question of selecting the incorrect statement, we will analyze each statement provided and determine which one is false.

### Step-by-Step Solution:

1. **Analyze Statement A**:
- The statement claims that in the Garhwal region of Uttarakhand, the Chipko movement was started by Sundar Lal Bahuguna.
- This statement is **correct**. The Chipko movement, which focused on tree conservation, was indeed initiated by Sundar Lal Bahuguna.

2. **Analyze Statement B**:
- The statement asserts that sylviculture is the practice of controlling the establishment, health, and quality of forests.
- This statement is also **correct**. Sylviculture involves managing forest growth and health.

3. **Analyze Statement C**:
- The statement states that poaching is a major threat to wildlife.
- This statement is **correct**. Poaching poses a significant risk to wildlife populations and biodiversity.

4. **Analyze Statement D**:
- The statement claims that an algorism is a place that maintains stocks of viable seeds, tissue culture, and frozen germ plasm.
- This statement is **incorrect**. The correct term is "germplasm bank," which is a facility for preserving genetic material. An algorism does not refer to this.

5. **Conclusion**:
- Since we are asked to select the incorrect statement, the answer is **D**.

### Final Answer:
The incorrect statement is **D**.