the first mycoherbicide of the world was obtained from

Options

A. Trichoderma harzianum
B. Phythora palmivora
C. Calctblastis cactorm
D. Pythium debaiynum

Answer

To answer the question "The first mycoherbicide of the world was obtained from," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Mycoherbicides**:
- Mycoherbicides are biological herbicides derived from fungi. They are used to control unwanted plants (weeds) by targeting their growth and survival.

2. **Identifying the Options**:
- The options provided are:
1. Trichoderma harzianum
2. Phytophthora palmivora
3. Cactoblastis cactorum
4. Pythium debanum

3. **Researching Each Option**:
- **Trichoderma harzianum**: Known for its role in biocontrol but not specifically as a mycoherbicide.
- **Phytophthora palmivora**: This fungus is recognized as the first mycoherbicide used to control the strangler vine weed in citrus crops.
- **Cactoblastis cactorum**: This is a moth, not a fungus, and is not relevant to mycoherbicides.
- **Pythium debanum**: Another fungus, but it is not known for being the first mycoherbicide.

4. **Conclusion**:
- Based on the information, the first mycoherbicide of the world was obtained from **Phytophthora palmivora**.

### Final Answer:
The first mycoherbicide of the world was obtained from **Phytophthora palmivora**.

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